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Databases from United States of America

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	1010data OLAP	2000	Relational	US	OLAP
	Access	1992	Relational	US
	Accumulo NoSQL	2008	Column Family / Wide-Column	US	NoSQL
	Adaptive Server Enterprise Acquired Company	1987	Relational	US	Acquired Company
	Advantage Database Server xBase Acquired Company	1993	Relational	US	xBase Acquired Company
	Aerospike NoSQL AI-Assisted	2009	Document / XML, Key-Value, Vector	US	NoSQL AI-Assisted
	AgensGraph Forked Code Multi-Model Acquired Company	2013	Document / XML, Graph, Key-Value, Relational	US	Forked Code Multi-Model Acquired Company
	Akiban Acquired Company Abandoned	2009	—	US	Acquired Company Abandoned
	Akutan Abandoned	2019	Triplestore / RDF	US	Abandoned
AL	AlchemyDB Acquired Company Abandoned	2010	Relational	US	Acquired Company Abandoned
	Alenka Abandoned	2012	Relational	US	Abandoned
	Algebraix	2009	—	US
AL	Allbase/SQL	—	—	US
	AllegroGraph	2004	Triplestore / RDF	US
	AlloyDB OLAP Forked Code OLTP	2022	Relational	US	OLAP Forked Code OLTP
	Altinity Forked Code AI-Assisted Hosting Service	2017	—	US	Forked Code AI-Assisted Hosting Service
	AncelusDB	1983	Entity-Relationship	US
	Antfly Search Engine	2026	Graph, Vector	US	Search Engine
	AnzoGraph	2007	Graph	US
	Apollo xBase	1999	—	US	xBase
AP	Apollo	2014	Document / XML	US
	Approach Acquired Company Abandoned	1991	Relational	US	Acquired Company Abandoned
	AresDB OLAP Abandoned	2018	Relational	US	OLAP Abandoned
	Arroyo Acquired Company Streaming	2023	Relational	US	Acquired Company Streaming
AS	Asami Abandoned	2018	Graph	US	Abandoned
	Assassin Abandoned Peer-to-Peer	2020	Key-Value	US	Abandoned Peer-to-Peer
	Aster Data OLAP Acquired Company	2005	Relational	US	OLAP Acquired Company
	AsterixDB OLAP AI-Assisted	2009	Document / XML	US	OLAP AI-Assisted
	Atlas Time-Series AI-Assisted	2014	—	US	Time-Series AI-Assisted
	AtomicDB Failed Company	2011	Object-Oriented	US	Failed Company
	Aurora	2014	Relational	US
	Aurora DSQL Serverless OLTP	2023	Relational	US	Serverless OLTP
	AverageDB Parody / Joke	2024	Document / XML	US	Parody / Joke
	Axibase Time-Series Failed Company	2004	—	US	Time-Series Failed Company
	Axion Abandoned	2002	Relational	US	Abandoned
	Azure SQL Database Hosting Service	2009	Relational	US	Hosting Service
	BadgerDB AI-Assisted	2017	Key-Value	US	AI-Assisted
	Basic	2023	Document / XML	US
	BASIS	—	Relational	US
	BayesDB Abandoned	2015	—	US	Abandoned
BB	bbolt Forked Code Revival Project	2017	Key-Value	US	Forked Code Revival Project
	Beagle SQL Abandoned	1996	Relational	US	Abandoned
	Bedrock Blockchain OLTP AI-Assisted	2016	Relational	US	Blockchain OLTP AI-Assisted
	BemiDB	2024	Relational	US
	Beringei Time-Series Abandoned	2015	Key-Value	US	Time-Series Abandoned
	Berkeley DB Acquired Company OLTP DBM	1994	Document / XML, Key-Value	US	Acquired Company OLTP DBM
	BigQuery OLAP Serverless	2010	Document / XML, Relational	US	OLAP Serverless
	Bitsy	2013	Graph	US
	BitYota Acquired Company	2011	Relational	US	Acquired Company
	Blazegraph Acquired Company Abandoned	2006	Graph, Triplestore / RDF	US	Acquired Company Abandoned
	Bleve Search Engine AI-Assisted	2014	Document / XML, Vector	US	Search Engine AI-Assisted
	BlinkDB Abandoned	2012	Relational	US	Abandoned
	Blueflood Time-Series Abandoned	2013	Column Family / Wide-Column	US	Time-Series Abandoned
	BoltDB Abandoned	2013	Key-Value	US	Abandoned
	BonsaiDb Abandoned	2021	Key-Value	US	Abandoned
	BTrDB Abandoned	2014	Relational	US	Abandoned
	Btrieve Acquired Company	1982	Network	US	Acquired Company
BU	Bubba Abandoned	1988	Object-Oriented	US	Abandoned
	bugfruit Abandoned	2022	Key-Value	US	Abandoned
	BuntDB OLTP	2016	Key-Value	US	OLTP
	BusTub	2019	Relational	US
	Caché	1997	Array / Matrix	US
CA	Calvin Abandoned	2012	Relational	US	Abandoned
	CapyDB Nearest Neighbor	2024	Document / XML	US	Nearest Neighbor
	Cassandra NoSQL AI-Assisted	2008	Key-Value, Column Family / Wide-Column	US	NoSQL AI-Assisted
	Cayley Abandoned	2014	Triplestore / RDF	US	Abandoned
CD	cdb Immutable	1996	Key-Value	US	Immutable
	Cedalio Blockchain	2022	Document / XML	US	Blockchain
