DBDB.io The Encyclopedia of Database Systems · Est. 2017
Login
Database of Databases

775 Systems Found

Databases Classified as Open Source
3store
Abandoned Project
2003 Triplestore / RDF Open Source
Abandoned Project
4store
Abandoned Project
2009 Triplestore / RDF Open Source
Abandoned Project
abhot
Time-Series Forked Code Abandoned Project
2017 — Open Source
Time-Series Forked Code Abandoned Project
Accumulo
NoSQL
2008 Column Family / Wide-Column Open Source
NoSQL
AceBase
Web Browser
2018 Document / XML Open Source
Web Browser
AceDB
Abandoned Project
1989 — Open Source
Abandoned Project
ActorDB
Abandoned Project
2014 Relational Open Source
Abandoned Project
Aerospike
NoSQL AI-Assisted
2009 Document / XML, Key/Value, Vector Open Source
NoSQL AI-Assisted
AgateDB
Abandoned Project
2019 Key/Value Open Source
Abandoned Project
AGEDB
Middleware AI-Assisted
2019 Graph Open Source
Middleware AI-Assisted
AgensGraph
Forked Code Multi-Model Acquired Company
2013 Document / XML, Graph, Key/Value, Relational Open Source
Forked Code Multi-Model Acquired Company
AionDB
Multi-Model
2026 Graph, Relational, Vector Open Source
Multi-Model
AKDB
2009 Relational Open Source
Akumuli
Abandoned Project
2013 — Open Source
Abandoned Project
Akutan
Abandoned Project
2019 Triplestore / RDF Open Source
Abandoned Project
AlaSQL
AI-Assisted
2014 Document / XML, Relational Open Source
AI-Assisted
AlchemyDB
Acquired Company Abandoned Project
2010 Relational Open Source
Acquired Company Abandoned Project
Alenka
Abandoned Project
2012 Relational Open Source
Abandoned Project
AllocDB
2026 Relational Open Source
allydb
2025 — Open Source
Altinity
Forked Code AI-Assisted Hosting Service
2017 — Open Source
Forked Code AI-Assisted Hosting Service
Amelie
OLTP
2023 Relational Open Source
OLTP
AngstromDB
Abandoned Project
2013 Key/Value Open Source
Abandoned Project
AnnaDB
Abandoned Project NoSQL
2021 Document / XML Open Source
Abandoned Project NoSQL
AnnDB
Nearest Neighbor Search
2020 Vector Open Source
Nearest Neighbor Search
AntDB
Forked Code
— Relational Open Source
Forked Code
Antfly
2026 — Open Source
Antidote
2015 Key/Value Open Source
AnuDB
Serverless NoSQL
2025 Document / XML Open Source
Serverless NoSQL
AODBM
Abandoned Project
2011 — Open Source
Abandoned Project
Arakoon
Abandoned Project
2010 Key/Value Open Source
Abandoned Project
ArangoDB
Multi-Model AI-Assisted
2011 Document / XML, Graph, Key/Value Open Source
Multi-Model AI-Assisted
ArcadeDB
Forked Code AI-Assisted
2021 Document / XML, Graph, Key/Value, Relational Open Source
Forked Code AI-Assisted
ArcticDB
Time-Series OLAP AI-Assisted
2018 Relational Open Source
Time-Series OLAP AI-Assisted
Ardb
Abandoned Project
2013 Key/Value Open Source
Abandoned Project
AresDB
OLAP Abandoned Project
2018 Relational Open Source
OLAP Abandoned Project
AriaSQL
Abandoned Project
2024 Relational Open Source
Abandoned Project
Ark
2026 — Open Source
Arroyo
Streaming
2023 — Open Source
Streaming
Asami
2018 Graph Open Source
Assassin
Abandoned Project Peer-to-Peer
2020 Key/Value Open Source
Abandoned Project Peer-to-Peer
AsterixDB
OLAP AI-Assisted
2009 Document / XML Open Source
OLAP AI-Assisted
Atlas
Time-Series AI-Assisted
2014 — Open Source
Time-Series AI-Assisted
AverageDB
Parody / Joke
2024 Document / XML Open Source
Parody / Joke
AvionDB
Abandoned Project Peer-to-Peer
2020 Document / XML Open Source
Abandoned Project Peer-to-Peer
AwaDB
Abandoned Project Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Abandoned Project Nearest Neighbor Search
Axion
2002 Relational Open Source
BabuDB
Abandoned Project
2008 Key/Value Open Source
Abandoned Project
BadgerDB
AI-Assisted
2017 Key/Value Open Source
AI-Assisted
Bagri
Abandoned Project
2014 Document / XML Open Source
Abandoned Project
BaikalDB
2018 Relational Open Source
BangDB
Multi-Model NoSQL
2015 Key/Value Open Source
Multi-Model NoSQL
BaraDB
Multi-Model AI-Assisted
2026 Column Family / Wide-Column, Document / XML, Graph Open Source
Multi-Model AI-Assisted
Barrel DB DocDB
2025 — Open Source
Barrel DB Vector
2025 — Open Source
BaseX
AI-Assisted
2007 Document / XML Open Source
AI-Assisted
BayesDB
Abandoned Project
2015 — Open Source
Abandoned Project
bbolt
Forked Code Revival Project
2017 Key/Value Open Source
Forked Code Revival Project
BBoxDB
AI-Assisted
2015 Array / Matrix Open Source
AI-Assisted
Beagle SQL
Abandoned Project
1996 Relational Open Source
Abandoned Project
Bedrock
Blockchain OLTP AI-Assisted
2016 Relational Open Source
Blockchain OLTP AI-Assisted
BemiDB
Acquired Company
2024 — Open Source
Acquired Company
BergDB
2013 Document / XML Open Source
Beringei
Time-Series Abandoned Project
2015 Key/Value Open Source
Time-Series Abandoned Project
Berkeley DB
Acquired Company OLTP DBM
1994 Document / XML, Key/Value Open Source
Acquired Company OLTP DBM
BerylDB
2021 Key/Value Open Source
BigchainDB
Abandoned Project Blockchain
2015 Document / XML, Key/Value Open Source
Abandoned Project Blockchain
BinaryRage
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
Bitcask
Abandoned Project
2019 Key/Value Open Source
Abandoned Project
Bitsy
2013 Graph Open Source
BlackRay
Failed Company
2005 Relational Open Source
Failed Company
Blazegraph
Acquired Company Abandoned Project
2006 Graph, Triplestore / RDF Open Source
Acquired Company Abandoned Project
BlazingSQL
OLAP Abandoned Project Failed Company
2015 Relational Open Source
OLAP Abandoned Project Failed Company
Bleve
Search Engine AI-Assisted
2014 Document / XML, Vector Open Source
Search Engine AI-Assisted
BlinkDB
Abandoned Project
2012 Relational Open Source
Abandoned Project
Blueflood
Time-Series Abandoned Project
2013 Column Family / Wide-Column Open Source
Time-Series Abandoned Project
BoJack
Abandoned Project
2016 Key/Value Open Source
Abandoned Project
BoltDB
Abandoned Project
2013 Key/Value Open Source
Abandoned Project
BonsaiDb
2021 Key/Value Open Source
BrightstarDB
Abandoned Project
2012 Triplestore / RDF Open Source
Abandoned Project
BroDB
Parody / Joke
2024 Relational Open Source
Parody / Joke
BTDB
OLTP
2010 Key/Value, Object-Oriented Open Source
OLTP
BTrDB
Abandoned Project
2014 Relational Open Source
Abandoned Project
bugfruit
Abandoned Project
2022 Key/Value Open Source
Abandoned Project
BuntDB
OLTP
2016 Key/Value Open Source
OLTP
BusTub
2019 Relational Open Source
ByConity
OLAP
2020 Relational Open Source
OLAP
Cachegrand
Cache
2018 Key/Value Open Source
Cache
Calvin
Abandoned Project
2012 Relational Open Source
Abandoned Project
CamaDB
Web Browser Abandoned Project NoSQL
2021 Document / XML Open Source
Web Browser Abandoned Project NoSQL
CaskDB
2022 Key/Value Open Source
Cassandra
NoSQL AI-Assisted
2008 Key/Value, Column Family / Wide-Column Open Source
