467 Systems Found

Databases with Custom API Query Interface

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	1010data OLAP	2000	Relational	Custom API, HTTP / REST, SQL	OLAP
	4D	1984	Relational	Custom API, SQL
	Access	1992	Relational	Custom API
	Accumulo NoSQL	2008	Column Family / Wide-Column	Custom API, Command-line / Shell	NoSQL
	AceBase Web Browser	2018	Document / XML	Custom API	Web Browser
	ActorDB Abandoned	2014	Relational	Custom API, SQL	Abandoned
	Adabas	1971	Network	Custom API
	Aerospike NoSQL AI-Assisted	2009	Document / XML, Key/Value, Vector	Custom API	NoSQL AI-Assisted
AG	AgateDB Abandoned	2019	Key/Value	Custom API	Abandoned
	Akumuli Abandoned	2013	—	Custom API	Abandoned
	Akutan Abandoned	2019	Triplestore / RDF	Custom API	Abandoned
	AllocDB	2026	Relational	Custom API
	AnnaDB Abandoned NoSQL	2021	Document / XML	Custom API	Abandoned NoSQL
AN	AnuDB Serverless NoSQL	2025	Document / XML	Custom API	Serverless NoSQL
	Apollo xBase	1999	—	Custom API, SQL	xBase
	Arakoon Abandoned	2010	Key/Value	Custom API	Abandoned
	ArangoDB Multi-Model AI-Assisted	2011	Document / XML, Graph, Key/Value	Custom API, HTTP / REST, Command-line / Shell	Multi-Model AI-Assisted
	ArcticDB Time-Series OLAP AI-Assisted	2018	Relational	Custom API	Time-Series OLAP AI-Assisted
AR	Ardb Abandoned	2013	Key/Value	Custom API	Abandoned
	AresDB OLAP Abandoned	2018	Relational	Custom API	OLAP Abandoned
AS	Asami	2018	Graph	Custom API
	Assassin Abandoned Peer-to-Peer	2020	Key/Value	Custom API	Abandoned Peer-to-Peer
	AsterixDB OLAP AI-Assisted	2009	Document / XML	Custom API	OLAP AI-Assisted
	Atlas Time-Series AI-Assisted	2014	—	Custom API	Time-Series AI-Assisted
	AtomicDB Failed Company	2011	Object-Oriented	Custom API	Failed Company
	Atoti OLAP	2005	Relational	Custom API	OLAP
	AvionDB Abandoned Peer-to-Peer	2020	Document / XML	Custom API	Abandoned Peer-to-Peer
	AwaDB Abandoned Nearest Neighbor Search	2023	Document / XML, Vector	Custom API	Abandoned Nearest Neighbor Search
	BabuDB Abandoned	2008	Key/Value	Custom API	Abandoned
	BadgerDB AI-Assisted	2017	Key/Value	Custom API	AI-Assisted
	BagelDB	2023	Vector	Custom API
	BangDB Multi-Model NoSQL	2015	Key/Value	Custom API	Multi-Model NoSQL
	Basic	2023	Document / XML	Custom API
BB	bbolt Forked Code Revival Project	2017	Key/Value	Custom API	Forked Code Revival Project
	BBoxDB AI-Assisted	2015	Array / Matrix	Command-line / Shell, Custom API	AI-Assisted
	Beringei Time-Series Abandoned	2015	Key/Value	Custom API	Time-Series Abandoned
	Berkeley DB Acquired Company OLTP DBM	1994	Document / XML, Key/Value	Custom API, SQL, PL/SQL	Acquired Company OLTP DBM
	BerylDB	2021	Key/Value	Custom API
BI	BinaryRage Abandoned	2012	Key/Value	Custom API	Abandoned
	Bitcask Abandoned	2019	Key/Value	Custom API	Abandoned
	Bleve Search Engine AI-Assisted	2014	Document / XML, Vector	Custom API	Search Engine AI-Assisted
	BoltDB Abandoned	2013	Key/Value	Custom API	Abandoned
BR	BroDB Parody / Joke	2024	Relational	Custom API	Parody / Joke
	BTDB OLTP	2010	Key/Value, Object-Oriented	Custom API	OLTP
BU	Bubba Abandoned	1988	Object-Oriented	Custom API	Abandoned
	bugfruit Abandoned	2022	Key/Value	Custom API	Abandoned
CA	CamaDB Web Browser Abandoned NoSQL	2021	Document / XML	Custom API	Web Browser Abandoned NoSQL
	CapyDB Nearest Neighbor Search	2024	Document / XML	Custom API	Nearest Neighbor Search
	Cassandra NoSQL AI-Assisted	2008	Key/Value, Column Family / Wide-Column	Custom API	NoSQL AI-Assisted
	chDB OLAP Acquired Company AI-Assisted	2023	Relational	SQL	OLAP Acquired Company AI-Assisted
	Cheetah xBase	2005	Relational	Custom API	xBase
	Chroma Nearest Neighbor Search AI-Assisted	2022	Document / XML	Custom API	Nearest Neighbor Search AI-Assisted
CH	chromem-go Nearest Neighbor Search	2023	Vector	Custom API	Nearest Neighbor Search
	ChromoDB Abandoned	2024	Key/Value	Custom API	Abandoned
	Chronix Time-Series Abandoned	2015	—	Custom API	Time-Series Abandoned
	ClickHouse OLAP AI-Assisted	2016	Relational	Command-line / Shell, Custom API, HTTP / REST, SQL	OLAP AI-Assisted
	Cloud BigTable	2005	Column Family / Wide-Column	Custom API
	Cloud Datastore NoSQL	2013	Document / XML	Custom API, HTTP / REST, SQL	NoSQL