	CheetahDB	2018	Relational	US
	Chroma Nearest Neighbor AI-Assisted	2022	Document / XML	US	Nearest Neighbor AI-Assisted
	ClearDB Acquired Company	2010	Relational	US	Acquired Company
	Cloudant Acquired Company OLTP NoSQL	2008	Document / XML	US	Acquired Company OLTP NoSQL
	Cloud BigTable	2005	Column Family / Wide-Column	US
	Cloud Datastore NoSQL	2013	Document / XML	US	NoSQL
	Cloud Firestore Serverless	2017	Document / XML	US	Serverless
	CloudKit Abandoned	2008	Document / XML	US	Abandoned
	Cloud Memorystore Cache Hosting Service	—	—	US	Cache Hosting Service
CL	CloudSearch Search Engine	2012	Document / XML	US	Search Engine
	Cloud Spanner NewSQL	2007	—	US	NewSQL
	Cloud SQL Hosting Service	2012	Relational	US	Hosting Service
	Clustrix NewSQL Acquired Company OLTP	2006	Relational	US	NewSQL Acquired Company OLTP
	CockroachDB NewSQL OLTP AI-Assisted	2014	Relational	US	NewSQL OLTP AI-Assisted
	Coherence Cache Acquired Company	2000	Object-Oriented	US	Cache Acquired Company
	Comdb2 AI-Assisted	2004	Relational	US	AI-Assisted
	CompleteDB Abandoned OLTP	2012	Relational	US	Abandoned OLTP
	ComputeDB OLAP Acquired Company Abandoned	2015	Relational	US	OLAP Acquired Company Abandoned
	Concourse	2012	Document / XML	US
	Consus Abandoned	2015	Key-Value	US	Abandoned
CO	CORAL	1988	—	US
	CornerStone Acquired Company	1985	Relational	US	Acquired Company
	Cosmos DB	2015	Key-Value, Graph, Column Family / Wide-Column	US
	Couchbase NoSQL	2010	Key-Value, Document / XML	US	NoSQL
	CouchDB NoSQL	2005	Document / XML	US	NoSQL
CQ	CQL++ Failed Company	1994	Relational	US	Failed Company
	CrowdDB	2011	Relational	US
	CruzDB	2016	—	US
	C-Store Abandoned	2005	Relational	US	Abandoned
	Cubrick	2016	Column Family / Wide-Column	US
	D3 Acquired Company	1999	Relational	US	Acquired Company
	dashDB Hosting Service	2014	—	US	Hosting Service
DA	DataBlitz OLTP	1993	Relational	US	OLTP
	DataEase Acquired Company OLTP	1981	Relational	US	Acquired Company OLTP
	DataFusion Query Engine AI-Assisted	2016	Relational	US	Query Engine AI-Assisted
	Datalevin	2020	Document / XML	US
	DATAllegro OLAP Acquired Company	2003	Relational	US	OLAP Acquired Company
	Datameer	2009	—	US
	Datascope	1996	Relational	US
	DataStax	2010	—	US
	Dataupia Failed Company	2005	Relational	US	Failed Company
	Datomic Acquired Company	2012	Key-Value	US	Acquired Company
	Db2	1983	Document / XML, Relational	US
	DB4IoT	2016	Document / XML	US
	db4o Acquired Company Abandoned	2000	Object-Oriented	US	Acquired Company Abandoned
	DB9 Serverless OLTP	2026	Relational	US	Serverless OLTP
	dBASE xBase	1979	Relational	US	xBase
	DBIX	1996	—	US
DB	DBMS-20	—	Network	US
DB	DBOMP	1968	Hierarchical	US
	DBx1000 Abandoned	2014	Relational	US	Abandoned
	DeepDB Abandoned Failed Company	2010	Relational	US	Abandoned Failed Company
	Delta Lake AI-Assisted	2019	Column Family / Wide-Column	US	AI-Assisted
	Derby Acquired Company Abandoned OLTP	1997	Relational	US	Acquired Company Abandoned OLTP
	DeviceSQL Streaming	1998	Relational	US	Streaming
	DGraph Acquired Company AI-Assisted	2015	Graph	US	Acquired Company AI-Assisted
DI	DIRECT OLTP	1978	Relational	US	OLTP
	DMSII	1972	Network	US
	DocumentDB Middleware NoSQL AI-Assisted	2023	Document / XML	US	Middleware NoSQL AI-Assisted
	DocumentDB	2019	Document / XML	US
	Dolt Versioning AI-Assisted	2018	Relational	US	Versioning AI-Assisted
	Dremio OLAP Query Engine Acquired Company Data Lake	2015	Relational	US	OLAP Query Engine Acquired Company Data Lake
DR	DriftDB Immutable AI-Assisted	2025	Relational	US	Immutable AI-Assisted
	Drill OLAP AI-Assisted	2012	Column Family / Wide-Column	US	OLAP AI-Assisted
	Drizzle Forked Code Abandoned	2008	Relational	US	Forked Code Abandoned
	Druid OLAP AI-Assisted	2011	Column Family / Wide-Column	US	OLAP AI-Assisted
	DynamoDB OLTP NoSQL	2012	Document / XML, Key-Value	US	OLTP NoSQL
	DynomiteDB Cache Abandoned Middleware	2012	Key-Value	US	Cache Abandoned Middleware
	Earthstar Abandoned Peer-to-Peer	2020	Document / XML	US	Abandoned Peer-to-Peer
	EasyDB Failed Company	2019	Document / XML	US	Failed Company
	Edis Abandoned NoSQL	2010	Key-Value	US	Abandoned NoSQL
	EffiProz Abandoned	—	Relational	US	Abandoned
	Ehcache Cache Acquired Company	2003	Key-Value	US	Cache Acquired Company