NoSQL AI-Assisted
CastleDB
2012 Document / XML Open Source
Cayley
2014 Triplestore / RDF Open Source
cdb
Immutable
1996 Key/Value Open Source
Immutable
ChaiSQL
2018 Document / XML Open Source
chaozzDB
Abandoned Project
2008 — Open Source
Abandoned Project
chDB
OLAP Acquired Company AI-Assisted
2023 Relational Open Source
OLAP Acquired Company AI-Assisted
Cheetah
xBase
2005 Relational Open Source
xBase
Chroma
Nearest Neighbor Search AI-Assisted
2022 Document / XML Open Source
Nearest Neighbor Search AI-Assisted
chromem-go
Nearest Neighbor Search
2023 Vector Open Source
Nearest Neighbor Search
ChromoDB
Abandoned Project
2024 Key/Value Open Source
Abandoned Project
Chronicle Map
AI-Assisted
2014 Key/Value Open Source
AI-Assisted
Chronix
Time-Series Abandoned Project
2015 — Open Source
Time-Series Abandoned Project
Citus
OLAP Acquired Company AI-Assisted
2010 Relational Open Source
OLAP Acquired Company AI-Assisted
ClickHouse
OLAP AI-Assisted
2016 Relational Open Source
OLAP AI-Assisted
CloseVector
Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Nearest Neighbor Search
Cloudberry
OLAP Forked Code Revival Project
2023 Relational Open Source
OLAP Forked Code Revival Project
CloudKit
Abandoned Project
2008 Document / XML Open Source
Abandoned Project
CloverDB
NoSQL AI-Assisted
2022 Document / XML Open Source
NoSQL AI-Assisted
CnosDB
Time-Series
2021 Relational Open Source
Time-Series
CockroachDB
NewSQL OLTP AI-Assisted
2014 Relational Open Source
NewSQL OLTP AI-Assisted
CodernityDB
2011 Key/Value Open Source
CoGaDB
Abandoned Project
2012 Relational Open Source
Abandoned Project
CogDB
2017 Triplestore / RDF Open Source
Coherence
Cache Acquired Company
2000 Object-Oriented Open Source
Cache Acquired Company
Column
2021 Relational Open Source
Comdb2
AI-Assisted
2004 Relational Open Source
AI-Assisted
Compass
Abandoned Project Search Engine
2006 Document / XML, Object-Oriented Open Source
Abandoned Project Search Engine
ComposeDB
Blockchain
2022 Graph Open Source
Blockchain
ComputeDB
OLAP Acquired Company Abandoned Project
2015 Relational Open Source
OLAP Acquired Company Abandoned Project
ConceptBase.cc
1995 Object-Oriented Open Source
Concourse
2012 Document / XML Open Source
Condensation
Abandoned Project Blockchain
2020 Object-Oriented Open Source
Abandoned Project Blockchain
Consus
2004 Relational Open Source
Consus
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
CORAL
1988 — Open Source
CoreObject
Abandoned Project
2007 Object-Oriented Open Source
Abandoned Project
Couchbase
NoSQL
2010 Key/Value, Document / XML Open Source
NoSQL
CouchDB
NoSQL
2005 Document / XML Open Source
NoSQL
CovenantSQL
Abandoned Project Blockchain
2018 Relational Open Source
Abandoned Project Blockchain
CozoDB
2022 Relational Open Source
CQL++
Failed Company
1994 Relational Open Source
Failed Company
CQLite
Abandoned Project
2021 Graph Open Source
Abandoned Project
CrateDB
2014 — Open Source
CruzDB
2016 — Open Source
CSQL
Failed Company
2005 Relational Open Source
Failed Company
C-Store
Abandoned Project
2005 Relational Open Source
Abandoned Project
CubicWeb
2000 Graph Open Source
Cubrid
AI-Assisted
2008 Relational Open Source
AI-Assisted
CurioDB
Abandoned Project NoSQL
2015 Key/Value Open Source
Abandoned Project NoSQL
CursusDB
Abandoned Project NoSQL
2023 Document / XML Open Source
Abandoned Project NoSQL
DalmatinerDB
Abandoned Project
2014 — Open Source
Abandoned Project
Dare-DB
NoSQL
2024 Key/Value Open Source
NoSQL
Databend
AI-Assisted
2020 Relational Open Source
AI-Assisted
DataFusion
Query Engine AI-Assisted
2016 Relational Open Source
Query Engine AI-Assisted
Datahike
AI-Assisted
2018 — Open Source
AI-Assisted
Datalevin
2020 Document / XML Open Source
DataScript
2014 Key/Value Open Source
db4o
Acquired Company Abandoned Project
2000 Object-Oriented Open Source
Acquired Company Abandoned Project
DB5
Abandoned Project Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Abandoned Project Nearest Neighbor Search
dbeel
Abandoned Project NoSQL
2023 Document / XML Open Source
Abandoned Project NoSQL
DBreeze
Multi-Model
2012 Document / XML, Key/Value Open Source
Multi-Model
DBx1000
Abandoned Project
2014 Relational Open Source
Abandoned Project
DeepDB
Abandoned Project Failed Company
2010 Relational Open Source
Abandoned Project Failed Company
DefraDB
Peer-to-Peer AI-Assisted
2019 Document / XML Open Source
Peer-to-Peer AI-Assisted
DegDB
Abandoned Project
2015 Graph Open Source
Abandoned Project
Delta Lake
AI-Assisted
2019 Column Family / Wide-Column Open Source
AI-Assisted
DensoDB
Abandoned Project
2012 Document / XML Open Source
Abandoned Project
Derby
Acquired Company Abandoned Project OLTP
1997 Relational Open Source
Acquired Company Abandoned Project OLTP
DeveelDB
Abandoned Project OLTP
2009 Relational Open Source
Abandoned Project OLTP
DGraph
Acquired Company AI-Assisted
2015 Graph Open Source
Acquired Company AI-Assisted
DiceDB
OLTP
2022 Key/Value Open Source
OLTP
discodb
Parody / Joke
2026 — Open Source
Parody / Joke
DocumentDB
Middleware NoSQL AI-Assisted
2023 Document / XML Open Source
Middleware NoSQL AI-Assisted
Dolt
Versioning AI-Assisted
2018 Relational Open Source
Versioning AI-Assisted
Doris
OLAP AI-Assisted
2017 Relational Open Source
OLAP AI-Assisted
Doxa
Abandoned Project
2021 Document / XML Open Source
Abandoned Project
Dqlite
2017 Relational Open Source
Dragonfly
Cache AI-Assisted
2021 Key/Value Open Source
Cache AI-Assisted
Dremio
OLAP Query Engine Acquired Company Data Lake
2015 Relational Open Source
OLAP Query Engine Acquired Company Data Lake
DriftDB
Immutable AI-Assisted
2025 Relational Open Source
Immutable AI-Assisted
Drill
OLAP AI-Assisted
2012 Column Family / Wide-Column Open Source
OLAP AI-Assisted
Drizzle
Forked Code Abandoned Project
2008 Relational Open Source
Forked Code Abandoned Project
Druid
OLAP AI-Assisted
2011 Column Family / Wide-Column Open Source
OLAP AI-Assisted
DuckDB
OLAP AI-Assisted
2018 Relational Open Source
OLAP AI-Assisted
DuctileDB
Abandoned Project
2015 Graph Open Source
Abandoned Project
DyBASE
— Object-Oriented Open Source
DynomiteDB
Abandoned Project
2012 — Open Source
Abandoned Project
Earthstar
Peer-to-Peer
2020 Document / XML Open Source
Peer-to-Peer
EaseDB
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
EchoDB
2021 Key/Value Open Source
EdgelessDB
Abandoned Project
2021 Relational Open Source
Abandoned Project
Edis
Abandoned Project NoSQL
2010 Key/Value Open Source
Abandoned Project NoSQL
EffiProz
Abandoned Project
— Relational Open Source
Abandoned Project
Ehcache
Cache Acquired Company
2003 Key/Value Open Source
Cache Acquired Company
EinsteinDB
Abandoned Project
2019 Key/Value Open Source