	Cloud Firestore Serverless	2017	Document / XML	Custom API	Serverless
CL	CloudSearch Search Engine	2012	Document / XML	Custom API	Search Engine
	CloverDB NoSQL AI-Assisted	2022	Document / XML	Custom API	NoSQL AI-Assisted
	CogDB	2017	Triplestore / RDF	Custom API
	Coherence Cache Acquired Company	2000	Object-Oriented	Custom API, HTTP / REST	Cache Acquired Company
	Column	2021	Relational	Custom API
	Compass Abandoned Search Engine	2006	Document / XML, Object-Oriented	Custom API	Abandoned Search Engine
	CompleteDB Abandoned OLTP	2012	Relational	Custom API	Abandoned OLTP
	Concourse	2012	Document / XML	Custom API
	Condensation Abandoned Blockchain	2020	Object-Oriented	Custom API	Abandoned Blockchain
	Consus Abandoned	2015	Key/Value	Custom API	Abandoned
	CoreObject Abandoned	2007	Object-Oriented	Custom API	Abandoned
	CornerStone Acquired Company	1985	Relational	Custom API	Acquired Company
	Couchbase NoSQL	2010	Key/Value, Document / XML	Custom API	NoSQL
	CovenantSQL Abandoned Blockchain	2018	Relational	SQL	Abandoned Blockchain
	CrossDB	2019	Relational	Custom API
	CSV Comp DB	2007	Relational	Custom API
	CubicWeb	2000	Graph	Custom API
	Cubrid AI-Assisted	2008	Relational	Custom API, SQL, Command-line / Shell, Stored Procedures	AI-Assisted
	CurioDB Abandoned NoSQL	2015	Key/Value	Custom API	Abandoned NoSQL
	DaggerDB	2014	Relational	Custom API
DA	DataBlitz OLTP	1993	Relational	Custom API, SQL	OLTP
	DB5 Abandoned Nearest Neighbor Search	2023	Document / XML, Vector	Custom API	Abandoned Nearest Neighbor Search
	dBASE xBase	1979	Relational	Custom API	xBase
	dbeel Abandoned NoSQL	2023	Document / XML	Custom API	Abandoned NoSQL
DB	DBOMP	1968	Hierarchical	Custom API
	DBreeze Multi-Model	2012	Document / XML, Key/Value	Custom API	Multi-Model
	DiceDB OLTP	2022	Key/Value	Custom API, HTTP / REST	OLTP
	DiggyDB Abandoned	2021	Document / XML	Custom API	Abandoned
	DittoBitto	2001	Relational	Custom API
	DocumentDB	2019	Document / XML	Custom API, Command-line / Shell
	DocumentDB Middleware NoSQL AI-Assisted	2023	Document / XML	Custom API	Middleware NoSQL AI-Assisted
	Dolt Versioning AI-Assisted	2018	Relational	Custom API, SQL, Command-line / Shell	Versioning AI-Assisted
	Doxa Abandoned	2021	Document / XML	Custom API	Abandoned
	Dragonfly Cache AI-Assisted	2021	Key/Value	Custom API	Cache AI-Assisted
	Druid OLAP AI-Assisted	2011	Column Family / Wide-Column	Custom API, SQL, HTTP / REST	OLAP AI-Assisted
	DuckDB OLAP AI-Assisted	2018	Relational	Custom API	OLAP AI-Assisted
	DynamoDB OLTP NoSQL	2012	Document / XML, Key/Value	Command-line / Shell, Custom API, PartiQL, SQL	OLTP NoSQL
	DynomiteDB Cache Abandoned Middleware	2012	Key/Value	Custom API	Cache Abandoned Middleware
	Earthstar Peer-to-Peer	2020	Document / XML	Custom API	Peer-to-Peer
	EasyDB Failed Company	2019	Document / XML	Custom API	Failed Company
	EchoDB	2021	Key/Value	Custom API
	Ehcache Cache Acquired Company	2003	Key/Value	Custom API	Cache Acquired Company
	EJDB	2012	Key/Value, Document / XML	Custom API, HTTP / REST
	Elara DB Abandoned	2021	Key/Value	Custom API	Abandoned
	Elasticsearch Search Engine NoSQL AI-Assisted	2004	Document / XML	Custom API	Search Engine NoSQL AI-Assisted
	Elevator Abandoned	2012	Key/Value	Custom API, Command-line / Shell	Abandoned
	Elliptics Abandoned	2009	Key/Value	Custom API, Command-line / Shell	Abandoned
	Eloquera	2008	Object-Oriented	Custom API, SQL
EM	EmbedDB Time-Series	2023	Relational	Custom API, SQL	Time-Series
	Endeca OLAP Acquired Company	1999	Document / XML	Custom API	OLAP Acquired Company
	Engram AI-Assisted	2026	Graph	Custom API, HTTP / REST	AI-Assisted
	Engula	2022	Key/Value	Custom API
	Epsilla Nearest Neighbor Search	2023	Array / Matrix	Custom API	Nearest Neighbor Search
	Essbase OLAP Acquired Company	1992	Array / Matrix	Custom API	OLAP Acquired Company
	Essentia Failed Company	—	Object-Oriented, Relational	Custom API	Failed Company
	EuclidesDB Abandoned	2018	Array / Matrix	Custom API, HTTP / REST	Abandoned
	EuclidOLAP OLAP	2022	Array / Matrix	Custom API	OLAP
	EventSourcingDB Time-Series Immutable	2022	Document / XML	Custom API	Time-Series Immutable
	evitaDB AI-Assisted	2020	Document / XML	RPC, Custom API, HTTP / REST, GraphQL	AI-Assisted