	EinsteinDB Abandoned	2019	Key-Value	US	Abandoned
	ekoDB	2024	Document / XML	US
	Elasticsearch Search Engine NoSQL AI-Assisted	2004	Document / XML	US	Search Engine NoSQL AI-Assisted
	ElephantDB Abandoned	2011	Key-Value	US	Abandoned
	ElevateDB	2006	Relational	US
EN	Encompass	1981	Relational	US
	Endeca OLAP Acquired Company	1999	Document / XML	US	OLAP Acquired Company
	Epsilla Nearest Neighbor	2023	Array / Matrix	US	Nearest Neighbor
	EraDB Acquired Company	2019	Document / XML	US	Acquired Company
	EsgynDB Failed Company	2015	Relational	US	Failed Company
	Espresso	2011	Document / XML	US
	Essbase OLAP Acquired Company	1992	Array / Matrix	US	OLAP Acquired Company
	etcd Acquired Company	2013	Key-Value	US	Acquired Company
	EVA DB Abandoned	2018	Relational	US	Abandoned
	EVCache Cache	2012	Key-Value	US	Cache
	Express Acquired Company	1970	Array / Matrix	US	Acquired Company
	ExtendDB Middleware AI-Assisted	2026	Key-Value, Document / XML	US	Middleware AI-Assisted
EX	Extensible Storage Engine	1994	Key-Value	US
	eXtremeDB Cache Time-Series OLTP Middleware	2001	Key-Value, Entity-Relationship, Relational, Column Family / Wide-Column	US	Cache Time-Series OLTP Middleware
	eyros Time-Series Abandoned	2018	Array / Matrix	US	Time-Series Abandoned
	FairCom DB	1984	—	US
	Falcon Abandoned	2006	—	US	Abandoned
	FASTER	2018	Key-Value	US
	FatDB Cache Failed Company NoSQL	2012	Key-Value	US	Cache Failed Company NoSQL
	FathomDB Acquired Company Hosting Service	2009	—	US	Acquired Company Hosting Service
	FaunaDB Serverless Failed Company	2012	Document / XML, Graph, Key-Value, Relational	US	Serverless Failed Company
	FeatureBase Abandoned Search Engine	2017	Relational	US	Abandoned Search Engine
	FeatureForm Acquired Company Abandoned Nearest Neighbor	2020	Vector	US	Acquired Company Abandoned Nearest Neighbor
	FerretDB AI-Assisted	2021	Document / XML	US	AI-Assisted
	FileMaker Acquired Company	1985	Relational	US	Acquired Company
	FiloDB	2015	—	US
	FinchDB	2015	Document / XML	US
	Firebase Acquired Company NoSQL	2011	Document / XML	US	Acquired Company NoSQL
	Firebird AI-Assisted	2000	Relational	US	AI-Assisted
	FirstSQL/J Failed Company	2001	Relational	US	Failed Company
FL	FleetDB Abandoned	2009	Document / XML	US	Abandoned
FL	FlockDB Abandoned	2010	Graph	US	Abandoned
	Fluree Blockchain AI-Assisted	2017	Document / XML, Graph, Triplestore / RDF, Relational	US	Blockchain AI-Assisted
FO	Fongo Abandoned NoSQL	2012	Document / XML	US	Abandoned NoSQL
FO	ForestDB Abandoned	2013	Key-Value	US	Abandoned
	FoundationDB Acquired Company OLTP AI-Assisted	2009	Key-Value	US	Acquired Company OLTP AI-Assisted
	FoxPro xBase Acquired Company	1984	Relational	US	xBase Acquired Company
	FramerD	1996	Object-Oriented	US
	FrostDB Time-Series	2022	Column Family / Wide-Column	US	Time-Series
GA	Gadfly Abandoned	1994	Relational	US	Abandoned
	Gaia Abandoned Failed Company	2020	Object-Oriented	US	Abandoned Failed Company
GA	Gamma OLAP Abandoned OLTP	1986	Relational	US	OLAP Abandoned OLTP
	Garnet Cache AI-Assisted	2021	Key-Value	US	Cache AI-Assisted
	GDBM DBM	1990	Key-Value	US	DBM
	GemStone/S	1986	Object-Oriented	US
	GenieDB Failed Company Hosting Service	2008	Relational	US	Failed Company Hosting Service
	GenomicsDB Abandoned	2016	Array / Matrix	US	Abandoned
	Geode Cache Forked Code OLTP NoSQL	2015	Key-Value	US	Cache Forked Code OLTP NoSQL
	GlareDB Abandoned Middleware AI-Assisted	2022	Relational	US	Abandoned Middleware AI-Assisted
	GlobalsDB	2011	Array / Matrix	US
GO	GOLD STAR	1970	—	US
GO	Google F1	2013	Relational	US
	Graphik Abandoned	2020	Document / XML	US	Abandoned
GR	GraphLite	2025	Graph	US
	Greenplum OLAP Forked Code Acquired Company	2003	Relational	US	OLAP Forked Code Acquired Company
	GridGain Acquired Company	2007	Key-Value	US	Acquired Company
	GT.M Acquired Company OLTP NoSQL	1986	Key-Value	US	Acquired Company OLTP NoSQL
	GUN Peer-to-Peer	2014	Graph	US	Peer-to-Peer
	Hadapt OLAP Acquired Company Middleware	2009	Relational	US	OLAP Acquired Company Middleware
	Hadoop OLAP AI-Assisted	2006	—	US	OLAP AI-Assisted
HA	HaloDB Abandoned	2017	Key-Value	US	Abandoned
HA	HaloDB Revive Forked Code Revival Project	2017	Key-Value	US	Forked Code Revival Project