Abandoned Project
EJDB
2012 Key/Value, Document / XML Open Source
Elara DB
Abandoned Project
2021 Key/Value Open Source
Abandoned Project
ElaSQL
Abandoned Project
2016 Relational Open Source
Abandoned Project
Elasticsearch
Search Engine NoSQL AI-Assisted
2004 Document / XML Open Source
Search Engine NoSQL AI-Assisted
ElephantDB
Abandoned Project
2011 Key/Value Open Source
Abandoned Project
Elevator
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
EliasDB
Abandoned Project
2016 Graph Open Source
Abandoned Project
Elliptics
Abandoned Project
2009 Key/Value Open Source
Abandoned Project
EmbedDB
Time-Series
2023 Relational Open Source
Time-Series
Endatabas
OLAP Abandoned Project OLTP Immutable
2023 Document / XML, Relational Open Source
OLAP Abandoned Project OLTP Immutable
Endee
AI-Assisted
2026 — Open Source
AI-Assisted
Engram
AI-Assisted
2026 Graph Open Source
AI-Assisted
Engula
2022 Key/Value Open Source
EnnoDB
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
Epsilla
Nearest Neighbor Search
2023 Array / Matrix Open Source
Nearest Neighbor Search
etcd
Acquired Company
2013 Key/Value Open Source
Acquired Company
EuclidesDB
Abandoned Project
2018 Array / Matrix Open Source
Abandoned Project
EuclidOLAP
OLAP
2022 Array / Matrix Open Source
OLAP
EVA DB
Abandoned Project
2018 Relational Open Source
Abandoned Project
EVCache
Cache
2012 Key/Value Open Source
Cache
EventQL
OLAP Abandoned Project
2014 Relational Open Source
OLAP Abandoned Project
evitaDB
AI-Assisted
2020 Document / XML Open Source
AI-Assisted
EvolvSQL
OLTP
2026 Relational Open Source
OLTP
eXist-db
NoSQL AI-Assisted
2000 Document / XML Open Source
NoSQL AI-Assisted
ExtendDB
Middleware AI-Assisted
2026 Key/Value, Document / XML Open Source
Middleware AI-Assisted
Extensible Storage Engine
1994 Key/Value Open Source
EyeDB
Abandoned Project
1992 Object-Oriented Open Source
Abandoned Project
eyros
Time-Series Abandoned Project
2018 Array / Matrix Open Source
Time-Series Abandoned Project
Falcon
Abandoned Project
2006 — Open Source
Abandoned Project
FalkorDB
AI-Assisted
2023 Graph Open Source
AI-Assisted
Fallen-8
Abandoned Project
2011 Graph Open Source
Abandoned Project
FastDB
2011 Relational Open Source
FASTER
2018 Key/Value Open Source
FeatureBase
Abandoned Project Search Engine
2017 Relational Open Source
Abandoned Project Search Engine
FeatureForm
Acquired Company Nearest Neighbor Search
2020 Vector Open Source
Acquired Company Nearest Neighbor Search
FerresDB
AI-Assisted
2026 — Open Source
AI-Assisted
FerretDB
AI-Assisted
2021 Document / XML Open Source
AI-Assisted
Ferrite
OLTP
2024 Relational Open Source
OLTP
FileDb
Abandoned Project NoSQL
2011 Relational Open Source
Abandoned Project NoSQL
FileDB
Abandoned Project
2010 Key/Value Open Source
Abandoned Project
FiloDB
2015 — Open Source
FineDB
Abandoned Project NoSQL
2013 Key/Value Open Source
Abandoned Project NoSQL
Firebird
AI-Assisted
2000 Relational Open Source
AI-Assisted
Fireproof
Peer-to-Peer AI-Assisted
2022 Document / XML Open Source
Peer-to-Peer AI-Assisted
Fjall
OLTP
2023 Key/Value Open Source
OLTP
FlashDB
2020 Key/Value Open Source
FlashFiler
Failed Company
1985 — Open Source
Failed Company
FleetDB
Abandoned Project
2009 Document / XML Open Source
Abandoned Project
FlockDB
Abandoned Project
2010 Graph Open Source
Abandoned Project
Fluree
Blockchain AI-Assisted
2017 Document / XML, Graph, Triplestore / RDF, Relational Open Source
Blockchain AI-Assisted
Fongo
Abandoned Project NoSQL
2012 Document / XML Open Source
Abandoned Project NoSQL
ForestDB
Abandoned Project
2013 Key/Value Open Source
Abandoned Project
FoundationDB
Acquired Company OLTP AI-Assisted
2009 Key/Value Open Source
Acquired Company OLTP AI-Assisted
FramerD
1996 Object-Oriented Open Source
Frigatebird
OLAP
2025 Relational Open Source
OLAP
FrostDB
Time-Series
2022 Column Family / Wide-Column Open Source
Time-Series
FuelDB
Abandoned Project
2014 Document / XML Open Source
Abandoned Project
Gadfly
Abandoned Project
1994 Relational Open Source
Abandoned Project
Gaffer
Abandoned Project
2016 Entity-Relationship Open Source
Abandoned Project
Gaia
Abandoned Project Failed Company
2020 Object-Oriented Open Source
Abandoned Project Failed Company
Garnet
Cache AI-Assisted
2021 Key/Value Open Source
Cache AI-Assisted
GDBM
DBM
1990 Key/Value Open Source
DBM
Gel
OLAP AI-Assisted
2018 Relational Open Source
OLAP AI-Assisted
GenosDB
AI-Assisted
2025 — Open Source
AI-Assisted
Geode
Cache Forked Code OLTP NoSQL
2015 Key/Value Open Source
Cache Forked Code OLTP NoSQL
GhostDB
Cache Abandoned Project
2020 Key/Value Open Source
Cache Abandoned Project
GigaBASE
— Relational Open Source
GitDB
Versioning
2026 — Open Source
Versioning
GlareDB
Abandoned Project Middleware AI-Assisted
2022 Relational Open Source
Abandoned Project Middleware AI-Assisted
Glowdust
2023 Relational Open Source
Gnocchi
Time-Series Middleware
2014 Relational Open Source
Time-Series Middleware
GNU SQL Server
1997 Relational Open Source
GoatDB
Web Browser AI-Assisted
2024 Document / XML Open Source
Web Browser AI-Assisted
GOODS
— Object-Oriented Open Source
GoshawkDB
Abandoned Project
2015 Object-Oriented Open Source
Abandoned Project
Grafeo
AI-Assisted
2026 — Open Source
AI-Assisted
GrapheekDB
Abandoned Project
2014 Key/Value, Graph Open Source
Abandoned Project
Graphik
Abandoned Project
2020 Document / XML Open Source
Abandoned Project
GraphLite
2025 — Open Source
Graviton
Versioning Abandoned Project
2020 Key/Value Open Source
Versioning Abandoned Project
GreatSQL
2020 Relational Open Source
GreptimeDB
Time-Series AI-Assisted
2022 Relational Open Source
Time-Series AI-Assisted
GridDB
2011 Key/Value Open Source
GridGain
2007 Key/Value Open Source
GUN
Peer-to-Peer
2014 Graph Open Source
Peer-to-Peer
H2
2004 Relational Open Source
Hadoop
OLAP AI-Assisted
2006 — Open Source
OLAP AI-Assisted
HailDB
Abandoned Project
2010 Key/Value Open Source
Abandoned Project
HaloDB
Abandoned Project
2017 Key/Value Open Source
Abandoned Project
HaloDB Revive
Revival Project
2017 — Open Source
Revival Project
HampusDB
2006 Key/Value Open Source
HanoiDB
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
HAWQ
OLAP Abandoned Project Middleware
2015 Relational Open Source
OLAP Abandoned Project Middleware
HaystackDB
Abandoned Project Nearest Neighbor Search MMAP
2024 Vector Open Source
Abandoned Project Nearest Neighbor Search MMAP
Hazelcast
Cache
2008 Key/Value Open Source
Cache
HBase
NoSQL
2007 Column Family / Wide-Column Open Source
NoSQL
HeavyDB
OLAP Acquired Company Abandoned Project
2013 Relational Open Source
OLAP Acquired Company Abandoned Project
HelinDB
2021 — Open Source
HelixDB
OLTP Nearest Neighbor Search AI-Assisted