	Express Acquired Company	1970	Array / Matrix	Custom API	Acquired Company
	ExtendDB Middleware AI-Assisted	2026	Key/Value, Document / XML	Custom API, HTTP / REST	Middleware AI-Assisted
EX	Extensible Storage Engine	1994	Key/Value	Custom API
	eXtremeDB Cache Time-Series OLTP Middleware	2001	Column Family / Wide-Column, Entity-Relationship, Key/Value, Relational	Command-line / Shell, Custom API, HTTP / REST, RPC, SQL, Stored Procedures	Cache Time-Series OLTP Middleware
	EyeDB Abandoned	1992	Object-Oriented	Custom API	Abandoned
	eyros Time-Series Abandoned	2018	Array / Matrix	Custom API	Time-Series Abandoned
	FalkorDB AI-Assisted	2023	Graph	Custom API	AI-Assisted
	FASTER	2018	Key/Value	Custom API
	FatDB Cache Failed Company NoSQL	2012	Key/Value	Custom API	Cache Failed Company NoSQL
	FeatureBase Abandoned Search Engine	2017	Relational	Custom API, HTTP / REST, SQL, Command-line / Shell	Abandoned Search Engine
	FeatureForm Acquired Company Nearest Neighbor Search	2020	Vector	Custom API	Acquired Company Nearest Neighbor Search
	FerretDB AI-Assisted	2021	Document / XML	Custom API	AI-Assisted
FI	FileDb Abandoned NoSQL	2011	Relational	Custom API, SQL	Abandoned NoSQL
	FileDB Abandoned	2010	Key/Value	Custom API	Abandoned
	FileMaker Acquired Company	1985	Relational	Custom API, SQL	Acquired Company
	FineDB Abandoned NoSQL	2013	Key/Value	Custom API	Abandoned NoSQL
	Firebase Acquired Company NoSQL	2011	Document / XML	Custom API	Acquired Company NoSQL
	Firebird AI-Assisted	2000	Relational	Custom API, SQL, Command-line / Shell, Stored Procedures	AI-Assisted
	Fireproof Peer-to-Peer AI-Assisted	2022	Document / XML	Custom API	Peer-to-Peer AI-Assisted
	FirstSQL/J Failed Company	2001	Relational	Command-line / Shell, Custom API, SQL, Stored Procedures	Failed Company
	Fjall OLTP	2023	Key/Value	Custom API	OLTP
	FlashDB	2020	Key/Value	Custom API
FL	FleetDB Abandoned	2009	Document / XML	Custom API	Abandoned
	Fluree Blockchain AI-Assisted	2017	Document / XML, Graph, Triplestore / RDF, Relational	SPARQL, Custom API, SQL, HTTP / REST, GraphQL	Blockchain AI-Assisted
FO	Fongo Abandoned NoSQL	2012	Document / XML	Custom API	Abandoned NoSQL
FO	ForestDB Abandoned	2013	Key/Value	Custom API	Abandoned
	FoundationDB Acquired Company OLTP AI-Assisted	2009	Key/Value	Custom API	Acquired Company OLTP AI-Assisted
	FramerD	1996	Object-Oriented	Custom API
	FrostDB Time-Series	2022	Column Family / Wide-Column	Custom API	Time-Series
	Gaia Abandoned Failed Company	2020	Object-Oriented	Custom API	Abandoned Failed Company
	Garnet Cache AI-Assisted	2021	Key/Value	Custom API	Cache AI-Assisted
	GDBM DBM	1990	Key/Value	Custom API	DBM
	Gel OLAP AI-Assisted	2018	Relational	Custom API, SQL, HTTP / REST, Command-line / Shell, GraphQL	OLAP AI-Assisted
	GemStone/S	1986	Object-Oriented	Custom API
	Genesis DB Streaming	2025	Document / XML	Custom API, HTTP / REST	Streaming
	GenomicsDB	2016	Array / Matrix	Custom API
	Geode Cache Forked Code OLTP NoSQL	2015	Key/Value	Custom API	Cache Forked Code OLTP NoSQL
	GlobalsDB	2011	Array / Matrix	Custom API
	Glowdust	2023	Relational	Custom API
	GoatDB Web Browser AI-Assisted	2024	Document / XML	Custom API	Web Browser AI-Assisted
	Goldilocks	2010	Relational	Custom API, SQL
	GoshawkDB Abandoned	2015	Object-Oriented	Custom API	Abandoned
	GrapheekDB Abandoned	2014	Key/Value, Graph	Custom API, Gremlin	Abandoned
	Graviton Versioning Abandoned	2020	Key/Value	Custom API	Versioning Abandoned
	GridDB	2011	Key/Value	Custom API, SQL, Command-line / Shell, HTTP / REST
	GridGain	2007	Key/Value	Custom API
	GUN Peer-to-Peer	2014	Graph	Custom API	Peer-to-Peer
	Hadoop OLAP AI-Assisted	2006	—	Custom API	OLAP AI-Assisted
	HampusDB	2006	Key/Value	Custom API
	HANA	2010	Column Family / Wide-Column	Custom API, SQL
HA	HaystackDB Abandoned Nearest Neighbor Search MMAP	2024	Vector	Custom API	Abandoned Nearest Neighbor Search MMAP
	Hazelcast Cache	2008	Key/Value	Custom API	Cache
	HBase NoSQL	2007	Column Family / Wide-Column	Custom API	NoSQL
	HelixDB OLTP Nearest Neighbor Search AI-Assisted	2024	Graph, Vector	Custom API	OLTP Nearest Neighbor Search AI-Assisted
	HerdDB	2016	Relational	Custom API, SQL, Command-line / Shell
	Heroic Abandoned	2015	Key/Value	Custom API	Abandoned