	HarperDB Serverless NoSQL	2017	Document / XML	US	Serverless NoSQL
	HAWQ OLAP Abandoned Middleware	2015	Relational	US	OLAP Abandoned Middleware
HA	HaystackDB Abandoned Nearest Neighbor MMAP	2024	Vector	US	Abandoned Nearest Neighbor MMAP
	Hazelcast Cache	2008	Key-Value	US	Cache
	HBase NoSQL	2007	Column Family / Wide-Column	US	NoSQL
	HeavyDB Abandoned	2013	Relational	US	Abandoned
	Hekaton OLTP	2012	Relational	US	OLTP
	Helium Failed Company	2017	Key-Value	US	Failed Company
	HelixDB OLTP Nearest Neighbor AI-Assisted	2024	Vector, Graph	US	OLTP Nearest Neighbor AI-Assisted
	HighContext Serverless	2023	Key-Value	US	Serverless
HI	hipsterDB Parody / Joke Abandoned	2013	Key-Value	US	Parody / Joke Abandoned
	Histore Abandoned	2018	Key-Value	US	Abandoned
	Hive OLAP AI-Assisted	2010	Relational	US	OLAP AI-Assisted
HO	HorizonDB Geospatial	2025	Document / XML	US	Geospatial
	hss.db	2009	Relational	US
	H-Store NewSQL Abandoned OLTP	2006	Relational	US	NewSQL Abandoned OLTP
	Husky Time-Series	2020	Document / XML	US	Time-Series
	HyperDB Parody / Joke Abandoned Nearest Neighbor	2023	Document / XML, Vector	US	Parody / Joke Abandoned Nearest Neighbor
	HyperDex Abandoned NoSQL	2011	Key-Value	US	Abandoned NoSQL
	HyperGraphDB Abandoned	2007	Graph	US	Abandoned
	HyperSQL	2001	Relational	US
	Hypertable Acquired Company Abandoned	2008	Column Family / Wide-Column	US	Acquired Company Abandoned
	IDMS	1973	Network	US
	Ignite	2014	Key-Value	US
	Illustra Acquired Company OLTP	1992	Relational	US	Acquired Company OLTP
	ImmortalDB Web Browser Abandoned	2018	Key-Value	US	Web Browser Abandoned
	Immudb Immutable AI-Assisted	2019	Key-Value	US	Immutable AI-Assisted
	Impala OLAP AI-Assisted	2013	Relational	US	OLAP AI-Assisted
	IMS OLTP	1966	Hierarchical	US	OLTP
	IndraDB	2016	Graph	US
	InfiniDB OLAP Abandoned Failed Company	2000	Relational	US	OLAP Abandoned Failed Company
	Infinispan Cache	2009	Key-Value	US	Cache
	InfiniSQL Abandoned OLTP	2013	Relational	US	Abandoned OLTP
	InfiniteGraph	2010	Graph	US
	InfinityDB	2002	Key-Value, Graph, Array / Matrix, Hierarchical, Relational	US
	Infino Query Engine Nearest Neighbor MMAP	—	Relational	US	Query Engine Nearest Neighbor MMAP
	InfluxDB Time-Series AI-Assisted	2013	Column Family / Wide-Column	US	Time-Series AI-Assisted
	InfoGrid Abandoned	2008	Graph	US	Abandoned
	Informix Acquired Company	1980	Relational	US	Acquired Company
	Ingres Acquired Company	1974	Relational	US	Acquired Company
	Instant Serverless NoSQL Hosting Service	2022	Relational	US	Serverless NoSQL Hosting Service
	InstantDB Failed Company	1997	Relational	US	Failed Company
IN	Integrated Data Store	1964	Network	US
	InterBase Versioning Acquired Company	1984	Relational	US	Versioning Acquired Company
	IQ Acquired Company	1992	Relational	US	Acquired Company
IR	IRIS	—	—	US
	ITTIA DB Time-Series OLTP	2000	Relational	US	Time-Series OLTP
	JaguarDB Nearest Neighbor	2017	Array / Matrix, Key-Value	US	Nearest Neighbor
	JanusGraph Acquired Company	2012	Graph	US	Acquired Company
	Jazz AI-Assisted	2026	Relational	US	AI-Assisted
	JuliaDB Abandoned	2017	Relational	US	Abandoned
JU	JunoDB Abandoned NoSQL	—	Key-Value	US	Abandoned NoSQL
KA	KahaDB	—	—	US
	KairosDB Time-Series	2013	Relational	US	Time-Series
KA	KarelDB Abandoned	2019	Relational	US	Abandoned
	Kdb+ Acquired Company	1998	Relational	US	Acquired Company
	KenobiDB Abandoned Middleware	2019	Document / XML	US	Abandoned Middleware
	Kerf	2014	—	US
	Kinetica OLAP	2009	Relational	US	OLAP
	KirbyBase Abandoned	2003	—	US	Abandoned
	KitaroDB	2012	Key-Value	US
KR	Krati Abandoned OLTP NoSQL	2010	Key-Value	US	Abandoned OLTP NoSQL
	Kronicler Time-Series	2025	Relational	US	Time-Series
	ksqlDB Streaming AI-Assisted	2017	Key-Value, Relational	US	Streaming AI-Assisted
	Kudu OLTP	2016	Relational	US	OLTP
	KVdb NoSQL	2018	Key-Value	US	NoSQL
	LadybugDB Forked Code Revival Project AI-Assisted	2025	Graph	US	Forked Code Revival Project AI-Assisted
	lakeql Query Engine AI-Assisted	2026	Relational	US	Query Engine AI-Assisted
	LanceDB Search Engine AI-Assisted	2023	Document / XML	US	Search Engine AI-Assisted
	LesbianDB Abandoned	2022	Document / XML	US	Abandoned