2024 Graph, Vector Open Source
OLTP Nearest Neighbor Search AI-Assisted
HerdDB
2016 Relational Open Source
Heroic
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
HexxlaDB
AI-Assisted
2026 — Open Source
AI-Assisted
Hibari
Acquired Company Abandoned Project
2005 Key/Value Open Source
Acquired Company Abandoned Project
hipsterDB
Parody / Joke Abandoned Project
2013 Key/Value Open Source
Parody / Joke Abandoned Project
Histore
Abandoned Project
2018 Key/Value Open Source
Abandoned Project
Hive
Abandoned Project
2019 Key/Value Open Source
Abandoned Project
Hive
OLAP
2010 Relational Open Source
OLAP
HollowDB
Abandoned Project Blockchain
2023 Key/Value Open Source
Abandoned Project Blockchain
HoraeDB
Time-Series Abandoned Project
2021 Relational Open Source
Time-Series Abandoned Project
H-Store
NewSQL Abandoned Project OLTP
2006 Relational Open Source
NewSQL Abandoned Project OLTP
HStreamDB
Streaming
2020 Relational Open Source
Streaming
HugeGraph
Middleware AI-Assisted
2017 Graph Open Source
Middleware AI-Assisted
Hydra
OLAP Abandoned Project Failed Company
2022 Relational Open Source
OLAP Abandoned Project Failed Company
HydrAIDE
AI-Assisted
2025 — Open Source
AI-Assisted
HyperDB
Parody / Joke Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Parody / Joke Nearest Neighbor Search
HyperDex
Abandoned Project NoSQL
2011 Key/Value Open Source
Abandoned Project NoSQL
HyperGraphDB
2007 Graph Open Source
HyperSQL
2001 Relational Open Source
Hypertable
Acquired Company Abandoned Project
2008 Column Family / Wide-Column Open Source
Acquired Company Abandoned Project
Hyrise
OLAP
2009 Relational Open Source
OLAP
Icecoal
Abandoned Project
2020 Relational Open Source
Abandoned Project
IceFireDB
2021 Key/Value Open Source
Ignite
2014 Key/Value Open Source
ImmortalDB
Web Browser
2018 Key/Value Open Source
Web Browser
Immudb
Immutable AI-Assisted
2019 Key/Value Open Source
Immutable AI-Assisted
Impala
OLAP AI-Assisted
2013 Relational Open Source
OLAP AI-Assisted
InfiniDB
OLAP Abandoned Project Failed Company
2000 Relational Open Source
OLAP Abandoned Project Failed Company
Infinispan
Cache
2009 Key/Value Open Source
Cache
InfiniSQL
Abandoned Project OLTP
2013 Relational Open Source
Abandoned Project OLTP
Infino
Query Engine Nearest Neighbor Search
— Relational Open Source
Query Engine Nearest Neighbor Search
InfluxDB
Time-Series AI-Assisted
2013 Column Family / Wide-Column Open Source
Time-Series AI-Assisted
InfoGrid
2008 Graph Open Source
Ingres
Acquired Company
1974 Relational Open Source
Acquired Company
IonDB
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
IoTDB
Time-Series AI-Assisted
2017 Hierarchical Open Source
Time-Series AI-Assisted
Irmin
2013 Document / XML Open Source
IssunDB
2026 — Open Source
Jackrabbit
2004 Object-Oriented Open Source
JaguarDB
Nearest Neighbor Search
2017 Array / Matrix, Key/Value Open Source
Nearest Neighbor Search
JameSQL
NoSQL
2024 Document / XML Open Source
NoSQL
JanusGraph
Acquired Company
2012 Graph Open Source
Acquired Company
JasDB
2013 Document / XML Open Source
jasonisnthappy
OLTP
2025 Document / XML Open Source
OLTP
Jazz
AI-Assisted
2026 Relational Open Source
AI-Assisted
Jena
AI-Assisted
2000 Triplestore / RDF Open Source
AI-Assisted
JinDB
Abandoned Project
2019 — Open Source
Abandoned Project
Joedb
2014 Relational Open Source
JSDB
Abandoned Project
2020 Document / XML Open Source
Abandoned Project
jsonstore.io
Abandoned Project
2018 Document / XML Open Source
Abandoned Project
JSqlDb
2017 Document / XML Open Source
JuliaDB
Abandoned Project
2017 Relational Open Source
Abandoned Project
JunoDB
Abandoned Project NoSQL
— Key/Value Open Source
Abandoned Project NoSQL
JustinDB
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
k4
Abandoned Project
2024 — Open Source
Abandoned Project
KahaDB
— — Open Source
Kai
Abandoned Project
2008 Key/Value Open Source
Abandoned Project
KairosDB
Time-Series
2013 — Open Source
Time-Series
KantoDB
OLTP
2025 Relational Open Source
OLTP
Kappa
Abandoned Project
1989 Relational Open Source
Abandoned Project
KarelDB
2019 Relational Open Source
KekeDB
— Relational Open Source
KektorDB
Nearest Neighbor Search
2025 Graph Open Source
Nearest Neighbor Search
KenobiDB
Abandoned Project Middleware
2019 Document / XML Open Source
Abandoned Project Middleware
Kerf
2014 — Open Source
KeyDB
Acquired Company Abandoned Project NoSQL
2019 — Open Source
Acquired Company Abandoned Project NoSQL
KingDB
Abandoned Project MMAP
2012 Key/Value Open Source
Abandoned Project MMAP
Kinto
NoSQL AI-Assisted
2014 Document / XML Open Source
NoSQL AI-Assisted
KirbyBase
Abandoned Project
2003 — Open Source
Abandoned Project
Krati
Abandoned Project OLTP NoSQL
2010 Key/Value Open Source
Abandoned Project OLTP NoSQL
Kronicler
2025 — Open Source
Kronotop
NoSQL
2023 Document / XML Open Source
NoSQL
ksqlDB
Streaming AI-Assisted
2017 Key/Value, Relational Open Source
Streaming AI-Assisted
Kudu
OLTP
2016 Relational Open Source
OLTP
Kunlun
Abandoned Project
2019 Relational Open Source
Abandoned Project
KurrentDB
Time-Series AI-Assisted
2012 Document / XML Open Source
Time-Series AI-Assisted
Kuzu
Acquired Company Abandoned Project Nearest Neighbor Search
2020 Graph Open Source
Acquired Company Abandoned Project Nearest Neighbor Search
KVDB
2026 — Open Source
Kvrocks
NoSQL AI-Assisted
2019 Key/Value Open Source
NoSQL AI-Assisted
Kylin
2013 Key/Value Open Source
Kyoto Cabinet
2009 Key/Value Open Source
Kyoto Tycoon
— Key/Value Open Source
Kyuubi
Middleware AI-Assisted
2017 Relational Open Source
Middleware AI-Assisted
LadybugDB
Forked Code Revival Project AI-Assisted
2025 Graph Open Source
Forked Code Revival Project AI-Assisted
lakeql
Query Engine AI-Assisted
2026 Relational Open Source
Query Engine AI-Assisted
LanceDB
Search Engine AI-Assisted
2023 Document / XML Open Source
Search Engine AI-Assisted
Lazer
2013 Document / XML Open Source
Lealone
2012 Relational Open Source
LeanStore
OLTP
2018 Key/Value Open Source
OLTP
LEAP
1997 Relational Open Source
LedisDB
Abandoned Project NoSQL
2014 Key/Value Open Source
Abandoned Project NoSQL
libmdbx
Forked Code MMAP
2015 Key/Value Open Source
Forked Code MMAP
libSQL
Forked Code OLTP
2022 Relational Open Source
Forked Code OLTP
LightCloud
Abandoned Project
2009 Key/Value Open Source
Abandoned Project
LightDB
Abandoned Project
2017 Array / Matrix Open Source
Abandoned Project
LightDB
NoSQL
2021 Document / XML Open Source
NoSQL
LinDB
2019 Column Family / Wide-Column Open Source
LineairDB
AI-Assisted
2020 Key/Value Open Source
AI-Assisted
LingoDB
OLAP AI-Assisted
2021 Relational Open Source
OLAP AI-Assisted
LintDB
Nearest Neighbor Search
2024 Vector Open Source
Nearest Neighbor Search
LiteDB
2014 Document / XML Open Source