	Histore Abandoned	2018	Key/Value	Custom API	Abandoned
	Hive Abandoned	2019	Key/Value	Custom API	Abandoned
	HollowDB Abandoned Blockchain	2023	Key/Value	Custom API	Abandoned Blockchain
HO	HorizonDB Geospatial	2025	Document / XML	Custom API	Geospatial
	HStreamDB Streaming	2020	Relational	Custom API, SQL	Streaming
	Husky Time-Series	2020	Document / XML	Custom API	Time-Series
	HyperDex Abandoned NoSQL	2011	Key/Value	Custom API	Abandoned NoSQL
	HyperGraphDB	2007	Graph	Custom API
	Hypertable Acquired Company Abandoned	2008	Column Family / Wide-Column	Custom API, Command-line / Shell	Acquired Company Abandoned
	iBoxDB Serverless Mobile NoSQL	2014	Document / XML	Custom API	Serverless Mobile NoSQL
	IceFireDB	2021	Key/Value	Custom API, HTTP / REST
	ImmortalDB Web Browser	2018	Key/Value	Custom API	Web Browser
	Impala OLAP AI-Assisted	2013	Relational	Custom API, SQL	OLAP AI-Assisted
	IMS OLTP	1966	Hierarchical	Custom API, HTTP / REST, SQL	OLTP
	IndraDB	2016	Graph	Custom API
	Infinispan Cache	2009	Key/Value	Custom API	Cache
	Infinity Nearest Neighbor Search	2022	Relational	Custom API, SQL	Nearest Neighbor Search
	InfluxDB Time-Series AI-Assisted	2013	Column Family / Wide-Column	Custom API, SQL, HTTP / REST	Time-Series AI-Assisted
	Infobright OLAP Acquired Company	2005	Relational	Custom API	OLAP Acquired Company
	Ingres Acquired Company	1974	Relational	Custom API, QUEL, SQL, Stored Procedures	Acquired Company
	IonDB Abandoned	2015	Key/Value	Custom API	Abandoned
	IoTDB Time-Series AI-Assisted	2017	Hierarchical	Custom API, SQL	Time-Series AI-Assisted
	Irmin	2013	Document / XML	Custom API, Command-line / Shell
	JaguarDB Nearest Neighbor Search	2017	Array / Matrix, Key/Value	Command-line / Shell, Custom API, SQL	Nearest Neighbor Search
JA	JameSQL NoSQL	2024	Document / XML	Custom API	NoSQL
	jasonisnthappy OLTP	2025	Document / XML	Custom API	OLTP
	jBASE Acquired Company	1989	Multi-Value	Custom API	Acquired Company
	JinDB Abandoned	2019	—	Custom API	Abandoned
	Joedb	2014	Relational	Custom API
JS	JSDB Abandoned	2020	Document / XML	Custom API	Abandoned
	JuliaDB Abandoned	2017	Relational	Custom API	Abandoned
JU	JunoDB Abandoned NoSQL	—	Key/Value	Custom API	Abandoned NoSQL
	k4 Time-Series Abandoned	2024	Key/Value	Custom API	Time-Series Abandoned
	Kai Abandoned	2008	Key/Value	Custom API	Abandoned
	Kappa Abandoned	1989	Relational	Custom API	Abandoned
	KektorDB Nearest Neighbor Search	2025	Graph	Custom API	Nearest Neighbor Search
	KenobiDB Abandoned Middleware	2019	Document / XML	Custom API	Abandoned Middleware
	KeyDB Acquired Company Abandoned NoSQL	2019	—	Custom API	Acquired Company Abandoned NoSQL
KI	KingDB Abandoned MMAP	2012	Key/Value	Custom API	Abandoned MMAP
	Kronicler Time-Series	2025	Relational	Custom API	Time-Series
	Kronotop NoSQL	2023	Document / XML	Custom API	NoSQL
	ksqlDB Streaming AI-Assisted	2017	Key/Value, Relational	Custom API, SQL, Command-line / Shell	Streaming AI-Assisted
	Kudu OLTP	2016	Relational	Custom API	OLTP
	Kvrocks NoSQL AI-Assisted	2019	Key/Value	Custom API	NoSQL AI-Assisted
	Kyoto Cabinet	2009	Key/Value	Custom API, Command-line / Shell
	LanceDB Search Engine AI-Assisted	2023	Document / XML	Custom API, SQL	Search Engine AI-Assisted
LA	Lazer	2013	Document / XML	Custom API
	LazyDB	2020	Document / XML	Custom API
	LeanStore OLTP	2018	Key/Value	Custom API	OLTP
	LedisDB Abandoned NoSQL	2014	Key/Value	Custom API, HTTP / REST, Command-line / Shell	Abandoned NoSQL
	LesbianDB Abandoned	2022	Document / XML	Custom API	Abandoned
	LevelDB MMAP	2011	Key/Value	Custom API	MMAP
LI	libmdbx Forked Code MMAP	2015	Key/Value	Custom API	Forked Code MMAP
	libSQL Forked Code OLTP	2022	Relational	SQL	Forked Code OLTP
	LightCloud Abandoned	2009	Key/Value	Custom API	Abandoned
	LightDB Abandoned NoSQL	2021	Document / XML	Custom API	Abandoned NoSQL
	LightDB Abandoned	2017	Array / Matrix	Custom API	Abandoned
LI	LineairDB AI-Assisted	2020	Key/Value	Custom API	AI-Assisted
	LintDB Nearest Neighbor Search	2024	Vector	Custom API	Nearest Neighbor Search
	LMDB MMAP DBM AI-Assisted	2011	Key/Value	Custom API	MMAP DBM AI-Assisted
	LogosDB AI-Assisted	2026	Vector	Custom API, Model Context Protocol	AI-Assisted