	LevelDB MMAP	2011	Key-Value	US	MMAP
	libSQL Forked Code OLTP	2022	Relational	US	Forked Code OLTP
	LightDB Abandoned	2017	Array / Matrix	US	Abandoned
	LintDB Abandoned Nearest Neighbor	2024	Vector	US	Abandoned Nearest Neighbor
	LocalSQL	2001	Relational	US
	LocustDB Abandoned	2017	Relational	US	Abandoned
	LogicBlox Acquired Company	—	—	US	Acquired Company
	Lovefield Web Browser Abandoned	2014	Relational	US	Web Browser Abandoned
	Lucene Search Engine MMAP AI-Assisted	1999	Document / XML	US	Search Engine MMAP AI-Assisted
	LucidDB OLAP Abandoned	2004	Relational	US	OLAP Abandoned
	M3DB Time-Series AI-Assisted	2018	Relational	US	Time-Series AI-Assisted
	Magma	2002	Object-Oriented	US
	MangoDB Parody / Joke Abandoned NoSQL	2012	Document / XML	US	Parody / Joke Abandoned NoSQL
MA	Manhattan	2014	—	US
	MapR-DB Acquired Company	2012	Column Family / Wide-Column	US	Acquired Company
	Mariposa	1994	Relational	US
	MarkLogic Acquired Company	2001	Document / XML, Triplestore / RDF	US	Acquired Company
	Materialize Streaming AI-Assisted	2019	Relational	US	Streaming AI-Assisted
MC	mcdb Abandoned Immutable MMAP	2010	Key-Value	US	Abandoned Immutable MMAP
	Mckoi SQL Database Abandoned Failed Company	1998	Relational	US	Abandoned Failed Company
MD	MDBM Abandoned	2012	Key-Value	US	Abandoned
	Memcached Cache	2003	Key-Value	US	Cache
	Mentat Abandoned	2016	Relational	US	Abandoned
	MenteDB AI-Assisted	2026	Vector, Graph	US	AI-Assisted
	MetalBase Abandoned	—	Relational	US	Abandoned
	mnestic Forked Code Revival Project AI-Assisted	2026	Relational	US	Forked Code Revival Project AI-Assisted
MO	Model 204 Acquired Company	1965	Entity-Attribute-Value	US	Acquired Company
	ModeShape Abandoned	2008	Object-Oriented	US	Abandoned
	Mondrian OLAP Acquired Company	2002	Relational	US	OLAP Acquired Company
	MongoDB NoSQL AI-Assisted	2009	Document / XML	US	NoSQL AI-Assisted
	Mongrel Serverless Failed Company	2021	Key-Value	US	Serverless Failed Company
	MotherDuck Hosting Service	2022	Relational	US	Hosting Service
MU	MUFFIN	1979	Relational	US
	Mulgara Abandoned	2006	Triplestore / RDF	US	Abandoned
	Multigres Middleware AI-Assisted	2025	Relational	US	Middleware AI-Assisted
MU	MuopDB Nearest Neighbor MMAP	2024	Vector	US	Nearest Neighbor MMAP
MU	Mussel NewSQL	2022	Key-Value	US	NewSQL
	mvBase Acquired Company	—	Multi-Value	US	Acquired Company
	NamiDB NoSQL	2026	Graph	US	NoSQL
	Napa	2018	Relational	US
	NCache Cache	2015	Key-Value	US	Cache
	Neon Serverless Forked Code Acquired Company OLTP	2021	Relational	US	Serverless Forked Code Acquired Company OLTP
NE	Neoview Abandoned	2007	Relational	US	Abandoned
	Neptune	2018	Graph, Triplestore / RDF	US
	Netezza OLAP Acquired Company	1999	Relational	US	OLAP Acquired Company
	Netlify Database Serverless Hosting Service	2024	Relational	US	Serverless Hosting Service
	Nile OLTP	2022	Relational	US	OLTP
	Ninja Database	—	Object-Oriented, Relational	US
	NoisePage	2018	Relational	US
	Noms Versioning Abandoned	2015	Document / XML	US	Versioning Abandoned
	NonStop SQL Acquired Company OLTP	1987	Relational	US	Acquired Company OLTP
	NornicDB Nearest Neighbor AI-Assisted	2025	Graph	US	Nearest Neighbor AI-Assisted
	NosDB Abandoned	2013	Document / XML	US	Abandoned
	NoSQL Object Database Acquired Company NoSQL	1988	Object-Oriented	US	Acquired Company NoSQL
	NuDB Abandoned	2016	Key-Value	US	Abandoned
	Numstore Query Engine	2026	Array / Matrix	US	Query Engine
	NuoDB NewSQL Acquired Company	2010	Relational	US	NewSQL Acquired Company
	OasysDB Abandoned Nearest Neighbor	2023	Key-Value, Vector	US	Abandoned Nearest Neighbor
	Objectivity/DB	1990	Object-Oriented	US
	ObjectStore Acquired Company	1988	Object-Oriented	US	Acquired Company
	Ocient	2016	Relational	US
	OlegDB MMAP NoSQL	2014	Key-Value	US	MMAP NoSQL
	OneDB	2020	Relational	US
	OpenBase SQL Failed Company	1991	Relational	US	Failed Company
	OpenEdge OLTP	1984	Relational	US	OLTP
	OpenSearch Forked Code Search Engine AI-Assisted	2021	Document / XML	US	Forked Code Search Engine AI-Assisted
	OpenTSDB Time-Series Abandoned	2010	Key-Value	US	Time-Series Abandoned
	Oracle Multi-Model	1977	Document / XML, Graph, Key-Value, Relational, Triplestore / RDF	US	Multi-Model