LittleD
Abandoned Project
— — Open Source
Abandoned Project
LlamaDB
Abandoned Project
2015 — Open Source
Abandoned Project
LMDB
MMAP DBM AI-Assisted
2011 Key/Value Open Source
MMAP DBM AI-Assisted
LocalSQL
2001 Relational Open Source
LocustDB
2017 Relational Open Source
LogosDB
AI-Assisted
2026 Vector Open Source
AI-Assisted
LokiJS
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
LokiVector
2013 — Open Source
LonaDB
NoSQL
2023 Document / XML Open Source
NoSQL
LotusDB
OLTP
2021 Key/Value Open Source
OLTP
Lovefield
Web Browser Abandoned Project
2014 Relational Open Source
Web Browser Abandoned Project
LowDB
2014 Document / XML Open Source
Lucene
Search Engine MMAP AI-Assisted
1999 Document / XML Open Source
Search Engine MMAP AI-Assisted
LucidDB
OLAP Abandoned Project
2004 Relational Open Source
OLAP Abandoned Project
LungoDB
2019 Document / XML Open Source
M3DB
Time-Series AI-Assisted
2018 Relational Open Source
Time-Series AI-Assisted
Magma
2002 Object-Oriented Open Source
MangoDB
Parody / Joke Abandoned Project NoSQL
2012 Document / XML Open Source
Parody / Joke Abandoned Project NoSQL
Manticore Search
Search Engine
2017 Relational Open Source
Search Engine
MapDB
Abandoned Project
2012 Object-Oriented Open Source
Abandoned Project
MarcelloDB
Abandoned Project
2014 Object-Oriented Open Source
Abandoned Project
MariaDB
AI-Assisted
2009 Relational Open Source
AI-Assisted
Mariposa
1994 Relational Open Source
Marqo
Search Engine AI-Assisted
2022 Document / XML, Vector Open Source
Search Engine AI-Assisted
MatrixOne
OLAP OLTP Streaming AI-Assisted
2021 Relational Open Source
OLAP OLTP Streaming AI-Assisted
mcdb
Abandoned Project Immutable MMAP
2010 Key/Value Open Source
Abandoned Project Immutable MMAP
Mckoi SQL Database
Abandoned Project Failed Company
1998 Relational Open Source
Abandoned Project Failed Company
Meilisearch
Search Engine AI-Assisted
2018 Document / XML Open Source
Search Engine AI-Assisted
Memcached
Cache
2003 Key/Value Open Source
Cache
MemCP
OLAP AI-Assisted
2022 Relational Open Source
OLAP AI-Assisted
Memgraph
AI-Assisted
2016 Graph Open Source
AI-Assisted
Memstate
Abandoned Project
2017 Object-Oriented Open Source
Abandoned Project
Mentat
Abandoned Project
2016 Relational Open Source
Abandoned Project
MenteDB
AI-Assisted
2026 Vector, Graph Open Source
AI-Assisted
MetalBase
Abandoned Project
— Relational Open Source
Abandoned Project
Milvus
Nearest Neighbor Search AI-Assisted
2019 Vector Open Source
Nearest Neighbor Search AI-Assisted
Mimir
Time-Series AI-Assisted
2016 Relational Open Source
Time-Series AI-Assisted
mkdb
2023 Relational Open Source
MLDB
Acquired Company
2015 — Open Source
Acquired Company
MMKV
2018 — Open Source
Mnesia
— Relational Open Source
MobyDB
2026 Key/Value Open Source
ModeShape
Abandoned Project
2008 Object-Oriented Open Source
Abandoned Project
Mondrian
OLAP Acquired Company
2002 Relational Open Source
OLAP Acquired Company
MonetDB
OLAP MMAP
2002 Column Family / Wide-Column Open Source
OLAP MMAP
MongoDB
NoSQL AI-Assisted
2009 Document / XML Open Source
NoSQL AI-Assisted
Monotone
2023 — Open Source
Mulgara
Abandoned Project
2006 Triplestore / RDF Open Source
Abandoned Project
Multigres
Middleware AI-Assisted
2025 Relational Open Source
Middleware AI-Assisted
MuopDB
2024 — Open Source
mutable
2019 — Open Source
MyScaleDB
OLAP Forked Code Failed Company AI-Assisted
2021 Relational Open Source
OLAP Forked Code Failed Company AI-Assisted
MySQL
Acquired Company
1994 Relational Open Source
Acquired Company
NamiDB
NoSQL
2026 Graph Open Source
NoSQL
Nanolat
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
NarayanaDB
2025 — Open Source
NCache
Cache
2015 Key/Value Open Source
Cache
NDatabase
— Object-Oriented Open Source
NDB Cluster
Acquired Company OLTP
— Key/Value Open Source
Acquired Company OLTP
Nebula Graph
2018 Graph Open Source
NeDB
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
NEO
2005 Document / XML Open Source
Neo4j
NoSQL AI-Assisted
2007 Graph Open Source
NoSQL AI-Assisted
NeoDatis ODB
Abandoned Project
2006 Object-Oriented Open Source
Abandoned Project
Neon
Serverless Forked Code Acquired Company OLTP
2021 Relational Open Source
Serverless Forked Code Acquired Company OLTP
nessDB
Abandoned Project
2011 Key/Value Open Source
Abandoned Project
Neug
AI-Assisted
2026 Graph Open Source
AI-Assisted
Nitrite
NoSQL AI-Assisted
2017 Document / XML Open Source
NoSQL AI-Assisted
NodeDB
Multi-Model Nearest Neighbor Search AI-Assisted
2026 Vector, Graph, Array / Matrix, Document / XML, Relational Open Source
Multi-Model Nearest Neighbor Search AI-Assisted
NoisePage
2018 Relational Open Source
NoKV
NoSQL AI-Assisted
2024 Key/Value Open Source
NoSQL AI-Assisted
Noms
Versioning Abandoned Project
2015 Document / XML Open Source
Versioning Abandoned Project
NornicDB
Nearest Neighbor Search AI-Assisted
2025 Graph Open Source
Nearest Neighbor Search AI-Assisted
NosDB
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
nubmq
Cache
2024 — Open Source
Cache
NucliaDB
Nearest Neighbor Search Search Engine
2021 Vector Open Source
Nearest Neighbor Search Search Engine
NuDB
Abandoned Project
2016 Key/Value Open Source
Abandoned Project
Numstore
Query Engine
2026 Array / Matrix Open Source
Query Engine
NunDB
2018 Object-Oriented Open Source
NutsDB
AI-Assisted
2018 Key/Value Open Source
AI-Assisted
OasysDB
Nearest Neighbor Search
2023 Key/Value, Vector Open Source
Nearest Neighbor Search
ObjectBox
Time-Series Nearest Neighbor Search MMAP Mobile NoSQL
2016 Object-Oriented Open Source
Time-Series Nearest Neighbor Search MMAP Mobile NoSQL
OceanBase
2010 Relational Open Source
Ocelot
Failed Company
2001 Relational Open Source
Failed Company
OctaneDB
Nearest Neighbor Search
2025 Vector Open Source
Nearest Neighbor Search
OctoSQL
Query Engine Abandoned Project
2019 Relational Open Source
Query Engine Abandoned Project
ODABA
1994 Object-Oriented Open Source
OlegDB
MMAP NoSQL
2014 Key/Value Open Source
MMAP NoSQL
openGemini
Time-Series AI-Assisted
2022 Relational Open Source
Time-Series AI-Assisted
open-gpdb
OLAP Forked Code
2024 Relational Open Source
OLAP Forked Code
OpenMLDB
2017 Relational Open Source
OpenQM
Acquired Company
1993 Multi-Value Open Source
Acquired Company
OpenSearch
Forked Code Search Engine AI-Assisted
2021 Document / XML Open Source
Forked Code Search Engine AI-Assisted
OpenTSDB
Time-Series
2010 Key/Value Open Source
Time-Series
OpenViking
AI-Assisted
2026 — Open Source
AI-Assisted
Opteryx
OLAP Serverless AI-Assisted
2021 Relational Open Source
OLAP Serverless AI-Assisted
Oracle NoSQL
NoSQL
2011 Key/Value Open Source
NoSQL
OrbitDB
Peer-to-Peer
2015 Document / XML, Key/Value Open Source
Peer-to-Peer
OrientDB