	LonaDB NoSQL	2023	Document / XML	Custom API	NoSQL
	LotusDB OLTP	2021	Key/Value	Custom API	OLTP
	Lucene Search Engine MMAP AI-Assisted	1999	Document / XML	Custom API	Search Engine MMAP AI-Assisted
	LungoDB	2019	Document / XML	Custom API
	Magma	2002	Object-Oriented	Custom API
	MangoDB Parody / Joke Abandoned NoSQL	2012	Document / XML	Custom API	Parody / Joke Abandoned NoSQL
	MapR-DB Acquired Company	2012	Column Family / Wide-Column	Custom API	Acquired Company
	MarcelloDB Abandoned	2014	Object-Oriented	Custom API	Abandoned
	MariaDB AI-Assisted	2009	Relational	Custom API, SQL, Stored Procedures	AI-Assisted
	MarkLogic Acquired Company	2001	Document / XML, Triplestore / RDF	Custom API	Acquired Company
	Marqo Search Engine AI-Assisted	2022	Document / XML, Vector	Custom API	Search Engine AI-Assisted
MC	mcdb Abandoned Immutable MMAP	2010	Key/Value	Custom API	Abandoned Immutable MMAP
	Meilisearch Search Engine AI-Assisted	2018	Document / XML	Custom API, HTTP / REST	Search Engine AI-Assisted
	Memcached Cache	2003	Key/Value	Custom API	Cache
	Memstate Abandoned	2017	Object-Oriented	Custom API	Abandoned
	MenteDB AI-Assisted	2026	Vector, Graph	Custom API	AI-Assisted
	Milvus Nearest Neighbor Search AI-Assisted	2019	Vector	Custom API	Nearest Neighbor Search AI-Assisted
	Mnesia	—	Relational	Custom API
	MobyDB	2026	Key/Value	Custom API, HTTP / REST
	ModeShape Abandoned	2008	Object-Oriented	Custom API, SQL, HTTP / REST	Abandoned
	MongoDB NoSQL AI-Assisted	2009	Document / XML	Custom API	NoSQL AI-Assisted
	Mongrel Serverless Failed Company	2021	Key/Value	Custom API	Serverless Failed Company
	NavDB Abandoned	2017	Key/Value, Relational	Command-line / Shell, Custom API, SQL	Abandoned
	NDatabase	—	Object-Oriented	Custom API
ND	NDB Cluster Acquired Company OLTP	—	Key/Value	Custom API	Acquired Company OLTP
	Nebula Graph	2018	Graph	Custom API
	NeDB Abandoned	2013	Document / XML	Custom API	Abandoned
	NEO	2005	Document / XML	Custom API
	NeoDatis ODB Abandoned	2006	Object-Oriented	Custom API	Abandoned
	nessDB Abandoned	2011	Key/Value	Custom API	Abandoned
	NeuroDB	2020	Graph	Custom API
	Nitrite NoSQL AI-Assisted	2017	Document / XML	Custom API	NoSQL AI-Assisted
	NoKV NoSQL AI-Assisted	2024	Key/Value	Custom API	NoSQL AI-Assisted
	NosDB Abandoned	2013	Document / XML	Custom API, HTTP / REST	Abandoned
	NoSQL Object Database Acquired Company NoSQL	1988	Object-Oriented	Custom API	Acquired Company NoSQL
	NucliaDB Nearest Neighbor Search Search Engine	2021	Vector	Custom API, HTTP / REST	Nearest Neighbor Search Search Engine
	NuDB Abandoned	2016	Key/Value	Custom API	Abandoned
	Numstore Query Engine	2026	Array / Matrix	Custom API	Query Engine
	NunDB	2018	Object-Oriented	Custom API
	NutsDB AI-Assisted	2018	Key/Value	Custom API	AI-Assisted
	O2 Failed Company	1990	Object-Oriented	Custom API	Failed Company
	ObjectBox Time-Series Nearest Neighbor Search MMAP Mobile NoSQL	2016	Object-Oriented	Custom API	Time-Series Nearest Neighbor Search MMAP Mobile NoSQL
	ObjectStore Acquired Company	1988	Object-Oriented	Custom API	Acquired Company
	ObsessionDB OLAP Hosting Service	2024	Relational	SQL	OLAP Hosting Service
	OctaneDB Nearest Neighbor Search	2025	Vector	Custom API	Nearest Neighbor Search
	ODABA	1994	Object-Oriented	Custom API, HTTP / REST
	OnceDB Cache Abandoned Failed Company	2016	Document / XML	Custom API	Cache Abandoned Failed Company
	OpenEdge OLTP	1984	Relational	Custom API, SQL	OLTP
	OpenSearch Forked Code Search Engine AI-Assisted	2021	Document / XML	Custom API, Model Context Protocol	Forked Code Search Engine AI-Assisted
	OpenTSDB Time-Series	2010	Key/Value	Command-line / Shell, Custom API, HTTP / REST	Time-Series
	Oracle NoSQL NoSQL	2011	Key/Value	Custom API	NoSQL
	OrbitDB Peer-to-Peer	2015	Document / XML, Key/Value	Custom API	Peer-to-Peer
	OrigoDB Abandoned	2011	Key/Value, Graph, Object-Oriented, Document / XML, Relational	Custom API	Abandoned
	Oxia AI-Assisted	2021	Key/Value	Custom API	AI-Assisted
	Pail Peer-to-Peer	2022	Key/Value	Custom API	Peer-to-Peer
PA	PalDB Abandoned	2015	Key/Value	Custom API	Abandoned
	Paper Abandoned NoSQL	2015	Key/Value, Object-Oriented	Custom API	Abandoned NoSQL
	Pebble AI-Assisted	2018	Key/Value	Custom API	AI-Assisted