	Oracle NoSQL NoSQL	2011	Key-Value	US	NoSQL
	Oxia AI-Assisted	2021	Key-Value	US	AI-Assisted
PA	PalDB Abandoned	2015	Key-Value	US	Abandoned
	PancakeDB	2021	—	US
	ParAccel OLAP Acquired Company	2006	Relational	US	OLAP Acquired Company
	ParadeDB OLAP Nearest Neighbor Search Engine AI-Assisted	2023	Relational	US	OLAP Nearest Neighbor Search Engine AI-Assisted
PA	Paradise	1994	Object-Oriented	US
	Paradox Acquired Company Abandoned	1985	Relational	US	Acquired Company Abandoned
	Pebble AI-Assisted	2018	Key-Value	US	AI-Assisted
	Percona Server Forked Code	2006	Relational	US	Forked Code
	Pervasive PSQL Acquired Company	1996	Key-Value, Relational	US	Acquired Company
	Phoenix Middleware AI-Assisted	2014	Relational	US	Middleware AI-Assisted
PI	PI Time-Series Acquired Company	1980	Hierarchical, Relational	US	Time-Series Acquired Company
	pickleDB	2011	Document / XML	US
	Pilosa Abandoned	2017	Vector	US	Abandoned
	Pinecone Nearest Neighbor Search Engine	2019	Vector	US	Nearest Neighbor Search Engine
	Pinot OLAP AI-Assisted	2014	Relational	US	OLAP AI-Assisted
	PipelineDB Acquired Company Abandoned Streaming	2013	Relational	US	Acquired Company Abandoned Streaming
	PlanetScale Forked Code OLTP	2018	Relational	US	Forked Code OLTP
PN	PNUTS Abandoned OLTP NoSQL	2008	Key-Value	US	Abandoned OLTP NoSQL
	pocketSQL Abandoned	2001	Relational	US	Abandoned
	Pogocache Cache	2025	Key-Value	US	Cache
	Pogreb MMAP	2018	Key-Value	US	MMAP
	PointBase Acquired Company	1998	Relational	US	Acquired Company
	Polybase Blockchain	2022	Document / XML	US	Blockchain
	PostgreSQL OLTP	1986	Relational	US	OLTP
	PouchDB Web Browser NoSQL	2010	Document / XML	US	Web Browser NoSQL
	Predator	1996	Relational	US
	PrestoDB OLAP AI-Assisted	2013	Document / XML, Key-Value, Column Family / Wide-Column, Relational	US	OLAP AI-Assisted
	Proton Streaming AI-Assisted	2021	Relational	US	Streaming AI-Assisted
	QLDB Abandoned Blockchain	2018	Document / XML	US	Abandoned Blockchain
	Qserv AI-Assisted	2011	Relational	US	AI-Assisted
	Quadcap Embeddable Database Failed Company	1999	Relational	US	Failed Company
QU	Quickbase Abandoned	1993	Relational	US	Abandoned
	Quickstep OLAP Abandoned	2013	Relational	US	OLAP Abandoned
	Quickwit Acquired Company Search Engine AI-Assisted	2021	Document / XML	US	Acquired Company Search Engine AI-Assisted
	QuineDB	2016	Key-Value	US
	Quokka OLAP Abandoned	2021	Relational	US	OLAP Abandoned
	RageDB Abandoned	2021	Graph	US	Abandoned
	RaimaDB Time-Series	1984	Network, Relational	US	Time-Series
	RaptorDB Forked Code	2024	Relational	US	Forked Code
	R:BASE Acquired Company	1981	Relational	US	Acquired Company
	/rdb Abandoned	1984	Relational	US	Abandoned
RD	RDBMS	1974	Relational	US
	Rdb/VMS Acquired Company	1984	Relational	US	Acquired Company
	ReadySet Cache Middleware AI-Assisted	2020	Relational	US	Cache Middleware AI-Assisted
	Realm Acquired Company Abandoned Mobile	2011	Object-Oriented	US	Acquired Company Abandoned Mobile
	redb OLTP AI-Assisted	2018	Key-Value	US	OLTP AI-Assisted
	Red Brick OLAP Acquired Company	1990	Relational	US	OLAP Acquired Company
	Redcon	2016	Key-Value	US
	RedisGraph Abandoned	2018	Graph	US	Abandoned
	RedoxQL	2024	Relational	US
	Redshift OLAP Serverless	2012	Relational	US	OLAP Serverless
	Redwood Abandoned Peer-to-Peer	2019	Key-Value	US	Abandoned Peer-to-Peer
	RelationalAI	2018	Graph, Relational	US
	RelationalCloud Abandoned	2010	Relational	US	Abandoned
	Relational Database Service Hosting Service	2009	—	US	Hosting Service
	ResilientDB Blockchain	2019	Document / XML	US	Blockchain
	Resin Cache Cache Middleware	1998	Key-Value	US	Cache Middleware
	RethinkDB Failed Company NoSQL	2009	Document / XML	US	Failed Company NoSQL
	RexDB Acquired Company	2006	Relational	US	Acquired Company
	RhizomeDB Abandoned Peer-to-Peer	2022	Relational	US	Abandoned Peer-to-Peer
	Riak Abandoned Failed Company NoSQL	2010	Key-Value	US	Abandoned Failed Company NoSQL
RI	Riffle Abandoned Immutable	2014	—	US	Abandoned Immutable
	RisingLight	2021	Relational	US
	RisingWave Streaming AI-Assisted	2021	Relational	US	Streaming AI-Assisted
	RocksDB Forked Code OLTP	2012	Key-Value	US	Forked Code OLTP
	Rockset OLAP Acquired Company	2016	Relational	US	OLAP Acquired Company