Multi-Model Acquired Company NoSQL
2010 Document / XML, Graph, Key/Value, Object-Oriented Open Source
Multi-Model Acquired Company NoSQL
OrigoDB
Abandoned Project
2011 Key/Value, Graph, Object-Oriented, Document / XML, Relational Open Source
Abandoned Project
OrioleDB
Acquired Company AI-Assisted
2021 Relational Open Source
Acquired Company AI-Assisted
Oxia
AI-Assisted
2021 Key/Value Open Source
AI-Assisted
OxidSQL
2022 Relational Open Source
Oxigraph
2018 Graph, Triplestore / RDF Open Source
Pail
Peer-to-Peer
2022 Key/Value Open Source
Peer-to-Peer
PalDB
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
Paper
Abandoned Project NoSQL
2015 Key/Value, Object-Oriented Open Source
Abandoned Project NoSQL
ParadeDB
OLAP Nearest Neighbor Search Search Engine AI-Assisted
2023 Relational Open Source
OLAP Nearest Neighbor Search Search Engine AI-Assisted
PearlDB
Abandoned Project
2015 Key/Value Open Source
Abandoned Project
Pebble
AI-Assisted
2018 Key/Value Open Source
AI-Assisted
Percona Server
Forked Code
2006 Relational Open Source
Forked Code
Perst
Acquired Company
2003 Object-Oriented Open Source
Acquired Company
Phoenix
Middleware
2014 Relational Open Source
Middleware
PhotonDB
Abandoned Project
2022 Key/Value Open Source
Abandoned Project
pickleDB
2011 Document / XML Open Source
PicoDB
Abandoned Project
2016 Document / XML Open Source
Abandoned Project
picoSQL
Abandoned Project
1995 Relational Open Source
Abandoned Project
Pika
AI-Assisted
2014 Key/Value Open Source
AI-Assisted
piladb
Abandoned Project
2015 Object-Oriented Open Source
Abandoned Project
Pilosa
Abandoned Project
2017 Vector Open Source
Abandoned Project
Pincaster
2010 Document / XML Open Source
Pinot
OLAP AI-Assisted
2014 Relational Open Source
OLAP AI-Assisted
PinusDB
Abandoned Project
2019 Relational Open Source
Abandoned Project
PipelineDB
Acquired Company Abandoned Project Streaming
2013 Relational Open Source
Acquired Company Abandoned Project Streaming
PocketBase
2022 Relational Open Source
Pogocache
Cache
2025 Key/Value Open Source
Cache
Pogreb
MMAP
2018 Key/Value Open Source
MMAP
Polars
Query Engine AI-Assisted
2020 — Open Source
Query Engine AI-Assisted
PoloDB
NoSQL
2020 Document / XML Open Source
NoSQL
Polypheny
2017 Document / XML, Graph, Relational Open Source
PostgreSQL
OLTP
1986 Relational Open Source
OLTP
PouchDB
Web Browser NoSQL
2010 Document / XML Open Source
Web Browser NoSQL
PranaDB
Abandoned Project
2022 Relational Open Source
Abandoned Project
Predator
1996 Relational Open Source
PrestoDB
OLAP AI-Assisted
2013 Document / XML, Key/Value, Column Family / Wide-Column, Relational Open Source
OLAP AI-Assisted
ProfaneDB
Abandoned Project
2017 Object-Oriented Open Source
Abandoned Project
Prometheus
Time-Series AI-Assisted
2012 Key/Value Open Source
Time-Series AI-Assisted
Proton
Streaming AI-Assisted
2021 Relational Open Source
Streaming AI-Assisted
PuffinDB
Serverless Abandoned Project
2023 Relational Open Source
Serverless Abandoned Project
PumpkinDB
Abandoned Project Immutable
2017 Key/Value Open Source
Abandoned Project Immutable
PupDB
Abandoned Project
2019 Key/Value Open Source
Abandoned Project
PysonDB
Abandoned Project NoSQL
2020 Document / XML Open Source
Abandoned Project NoSQL
qikkDB
OLAP Abandoned Project Failed Company
2019 Relational Open Source
OLAP Abandoned Project Failed Company
ql
2013 Relational Open Source
qlever
2014 — Open Source
Qserv
AI-Assisted
2011 Relational Open Source
AI-Assisted
Quadrable
Abandoned Project
2020 Key/Value Open Source
Abandoned Project
QuestDB
Time-Series AI-Assisted
2014 Relational Open Source
Time-Series AI-Assisted
Quickbase
— — Open Source
Quickstep
OLAP Abandoned Project
2013 Relational Open Source
OLAP Abandoned Project
Quickwit
Acquired Company Search Engine AI-Assisted
2021 Document / XML Open Source
Acquired Company Search Engine AI-Assisted
QuineDB
2016 Key/Value Open Source
Quokka
OLAP Abandoned Project
2021 Relational Open Source
OLAP Abandoned Project
RadonDB
Abandoned Project Failed Company
2018 Relational Open Source
Abandoned Project Failed Company
RageDB
Abandoned Project
2021 Graph Open Source
Abandoned Project
RamSQL
2014 Relational Open Source
Raphtory
OLAP AI-Assisted
2020 Graph Open Source
OLAP AI-Assisted
RaptorDB
Abandoned Project
2012 Document / XML Open Source
Abandoned Project
Rasdaman
1989 Array / Matrix Open Source
RavenDB
MMAP NoSQL AI-Assisted
2009 Document / XML, Key/Value Open Source
MMAP NoSQL AI-Assisted
RayforceDB
OLAP AI-Assisted
2023 Relational Open Source
OLAP AI-Assisted
Realm
Acquired Company Abandoned Project Mobile
2011 Object-Oriented Open Source
Acquired Company Abandoned Project Mobile
redb
OLTP AI-Assisted
2018 Key/Value Open Source
OLTP AI-Assisted
Redcon
2016 Key/Value Open Source
Redict
Cache Forked Code NoSQL
2024 Key/Value Open Source
Cache Forked Code NoSQL
Redis
Cache OLTP AI-Assisted
2009 Key/Value Open Source
Cache OLTP AI-Assisted
RedisGraph
2018 Graph Open Source
RediSQL
Abandoned Project
2016 Relational Open Source
Abandoned Project
RedixDB
Abandoned Project
2018 Key/Value Open Source
Abandoned Project
RedoxQL
2024 — Open Source
RedStore
Abandoned Project
2009 Triplestore / RDF Open Source
Abandoned Project
ReductStore
Time-Series AI-Assisted
2021 Key/Value Open Source
Time-Series AI-Assisted
Redwood
Abandoned Project Peer-to-Peer
2019 Key/Value Open Source
Abandoned Project Peer-to-Peer
RefineDB
Abandoned Project
2021 Document / XML Open Source
Abandoned Project
ReifyDB
OLTP
2025 Relational Open Source
OLTP
Rel
2004 Relational Open Source
Relatude.DB
2025 Graph, Object-Oriented Open Source
Relaxo
Abandoned Project
2012 Document / XML Open Source
Abandoned Project
ResilientDB
Blockchain
2019 Document / XML Open Source
Blockchain
RethinkDB
Failed Company NoSQL
2009 Document / XML Open Source
Failed Company NoSQL
RexDB
Acquired Company
2006 Relational Open Source
Acquired Company
RhizomeDB
Abandoned Project Peer-to-Peer
2022 Relational Open Source
Abandoned Project Peer-to-Peer
Riak
Abandoned Project Failed Company NoSQL
2010 Key/Value Open Source
Abandoned Project Failed Company NoSQL
Riffle
Abandoned Project Immutable
2014 — Open Source
Abandoned Project Immutable
RisingLight
2021 Relational Open Source
RisingWave
Streaming AI-Assisted
2021 Relational Open Source
Streaming AI-Assisted
RocksDB
Forked Code OLTP
2012 Key/Value Open Source
Forked Code OLTP
ROMA
Abandoned Project
2009 Key/Value Open Source
Abandoned Project
RonDB
OLTP AI-Assisted
2020 Key/Value, Relational Open Source
OLTP AI-Assisted
RoseDB
NoSQL AI-Assisted
2020 Key/Value Open Source
NoSQL AI-Assisted
rqlite
AI-Assisted
2014 Relational Open Source
AI-Assisted
RxDB
AI-Assisted
2016 Document / XML Open Source