PE	Peterlee Relational Test Vehicle	1970	Relational	Custom API
	pickleDB	2011	Document / XML	Custom API
	Pika AI-Assisted	2014	Key/Value	Custom API	AI-Assisted
	Pilosa Abandoned	2017	Vector	Custom API, HTTP / REST	Abandoned
	Pinecone Nearest Neighbor Search Search Engine	2019	Vector	Custom API	Nearest Neighbor Search Search Engine
PN	PNUTS Abandoned OLTP NoSQL	2008	Key/Value	Custom API	Abandoned OLTP NoSQL
	PocketBase	2022	Relational	Custom API
	Pogocache Cache	2025	Key/Value	Custom API, HTTP / REST	Cache
	Pogreb MMAP	2018	Key/Value	Custom API	MMAP
	Polars Query Engine AI-Assisted	2020	—	Custom API	Query Engine AI-Assisted
	PoloDB NoSQL	2020	Document / XML	Custom API	NoSQL
	Polybase Blockchain	2022	Document / XML	Custom API	Blockchain
	Polyhedra Acquired Company	1994	Relational	Custom API, SQL	Acquired Company
	PosDB OLAP	2017	Relational	Custom API, SQL	OLAP
	PouchDB Web Browser NoSQL	2010	Document / XML	Custom API	Web Browser NoSQL
	ProfaneDB Abandoned	2017	Object-Oriented	Custom API	Abandoned
	ProvenDB Acquired Company Blockchain Middleware	2018	Document / XML	Custom API	Acquired Company Blockchain Middleware
	PysonDB Abandoned NoSQL	2020	Document / XML	Custom API	Abandoned NoSQL
	Qdrant Nearest Neighbor Search Search Engine MMAP AI-Assisted	2020	Vector	Custom API	Nearest Neighbor Search Search Engine MMAP AI-Assisted
	Quadrable Abandoned	2020	Key/Value	Custom API, Command-line / Shell	Abandoned
	quasardb	2008	Key/Value	Custom API
	Quickwit Acquired Company Search Engine AI-Assisted	2021	Document / XML	Custom API	Acquired Company Search Engine AI-Assisted
	RaimaDB Time-Series	1984	Network, Relational	Command-line / Shell, Custom API, PL/SQL, SQL, Stored Procedures	Time-Series
	Raphtory OLAP AI-Assisted	2020	Graph	Custom API, GraphQL	OLAP AI-Assisted
	RaptorDB Abandoned	2012	Document / XML	Custom API	Abandoned
	RavenDB MMAP NoSQL AI-Assisted	2009	Document / XML, Key/Value	Custom API, HTTP / REST	MMAP NoSQL AI-Assisted
	RayforceDB OLAP AI-Assisted	2023	Relational	Custom API	OLAP AI-Assisted
	Realm Acquired Company Abandoned Mobile	2011	Object-Oriented	Custom API	Acquired Company Abandoned Mobile
	redb OLTP AI-Assisted	2018	Key/Value	Custom API	OLTP AI-Assisted
	RedDatabase Forked Code	2006	Relational	SQL	Forked Code
	Redict Cache Forked Code NoSQL	2024	Key/Value	Custom API	Cache Forked Code NoSQL
	Redis Cache OLTP AI-Assisted	2009	Key/Value	Custom API	Cache OLTP AI-Assisted
	RedixDB Abandoned	2018	Key/Value	Custom API	Abandoned
	ReductStore Time-Series AI-Assisted	2021	Key/Value	Custom API, HTTP / REST	Time-Series AI-Assisted
	Redwood Abandoned Peer-to-Peer	2019	Key/Value	Custom API	Abandoned Peer-to-Peer
RE	RefineDB Abandoned	2021	Document / XML	Custom API	Abandoned
	ReifyDB OLTP	2025	Relational	Custom API	OLTP
	Rel	2004	Relational	Custom API
	RelationalAI	2018	Graph, Relational	Custom API, SQL
RE	Relatude.DB	2025	Graph, Object-Oriented	Custom API
	Relaxo Abandoned	2012	Document / XML	Custom API	Abandoned
	Resin Cache Cache Middleware	1998	Key/Value	Custom API	Cache Middleware
	RethinkDB Failed Company NoSQL	2009	Document / XML	Custom API	Failed Company NoSQL
	RexDB Acquired Company	2006	Relational	Custom API, PL/SQL, SQL	Acquired Company
	Rockall-DB	—	—	Custom API
	RocksDB Forked Code OLTP	2012	Key/Value	Custom API	Forked Code OLTP
	ROMA Abandoned	2009	Key/Value	Custom API	Abandoned
	RonDB OLTP AI-Assisted	2020	Key/Value, Relational	Custom API, HTTP / REST, SQL	OLTP AI-Assisted
	RoseDB NoSQL AI-Assisted	2020	Key/Value	Custom API	NoSQL AI-Assisted
	RudraDB Nearest Neighbor Search	2025	Document / XML, Vector	Custom API	Nearest Neighbor Search
	RxDB AI-Assisted	2016	Document / XML	Custom API, GraphQL	AI-Assisted
	SableDb Cache NoSQL	2024	Key/Value	Custom API	Cache NoSQL
	SapphireDb Abandoned	2018	Object-Oriented	Custom API, HTTP / REST	Abandoned
	Scalaris Abandoned	2009	Key/Value	Custom API	Abandoned
	SchemaJS NoSQL	2024	Document / XML	Custom API	NoSQL
	Scuba	2013	Relational	Custom API, SQL, HTTP / REST
	Scylla NoSQL AI-Assisted	2014	Key/Value, Column Family / Wide-Column	Custom API	NoSQL AI-Assisted
SD	SDB	—	Document / XML, Relational	Custom API