	Rosebase Failed Company	1992	Relational	US	Failed Company
	rqlite AI-Assisted	2014	Relational	US	AI-Assisted
	RudraDB Nearest Neighbor	2025	Document / XML, Vector	US	Nearest Neighbor
	Rya Abandoned Middleware NoSQL	2012	Triplestore / RDF	US	Abandoned Middleware NoSQL
SA	Salvobase AI-Assisted	2026	Document / XML	US	AI-Assisted
	ScalarDB Middleware NoSQL	2018	Relational	US	Middleware NoSQL
	ScaleBase Acquired Company	2009	—	US	Acquired Company
	ScaleDB Failed Company	2005	—	US	Failed Company
	ScaleOut StateServer	2005	Key-Value	US
	SchemafreeSQL	2012	Document / XML	US
	SchemaJS Abandoned NoSQL	2024	Document / XML	US	Abandoned NoSQL
	SchoonerSQL Acquired Company OLTP	2007	Relational	US	Acquired Company OLTP
	SciDB OLAP	2008	Array / Matrix	US	OLAP
	ScratchDB OLAP Abandoned Middleware Hosting Service	2023	Document / XML	US	OLAP Abandoned Middleware Hosting Service
	Scuba	2013	Relational	US
SD	SDD-1	—	—	US
	SearchBlox Search Engine	2003	Document / XML	US	Search Engine
	SenseiDB Abandoned	2012	Relational	US	Abandoned
	Sequins Abandoned	2014	Key-Value	US	Abandoned
	ShareBase Acquired Company	1979	Relational	US	Acquired Company
SH	Shore Abandoned OLTP	1995	Object-Oriented	US	Abandoned OLTP
SH	Shore-MT Forked Code OLTP	2007	Object-Oriented	US	Forked Code OLTP
	Siaqodb Abandoned Failed Company NoSQL	—	Document / XML	US	Abandoned Failed Company NoSQL
SI	Silo Abandoned	2013	Relational	US	Abandoned
	SimpleDB NoSQL	2007	Key-Value	US	NoSQL
	SingleStore OLAP NewSQL Acquired Company OLTP	2011	Document / XML, Key-Value, Multi-Value, Object-Oriented, Relational, Vector	US	OLAP NewSQL Acquired Company OLTP
	Sirius OLAP Query Engine AI-Assisted	2024	Relational	US	OLAP Query Engine AI-Assisted
	SKDB OLTP AI-Assisted	2022	Relational	US	OLTP AI-Assisted
	Sklad NoSQL	2024	Key-Value	US	NoSQL
SK	SkyDB	2013	—	US
	Skytable Abandoned NoSQL	2020	Key-Value	US	Abandoned NoSQL
	SlateDB AI-Assisted	2024	Key-Value	US	AI-Assisted
SL	Slumber DB Abandoned	2014	Key-Value	US	Abandoned
SM	SmithDB OLAP	2026	—	US	OLAP
	Sneller	2022	Document / XML	US
	Snowflake OLAP	2013	Document / XML, Relational	US	OLAP
	SochDB AI-Assisted	2026	Graph, Relational, Vector	US	AI-Assisted
	Solr Search Engine NoSQL AI-Assisted	2004	Document / XML	US	Search Engine NoSQL AI-Assisted
SO	Sonnerie Time-Series	—	Relational	US	Time-Series
	SpacetimeDB OLTP AI-Assisted	2023	Relational	US	OLTP AI-Assisted
	Spark SQL OLAP AI-Assisted	2014	—	US	OLAP AI-Assisted
	SparrowDB AI-Assisted	2026	Graph	US	AI-Assisted
	Sphinx Search Engine	2001	Document / XML	US	Search Engine
	SpiceDB Middleware AI-Assisted	2021	Object-Oriented	US	Middleware AI-Assisted
	Splice Machine Abandoned Failed Company	2012	Relational	US	Abandoned Failed Company
	SplinterDB NoSQL	2018	Key-Value	US	NoSQL
	Splunk Acquired Company Search Engine	2002	Key-Value	US	Acquired Company Search Engine
	SQLBase Acquired Company	1984	Relational	US	Acquired Company
SQ	SQL/DS	1981	Relational	US
	SQLflex	—	Relational	US
	SQLite OLTP	2000	Relational	US	OLTP
	SQL Server	1988	Relational	US
	Sqrrl Acquired Company NoSQL	2012	Graph, Key-Value	US	Acquired Company NoSQL
SQ	Squirreling Query Engine Web Browser AI-Assisted	2025	Relational	US	Query Engine Web Browser AI-Assisted
	SRCH² Abandoned	2010	—	US	Abandoned
	Stardog	2005	Triplestore / RDF	US
	Stig Abandoned Failed Company	2010	Graph	US	Abandoned Failed Company
	StormDB Acquired Company	2012	Relational	US	Acquired Company
ST	StormiDB Abandoned NoSQL	2024	Document / XML	US	Abandoned NoSQL
	Streambase Acquired Company Streaming	2003	Relational	US	Acquired Company Streaming
	SummitDB Abandoned NoSQL	2016	Key-Value	US	Abandoned NoSQL
	Supra Server SQL Acquired Company OLTP	1989	Relational	US	Acquired Company OLTP
	SwellDB AI-Assisted	2025	Relational	US	AI-Assisted
SY	SylvieJS Web Browser Abandoned	2023	Document / XML	US	Web Browser Abandoned
	SynapCores Multi-Model Nearest Neighbor	2026	Graph, Relational, Vector	US	Multi-Model Nearest Neighbor
	System G	2009	Graph	US
SY	System R OLTP	1972	Relational	US	OLTP
	TabDB Parody / Joke Abandoned	2019	Relational	US	Parody / Joke Abandoned
	TaffyDB Abandoned	2009	Document / XML	US	Abandoned