AI-Assisted
Rya
Abandoned Project Middleware NoSQL
2012 Triplestore / RDF Open Source
Abandoned Project Middleware NoSQL
SableDb
Cache NoSQL
2024 Key/Value Open Source
Cache NoSQL
Salvobase
AI-Assisted
2026 — Open Source
AI-Assisted
Sanakirja
— — Open Source
SapphireDb
Abandoned Project
2018 Object-Oriented Open Source
Abandoned Project
Satori
2025 — Open Source
sboxdb
2024 — Open Source
Scalaris
Abandoned Project
— Key/Value Open Source
Abandoned Project
ScalienDB
Abandoned Project Failed Company
2010 Key/Value Open Source
Abandoned Project Failed Company
SchemaJS
2024 — Open Source
SciDB
OLAP
2008 Array / Matrix Open Source
OLAP
ScratchDB
OLAP Middleware
2023 Document / XML Open Source
OLAP Middleware
Scylla
NoSQL AI-Assisted
2014 Key/Value, Column Family / Wide-Column Open Source
NoSQL AI-Assisted
SDB
— Document / XML, Relational Open Source
Seafowl
OLAP Acquired Company
2022 Relational Open Source
OLAP Acquired Company
Sedna
Abandoned Project
2003 Document / XML Open Source
Abandoned Project
SeekDB
AI-Assisted
2025 — Open Source
AI-Assisted
SenseiDB
Abandoned Project
2012 Relational Open Source
Abandoned Project
Sequins
Abandoned Project
2014 Key/Value Open Source
Abandoned Project
SequoiaDB
2011 Document / XML Open Source
Serenity
Abandoned Project NoSQL
2015 — Open Source
Abandoned Project NoSQL
Sesame
1997 Triplestore / RDF Open Source
ShannonBase
2024 Relational, Vector Open Source
ShardingSphere
AI-Assisted
2016 Relational Open Source
AI-Assisted
Shore
Abandoned Project OLTP
1995 Object-Oriented Open Source
Abandoned Project OLTP
Shore-MT
Forked Code OLTP
2007 Object-Oriented Open Source
Forked Code OLTP
shsql
2002 Relational Open Source
SignalDB
NoSQL AI-Assisted
2023 Document / XML Open Source
NoSQL AI-Assisted
Silo
Abandoned Project
2013 Relational Open Source
Abandoned Project
Sir.DB
Abandoned Project
2020 Document / XML Open Source
Abandoned Project
SiriDB
Time-Series
2016 — Open Source
Time-Series
Sirius
OLAP Query Engine AI-Assisted
2024 Relational Open Source
OLAP Query Engine AI-Assisted
SirixDB
AI-Assisted
2012 Document / XML Open Source
AI-Assisted
Skeg
Multi-Model
2026 — Open Source
Multi-Model
SkeletonDB
Abandoned Project
2016 — Open Source
Abandoned Project
Sklad
NoSQL
2024 Key/Value Open Source
NoSQL
SKSQL
Abandoned Project
2021 Relational Open Source
Abandoned Project
SkyDB
2013 — Open Source
Skyrise
OLAP Serverless Query Engine
2019 Relational Open Source
OLAP Serverless Query Engine
Skytable
NoSQL
2020 Key/Value Open Source
NoSQL
SlateDB
AI-Assisted
2024 Key/Value Open Source
AI-Assisted
Sled
2016 Key/Value Open Source
SleekDB
2018 Document / XML Open Source
SlothDB
2026 Relational Open Source
Slumber DB
Abandoned Project
2014 Key/Value Open Source
Abandoned Project
SmallSQL
Abandoned Project
2005 Relational Open Source
Abandoned Project
Sneller
2022 Document / XML Open Source
SochDB
AI-Assisted
2026 Graph, Relational, Vector Open Source
AI-Assisted
SolarSystemDB
Serverless Failed Company
2024 — Open Source
Serverless Failed Company
SoloDB
2024 — Open Source
Solr
Search Engine NoSQL AI-Assisted
2004 Document / XML Open Source
Search Engine NoSQL AI-Assisted
sones GraphDB
Abandoned Project Failed Company
2007 Graph Open Source
Abandoned Project Failed Company
Sonnerie
Time-Series
— Relational Open Source
Time-Series
SpacetimeDB
OLTP AI-Assisted
2023 Relational Open Source
OLTP AI-Assisted
Sparkey
Abandoned Project Immutable
2013 Key/Value Open Source
Abandoned Project Immutable
Sparksee
2006 Graph, Object-Oriented Open Source
Spark SQL
OLAP AI-Assisted
2014 — Open Source
OLAP AI-Assisted
SparrowDB
Abandoned Project
2016 Key/Value Open Source
Abandoned Project
Speedy
Abandoned Project
— Relational Open Source
Abandoned Project
Sphinx
Search Engine
2001 Document / XML Open Source
Search Engine
SpiceDB
Middleware AI-Assisted
2021 Object-Oriented Open Source
Middleware AI-Assisted
Splice Machine
Abandoned Project Failed Company
2012 — Open Source
Abandoned Project Failed Company
SplinterDB
NoSQL
2018 Key/Value Open Source
NoSQL
SQLite
OLTP
2000 Relational Open Source
OLTP
Squirreling
Query Engine Web Browser AI-Assisted
2025 Relational Open Source
Query Engine Web Browser AI-Assisted
SRCH²
Abandoned Project
2010 — Open Source
Abandoned Project
SSDB
Abandoned Project
2013 Key/Value Open Source
Abandoned Project
StarRocks
OLAP AI-Assisted
2021 Relational, Column Family / Wide-Column Open Source
OLAP AI-Assisted
Starskey
OLTP
2025 Key/Value Open Source
OLTP
StellarSQL
Abandoned Project
2018 Relational Open Source
Abandoned Project
StereoDB
OLTP
2023 Relational Open Source
OLTP
Stig
Abandoned Project Failed Company
2010 Graph Open Source
Abandoned Project Failed Company
StoneDB
OLAP Failed Company
2022 Relational Open Source
OLAP Failed Company
Stoolap
OLAP OLTP
2025 Relational Open Source
OLAP OLTP
StormiDB
NoSQL
2024 Document / XML Open Source
NoSQL
Strabon
2011 Triplestore / RDF Open Source
StrixDB
— Triplestore / RDF Open Source
Strozzi NoSQL
1989 Relational Open Source
STSdb
Failed Company
2008 Key/Value Open Source
Failed Company
SummitDB
Abandoned Project NoSQL
2016 Key/Value Open Source
Abandoned Project NoSQL
SurrealDB
Serverless Multi-Model AI-Assisted
2016 Document / XML, Graph, Relational Open Source
Serverless Multi-Model AI-Assisted
SwayDB
Abandoned Project
2018 Key/Value Open Source
Abandoned Project
SWC-DB
Abandoned Project
2019 Column Family / Wide-Column, Key/Value Open Source
Abandoned Project
SwellDB
AI-Assisted
2025 Relational Open Source
AI-Assisted
SylvaDB
Abandoned Project
2009 Graph Open Source
Abandoned Project
SylvieJS
Web Browser
2023 Document / XML Open Source
Web Browser
System G
2009 Graph Open Source
TabDB
Parody / Joke Abandoned Project
2019 Relational Open Source
Parody / Joke Abandoned Project
TaffyDB
Abandoned Project
2009 Document / XML Open Source
Abandoned Project
Tajo
OLAP Abandoned Project
2012 Relational Open Source
OLAP Abandoned Project
Tantivy
Search Engine MMAP AI-Assisted
2016 Document / XML Open Source
Search Engine MMAP AI-Assisted
Tarantool
2008 Key/Value Open Source
TayzGrid
— Object-Oriented Open Source
TDengine
Time-Series AI-Assisted
2017 Relational Open Source
Time-Series AI-Assisted
Tendis
NoSQL
2018 Key/Value Open Source
NoSQL
TensorBase
OLAP Abandoned Project Failed Company
2020 Relational Open Source
OLAP Abandoned Project Failed Company
Tera
Abandoned Project
2014 Column Family / Wide-Column Open Source
Abandoned Project
TerarkDB
Forked Code Acquired Company
2016 Key/Value Open Source
Forked Code Acquired Company
TerminusDB
AI-Assisted
2019 Document / XML, Graph, Triplestore / RDF Open Source
AI-Assisted
Terrastore
2009 Document / XML Open Source
ThinkSQL
Abandoned Project