	SeekDB AI-Assisted	2025	Relational, Vector	Custom API, SQL	AI-Assisted
	SenseiDB Abandoned	2012	Relational	Custom API	Abandoned
SH	Shore Abandoned OLTP	1995	Object-Oriented	Command-line / Shell, Custom API	Abandoned OLTP
SH	Shore-MT Forked Code OLTP	2007	Object-Oriented	Custom API, Command-line / Shell	Forked Code OLTP
	Siaqodb Abandoned Failed Company NoSQL	—	Document / XML	Custom API	Abandoned Failed Company NoSQL
	SignalDB NoSQL AI-Assisted	2023	Document / XML	Custom API	NoSQL AI-Assisted
SI	Silo Abandoned	2013	Relational	Custom API	Abandoned
	SimpleDB NoSQL	2007	Key/Value	Custom API	NoSQL
	Sir.DB Abandoned	2020	Document / XML	Custom API	Abandoned
	SiriDB Time-Series	2016	—	Custom API	Time-Series
	Sklad NoSQL	2024	Key/Value	Custom API	NoSQL
	Skytable NoSQL	2020	Key/Value	Custom API	NoSQL
	SlateDB AI-Assisted	2024	Key/Value	Custom API	AI-Assisted
	Sled	2016	Key/Value	Custom API
	SleekDB	2018	Document / XML	Custom API
	SlyceIO	2023	Document / XML	Custom API
	solidDB Acquired Company OLTP	1992	Relational	Command-line / Shell, Custom API, HTTP / REST, SQL, Stored Procedures	Acquired Company OLTP
	Solr Search Engine NoSQL AI-Assisted	2004	Document / XML	Custom API	Search Engine NoSQL AI-Assisted
	sones GraphDB Abandoned Failed Company	2007	Graph	Custom API, HTTP / REST	Abandoned Failed Company
	Sophia Abandoned OLTP NoSQL	2014	Key/Value	Custom API	Abandoned OLTP NoSQL
	SpacetimeDB OLTP AI-Assisted	2023	Relational	Custom API, HTTP / REST, SQL	OLTP AI-Assisted
SP	Sparkey Abandoned Immutable	2013	Key/Value	Custom API	Abandoned Immutable
	Sparksee	2006	Graph, Object-Oriented	Custom API
	Spark SQL OLAP AI-Assisted	2014	—	Custom API, SQL	OLAP AI-Assisted
	Speedb Forked Code Acquired Company	2020	Key/Value	Custom API	Forked Code Acquired Company
	SpiceDB Middleware AI-Assisted	2021	Object-Oriented	Custom API, HTTP / REST	Middleware AI-Assisted
	SplinterDB NoSQL	2018	Key/Value	Custom API	NoSQL
	Splunk Acquired Company Search Engine	2002	Key/Value	Custom API	Acquired Company Search Engine
	SQLite OLTP	2000	Relational	Custom API, SQL	OLTP
	Sqrrl Acquired Company NoSQL	2012	Graph, Key/Value	Custom API	Acquired Company NoSQL
	SSDB Abandoned	2013	Key/Value	Custom API, Command-line / Shell	Abandoned
	Starskey OLTP	2025	Key/Value	Custom API	OLTP
ST	StormiDB NoSQL	2024	Document / XML	Custom API	NoSQL
	SummitDB Abandoned NoSQL	2016	Key/Value	Custom API	Abandoned NoSQL
	Superbase	1983	Relational	Custom API
	Supra Server SQL Acquired Company OLTP	1989	Relational	Custom API, SQL	Acquired Company OLTP
	SurrealDB Serverless Multi-Model AI-Assisted	2016	Document / XML, Graph, Relational	RPC, Custom API, HTTP / REST, SQL	Serverless Multi-Model AI-Assisted
	SwayDB Abandoned	2018	Key/Value	Custom API	Abandoned
	SWC-DB Abandoned	2019	Column Family / Wide-Column, Key/Value	Command-line / Shell, Custom API, SQL	Abandoned
	Swytch Cache	2023	Key/Value	Custom API	Cache
SY	SylvieJS Web Browser	2023	Document / XML	Custom API	Web Browser
	Tajo OLAP Abandoned	2012	Relational	Command-line / Shell, Custom API, SQL	OLAP Abandoned
	Tantivy Search Engine MMAP AI-Assisted	2016	Document / XML	Custom API	Search Engine MMAP AI-Assisted
	Tanzu GemFire Cache Acquired Company NoSQL	2002	Key/Value	Command-line / Shell, Custom API, SQL	Cache Acquired Company NoSQL
	Tarantool	2008	Key/Value	Custom API, Command-line / Shell, Stored Procedures
	Tdbengine	1985	Relational	Custom API
	TDengine Time-Series AI-Assisted	2017	Relational	Custom API, HTTP / REST, SQL, Command-line / Shell	Time-Series AI-Assisted
	Tendis NoSQL	2018	Key/Value	Custom API	NoSQL
	TerarkDB Forked Code Acquired Company	2016	Key/Value	Custom API	Forked Code Acquired Company
	TerminusDB AI-Assisted	2019	Document / XML, Graph, Triplestore / RDF	Custom API, Datalog	AI-Assisted
	Terrastore Abandoned	2009	Document / XML	Custom API	Abandoned
	ThreadDB Abandoned Peer-to-Peer	2019	Document / XML	Custom API	Abandoned Peer-to-Peer
	Tibero OLTP	2003	Relational	Custom API, PL/SQL, SQL	OLTP
	TidesDB OLTP	2024	Column Family / Wide-Column	Custom API	OLTP
	TieredMemDB Cache Forked Code Abandoned NoSQL	2020	Key/Value	Command-line / Shell	Cache Forked Code Abandoned NoSQL
	TigerBeetle	2020	Relational	Custom API