	Tanzu GemFire Cache Acquired Company NoSQL	2002	Key-Value	US	Cache Acquired Company NoSQL
	TayzGrid Cache	—	Object-Oriented	US	Cache
	Teradata	1979	Document / XML, Graph, Relational	US
	Tesora Acquired Company Middleware	2010	Relational	US	Acquired Company Middleware
	Theseus OLAP Failed Company	2022	Relational	US	OLAP Failed Company
	ThreadDB Abandoned Peer-to-Peer	2019	Document / XML	US	Abandoned Peer-to-Peer
	ThruDB	2006	—	US
	TiDB NewSQL AI-Assisted	2015	Key-Value	US	NewSQL AI-Assisted
	TigerGraph	2012	Graph	US
	Tile38	2016	—	US
	TileDB NoSQL	2014	Array / Matrix	US	NoSQL
	TIMBER	—	Document / XML	US
	TimescaleDB Time-Series AI-Assisted	2017	Relational	US	Time-Series AI-Assisted
	TimesTen Acquired Company OLTP	1996	Relational	US	Acquired Company OLTP
	Timestream	2018	Relational	US
	TinyBase	2021	Relational	US
	Tinybird OLAP Hosting Service	2019	—	US	OLAP Hosting Service
	TinyDB Query Engine Peer-to-Peer	1999	Relational	US	Query Engine Peer-to-Peer
TI	tinySQL xBase Abandoned	2003	Relational	US	xBase Abandoned
	Titan Acquired Company Abandoned	2012	Graph	US	Acquired Company Abandoned
	TokuDB Acquired Company Abandoned	2009	Relational	US	Acquired Company Abandoned
	TokuMX Forked Code Acquired Company Abandoned	2013	Document / XML	US	Forked Code Acquired Company Abandoned
	TonicDB OLTP	2025	Key-Value	US	OLTP
TO	TOTAL	—	—	US
	Trafodion Abandoned	2014	Column Family / Wide-Column	US	Abandoned
	TrailDB Abandoned	2014	Relational	US	Abandoned
	TransLattice NewSQL Failed Company	2007	Relational	US	NewSQL Failed Company
	TreodeDB Abandoned	2012	Key-Value	US	Abandoned
	Trino AI-Assisted	2019	—	US	AI-Assisted
	Truviso Acquired Company Streaming	2006	Relational	US	Acquired Company Streaming
TU	TurboImage	1972	—	US
	Turso OLTP AI-Assisted	2023	Relational	US	OLTP AI-Assisted
	Twig	2009	Object-Oriented	US
	Ultipa OLAP OLTP NoSQL	2019	Graph	US	OLAP OLTP NoSQL
	Unbounded Failed Company	2020	Document / XML	US	Failed Company
	UniSQL Acquired Company	1991	Relational	US	Acquired Company
UN	UniVerse Acquired Company	1984	Multi-Value	US	Acquired Company
	Valkey Cache Forked Code NoSQL AI-Assisted	2024	Key-Value	US	Cache Forked Code NoSQL AI-Assisted
VA	Valthree Cache NoSQL	2025	Key-Value	US	Cache NoSQL
VE	vecdb Nearest Neighbor Search Engine MMAP	2026	Document / XML, Vector	US	Nearest Neighbor Search Engine MMAP
	VectorDB Abandoned Nearest Neighbor	2023	Document / XML, Vector	US	Abandoned Nearest Neighbor
	VelocityDB Abandoned	2011	Object-Oriented	US	Abandoned
	Velox OLAP Query Engine AI-Assisted	2020	Relational	US	OLAP Query Engine AI-Assisted
	Venice AI-Assisted	2014	Document / XML	US	AI-Assisted
	VertexDB Abandoned	2009	Graph	US	Abandoned
	Vertica OLAP Forked Code Acquired Company	2005	Relational	US	OLAP Forked Code Acquired Company
	vFabric SQLFire	—	—	US
	VillageSQL Forked Code OLTP Revival Project AI-Assisted	2025	Relational	US	Forked Code OLTP Revival Project AI-Assisted
	VistaDB	2009	—	US
	Visual FoxPro xBase	1992	Relational	US	xBase
	Vitess Middleware AI-Assisted	2011	Relational	US	Middleware AI-Assisted
	Vitesse DB OLAP	2014	Relational	US	OLAP
	Voldemort Abandoned NoSQL	2009	Key-Value	US	Abandoned NoSQL
	VoltDB NewSQL	2009	Relational	US	NewSQL
VS	vsql Abandoned	2021	Relational	US	Abandoned
VU	VulcanDB Failed Company	2012	Object-Oriented	US	Failed Company
	WarehousePG Forked Code AI-Assisted	2025	Relational	US	Forked Code AI-Assisted
WE	WebSphere eXtreme Scale	—	Object-Oriented	US
	WonderDB Abandoned OLTP	2013	Relational	US	Abandoned OLTP
	XAP NoSQL	2000	Document / XML	US	NoSQL
	Xata Forked Code AI-Assisted	2020	Relational	US	Forked Code AI-Assisted
XD	XDB Enterprise Server Acquired Company	1998	Relational	US	Acquired Company
XP	XPRS	1988	—	US
	XtremeData OLAP	2003	Relational	US	OLAP
	Yellowbrick OLAP	2014	Relational	US	OLAP
	YottaDB NoSQL	2001	Key-Value	US	NoSQL
	YugabyteDB Forked Code OLTP AI-Assisted	2016	Key-Value, Relational	US	Forked Code OLTP AI-Assisted
	ZeroDB Abandoned	2015	Document / XML	US	Abandoned
	ZippyDB	2013	Key-Value	US
	ZippyDB Cache Serverless Failed Company	2014	Key-Value	US	Cache Serverless Failed Company
	ZODB	2002	Object-Oriented	US
	Zookeeper	2008	Hierarchical	US