2000 Relational Open Source
Abandoned Project
ThreadDB
Abandoned Project Peer-to-Peer
2019 Document / XML Open Source
Abandoned Project Peer-to-Peer
ThruDB
2006 — Open Source
TiDB
NewSQL AI-Assisted
2015 Key/Value Open Source
NewSQL AI-Assisted
TidesDB
OLTP
2024 Column Family / Wide-Column Open Source
OLTP
tiedot
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
TieredMemDB
Cache Forked Code Abandoned Project NoSQL
2020 Key/Value Open Source
Cache Forked Code Abandoned Project NoSQL
TigerBeetle
2020 Relational Open Source
TiKV
AI-Assisted
2016 Key/Value Open Source
AI-Assisted
Tile38
2016 — Open Source
TileDB
NoSQL
2014 Array / Matrix Open Source
NoSQL
Timbala
Time-Series Abandoned Project
2016 Relational Open Source
Time-Series Abandoned Project
TIMBER
— Document / XML Open Source
TingoDB
Abandoned Project
2013 Document / XML Open Source
Abandoned Project
TinyBase
2021 Relational Open Source
TinyDB
Query Engine Peer-to-Peer
1999 Relational Open Source
Query Engine Peer-to-Peer
TinyDB
2013 Document / XML Open Source
tinySQL
2003 — Open Source
Titan
Acquired Company Abandoned Project
2012 Graph Open Source
Acquired Company Abandoned Project
Titan
Abandoned Project
2018 — Open Source
Abandoned Project
Tkrzw
DBM
2020 Key/Value Open Source
DBM
TokuDB
Acquired Company Abandoned Project
2009 Relational Open Source
Acquired Company Abandoned Project
TokuMX
Forked Code Acquired Company Abandoned Project
2013 Document / XML Open Source
Forked Code Acquired Company Abandoned Project
Tokyo Cabinet
2006 Key/Value Open Source
Tokyo Tyrant
— — Open Source
TomP2P
Abandoned Project
2004 Key/Value Open Source
Abandoned Project
Tonbo
OLTP AI-Assisted
2024 Key/Value Open Source
OLTP AI-Assisted
TopK
Nearest Neighbor Search Search Engine AI-Assisted
2024 Document / XML Open Source
Nearest Neighbor Search Search Engine AI-Assisted
ToplingDB
Forked Code AI-Assisted
2021 Key/Value Open Source
Forked Code AI-Assisted
ToroDB
Abandoned Project
— Document / XML Open Source
Abandoned Project
toyDB
2019 Relational Open Source
Trafodion
Abandoned Project
2014 Column Family / Wide-Column Open Source
Abandoned Project
TrailDB
Abandoned Project
2014 Relational Open Source
Abandoned Project
TreodeDB
Abandoned Project
2012 Key/Value Open Source
Abandoned Project
Trino
AI-Assisted
2019 — Open Source
AI-Assisted
Trousseau
2013 Key/Value Open Source
tsink
Time-Series
2025 — Open Source
Time-Series
ts-sql
Abandoned Project
2020 Relational Open Source
Abandoned Project
TuGraph
2021 Graph Open Source
Turso
OLTP AI-Assisted
2023 Relational Open Source
OLTP AI-Assisted
Twig
2009 Object-Oriented Open Source
TypeDB
AI-Assisted
2016 Entity-Relationship, Graph Open Source
AI-Assisted
Typhon
AI-Assisted
2015 — Open Source
AI-Assisted
Typhoon
Abandoned Project
1996 Relational Open Source
Abandoned Project
UnisonDB
Multi-Model
2025 Column Family / Wide-Column, Key/Value Open Source
Multi-Model
UnQLite
OLTP NoSQL
— Document / XML, Key/Value Open Source
OLTP NoSQL
upscaledb
OLAP Abandoned Project
2007 Key/Value Open Source
OLAP Abandoned Project
Vald
Nearest Neighbor Search Search Engine AI-Assisted
2019 Vector Open Source
Nearest Neighbor Search Search Engine AI-Assisted
Valkey
Cache Forked Code NoSQL AI-Assisted
2024 Key/Value Open Source
Cache Forked Code NoSQL AI-Assisted
Valthree
2025 — Open Source
VanillaDB
Abandoned Project
2016 Multi-Value Open Source
Abandoned Project
Vearch
Nearest Neighbor Search Search Engine
2019 Document / XML, Vector Open Source
Nearest Neighbor Search Search Engine
vecdb
Nearest Neighbor Search Search Engine MMAP
2026 Document / XML, Vector Open Source
Nearest Neighbor Search Search Engine MMAP
VectorDB
Abandoned Project Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Abandoned Project Nearest Neighbor Search
VectorDB
Nearest Neighbor Search
2023 Document / XML, Vector Open Source
Nearest Neighbor Search
VectorSQL
OLAP Abandoned Project
2020 Relational Open Source
OLAP Abandoned Project
VelarixDB
2024 Key/Value Open Source
Velox
OLAP Query Engine AI-Assisted
2020 Relational Open Source
OLAP Query Engine AI-Assisted
VeloxDB
OLTP
2022 Object-Oriented Open Source
OLTP
Venice
AI-Assisted
2014 Document / XML Open Source
AI-Assisted
VennDB
2023 Relational Open Source
VertexDB
Abandoned Project
2009 Graph Open Source
Abandoned Project
Vespa
Search Engine AI-Assisted
1997 Document / XML Open Source
Search Engine AI-Assisted
VictoriaMetrics
Time-Series AI-Assisted
2018 Column Family / Wide-Column Open Source
Time-Series AI-Assisted
VillageSQL
Forked Code OLTP Revival Project AI-Assisted
2025 Relational Open Source
Forked Code OLTP Revival Project AI-Assisted
Vitess
Middleware AI-Assisted
2011 Relational Open Source
Middleware AI-Assisted
ViyaDB
OLAP Abandoned Project
2017 Relational Open Source
OLAP Abandoned Project
voidDB
OLTP MMAP
2024 Key/Value Open Source
OLTP MMAP
Voldemort
Abandoned Project NoSQL
2009 Key/Value Open Source
Abandoned Project NoSQL
vsql
2021 Relational Open Source
vyhodb
Abandoned Project
2012 Network Open Source
Abandoned Project
WarehousePG
Forked Code AI-Assisted
2025 Relational Open Source
Forked Code AI-Assisted
Warp 10
Time-Series
2013 — Open Source
Time-Series
Weaviate
Nearest Neighbor Search Search Engine MMAP AI-Assisted
2016 Vector Open Source
Nearest Neighbor Search Search Engine MMAP AI-Assisted
WebScaleSQL
Forked Code Abandoned Project
2014 Relational Open Source
Forked Code Abandoned Project
WhiteDB
Abandoned Project
2008 Network Open Source
Abandoned Project
WiredTiger
Acquired Company AI-Assisted
2008 Key/Value Open Source
Acquired Company AI-Assisted
WonderDB
Abandoned Project OLTP
2013 Relational Open Source
Abandoned Project OLTP
XAP
2000 Key/Value Open Source
Xapian
Search Engine
2001 Document / XML Open Source
Search Engine
Xodus
2014 Document / XML Open Source
XTDB
AI-Assisted
2018 Document / XML Open Source
AI-Assisted
YantrikDB
AI-Assisted
2026 — Open Source
AI-Assisted
YaraDB
2025 Document / XML Open Source
YDB
NewSQL OLTP AI-Assisted
2014 Relational Open Source
NewSQL OLTP AI-Assisted
YottaDB
NoSQL
2001 Key/Value Open Source
NoSQL
YouTrackDB
Forked Code AI-Assisted
2024 Graph Open Source
Forked Code AI-Assisted
YTsaurus
AI-Assisted
2010 — Open Source
AI-Assisted
YugabyteDB
Forked Code OLTP AI-Assisted
2016 Key/Value, Relational Open Source
Forked Code OLTP AI-Assisted
Zentropy
2025 Key/Value Open Source
ZeptoDB
Time-Series AI-Assisted
2026 — Open Source
Time-Series AI-Assisted
ZeroDB
Abandoned Project
2015 Document / XML Open Source
Abandoned Project
ZODB
2002 Object-Oriented Open Source
ZooDB
Abandoned Project
2008 Object-Oriented Open Source
Abandoned Project
Zookeeper
2008 Hierarchical Open Source
Zu
Cache
2025 Key/Value Open Source
Cache