	TigerGraph	2012	Graph	Custom API, HTTP / REST
	TiKV AI-Assisted	2016	Key/Value	Custom API	AI-Assisted
	Tile38	2016	—	Custom API, HTTP / REST
	TileDB NoSQL	2014	Array / Matrix	Custom API, SQL	NoSQL
	TingoDB Abandoned	2013	Document / XML	Custom API	Abandoned
	TinyBase	2021	Relational	Custom API
	TinyDB	2013	Document / XML	Custom API
	Tkrzw DBM	2020	Key/Value	Custom API	DBM
	TokuMX Forked Code Acquired Company Abandoned	2013	Document / XML	Custom API	Forked Code Acquired Company Abandoned
	Tokyo Cabinet	2006	Key/Value	Custom API
	Tonbo OLTP AI-Assisted	2024	Key/Value	Custom API	OLTP AI-Assisted
	TonicDB OLTP	2025	Key/Value	Custom API	OLTP
	TopK Nearest Neighbor Search Search Engine AI-Assisted	2024	Document / XML	Custom API	Nearest Neighbor Search Search Engine AI-Assisted
	ToplingDB Forked Code AI-Assisted	2021	Key/Value	Custom API	Forked Code AI-Assisted
	TrailDB Abandoned	2014	Relational	Custom API	Abandoned
	TukDB Search Engine	2024	Document / XML	Custom API	Search Engine
	Turso OLTP AI-Assisted	2023	Relational	SQL	OLTP AI-Assisted
	TypeDB AI-Assisted	2016	Entity-Relationship, Graph	Custom API	AI-Assisted
	Ultipa OLAP OLTP NoSQL	2019	Graph	Custom API, HTTP / REST	OLAP OLTP NoSQL
	Unbounded Failed Company	2020	Document / XML	Custom API	Failed Company
	UniSQL Acquired Company	1991	Relational	Custom API	Acquired Company
	upscaledb OLAP Abandoned	2007	Key/Value	Custom API, SQL	OLAP Abandoned
	Vald Nearest Neighbor Search Search Engine AI-Assisted	2019	Vector	Custom API, HTTP / REST	Nearest Neighbor Search Search Engine AI-Assisted
	Valkey Cache Forked Code NoSQL AI-Assisted	2024	Key/Value	Custom API	Cache Forked Code NoSQL AI-Assisted
VA	Valthree Cache NoSQL	2025	Key/Value	Custom API	Cache NoSQL
	VanillaDB Abandoned	2016	Multi-Value	Custom API, SQL, Stored Procedures	Abandoned
	VectorDB Nearest Neighbor Search	2023	Document / XML, Vector	Custom API	Nearest Neighbor Search
	Vedis Abandoned	2014	Key/Value	Custom API	Abandoned
	VelarixDB	2024	Key/Value	Custom API
	Velox OLAP Query Engine AI-Assisted	2020	Relational	Custom API	OLAP Query Engine AI-Assisted
	VeloxDB OLTP	2022	Object-Oriented	Custom API	OLTP
	Venice AI-Assisted	2014	Document / XML	Custom API	AI-Assisted
	VennDB	2023	Relational	Custom API
	Vertica OLAP Forked Code Acquired Company	2005	Relational	Custom API, SQL	OLAP Forked Code Acquired Company
	Vespa Search Engine AI-Assisted	1997	Document / XML	Custom API, SQL	Search Engine AI-Assisted
	VictoriaMetrics Time-Series AI-Assisted	2018	Column Family / Wide-Column	Custom API, PromQL	Time-Series AI-Assisted
	Virtuoso	1998	Relational	Custom API, SQL, HTTP / REST
	Vitesse DB OLAP	2014	Relational	Custom API	OLAP
	voidDB OLTP MMAP	2024	Key/Value	Custom API	OLTP MMAP
	Voldemort Abandoned NoSQL	2009	Key/Value	Custom API	Abandoned NoSQL
	vyhodb Abandoned	2012	Network	Custom API	Abandoned
	Warp 10 Time-Series	2013	—	Custom API	Time-Series
	WhiteDB Abandoned	2008	Network	Custom API	Abandoned
	WiredTiger Acquired Company AI-Assisted	2008	Key/Value	Custom API, Command-line / Shell	Acquired Company AI-Assisted
	XAP	2000	Key/Value	Custom API, SQL
	Xapian Search Engine	2001	Document / XML	Custom API	Search Engine
	YantrikDB AI-Assisted	2026	Graph, Key/Value, Vector	Custom API, HTTP / REST, Model Context Protocol	AI-Assisted
	Yanza Time-Series Failed Company	2008	Document / XML	Custom API, HTTP / REST	Time-Series Failed Company
	YaraDB	2025	Document / XML	Custom API, HTTP / REST
	YottaDB NoSQL	2001	Key/Value	Custom API	NoSQL
	YouTrackDB Forked Code AI-Assisted	2024	Graph	Custom API, SQL, Gremlin	Forked Code AI-Assisted
	YugabyteDB Forked Code OLTP AI-Assisted	2016	Key/Value, Relational	Custom API, PL/SQL	Forked Code OLTP AI-Assisted
	Zentropy	2025	Key/Value	Custom API
	ZeptoDB Time-Series AI-Assisted	2026	—	Custom API, HTTP / REST, SQL	Time-Series AI-Assisted
	ZeroDB Abandoned	2015	Document / XML	Custom API	Abandoned
	ZippyDB	2013	Key/Value	Custom API
	ZippyDB Cache Serverless Failed Company	2014	Key/Value	Custom API	Cache Serverless Failed Company
	ZODB	2002	Object-Oriented	Custom API
	ZooDB Abandoned	2008	Object-Oriented	Custom API	Abandoned
	Zvec Nearest Neighbor Search	2023	Vector	Custom API	Nearest Neighbor Search