Databases Written in C++ · Database of Databases


	Access Acquired Company	1992	Relational	C++	Acquired Company
	Adaptive Server Enterprise Acquired Company	1987	Relational	C++	Acquired Company
	Akumuli Abandoned Project	2013	—	C++	Abandoned Project
	Altibase OLTP	1999	Relational	C++	OLTP
AN	AnuDB Serverless NoSQL	2025	Document / XML	C++	Serverless NoSQL
	ArangoDB Multi-Model AI-Assisted	2011	Document / XML, Graph, Key/Value	C++	Multi-Model AI-Assisted
	ArcticDB Time-Series OLAP AI-Assisted	2018	Relational	C++	Time-Series OLAP AI-Assisted
AR	Ardb Abandoned Project	2013	Key/Value	C++	Abandoned Project
	AresDB OLAP Abandoned Project	2018	Relational	C++	OLAP Abandoned Project
	Ark	2026	—	C++
	AwaDB Abandoned Project Nearest Neighbor Search	2023	Document / XML, Vector	C++	Abandoned Project Nearest Neighbor Search
	Azure SQL Database	2009	Relational	C++
	BabuDB Abandoned Project	2008	Key/Value	C++	Abandoned Project
	BaikalDB	2018	Relational	C++
	Beagle SQL Abandoned Project	1996	Relational	C++	Abandoned Project
	Bedrock Blockchain OLTP AI-Assisted	2016	Relational	C++	Blockchain OLTP AI-Assisted
	Beringei Time-Series Abandoned Project	2015	Key/Value	C++	Time-Series Abandoned Project
	BerylDB	2021	Key/Value	C++
	BigQuery OLAP Serverless	2010	Document / XML	C++	OLAP Serverless
	BlackRay Failed Company	2005	Relational	C++	Failed Company
	BlazingSQL OLAP Abandoned Project Failed Company	2015	Relational	C++	OLAP Abandoned Project Failed Company
	Brytlyt OLAP Forked Code Acquired Company	2013	Relational	C++	OLAP Forked Code Acquired Company
	BusTub	2019	Relational	C++
	ByConity OLAP	2020	Relational	C++	OLAP
CA	Calvin Abandoned Project	2012	Relational	C++	Abandoned Project
	CedarDB OLAP Forked Code OLTP	2023	Relational, Array / Matrix	C++	OLAP Forked Code OLTP
	chDB OLAP Acquired Company AI-Assisted	2023	Relational	C++	OLAP Acquired Company AI-Assisted
	ClearDB Acquired Company	2010	Relational	C++	Acquired Company
	ClickHouse OLAP AI-Assisted	2016	Relational	C++	OLAP AI-Assisted
	CoGaDB Abandoned Project	2012	Relational	C++	Abandoned Project
	CompleteDB Abandoned Project OLTP	2012	Relational	C++	Abandoned Project OLTP
	Consus Abandoned Project	2015	Key/Value	C++	Abandoned Project
CO	CORAL	1988	—	C++
	Cosmos DB	2015	Key/Value, Graph, Column Family / Wide-Column	C++
	Couchbase NoSQL	2010	Key/Value, Document / XML	C++	NoSQL
CQ	CQL++ Failed Company	1994	Relational	C++	Failed Company
	CrossDB	2019	Relational	C++
	CruzDB	2016	—	C++
	C-Store Abandoned Project	2005	Relational	C++	Abandoned Project
DA	DataBlitz OLTP	1993	Relational	C++	OLTP
	Db2	1983	Document / XML, Relational	C++
	DBx1000 Abandoned Project	2014	Relational	C++	Abandoned Project
	DeepDB Abandoned Project Failed Company	2010	Relational	C++	Abandoned Project Failed Company
	DolphinDB Time-Series	2018	Relational	C++	Time-Series
	Doris OLAP AI-Assisted	2017	Relational	C++	OLAP AI-Assisted
	Dragonfly Cache AI-Assisted	2021	Key/Value	C++	Cache AI-Assisted
	Drizzle Forked Code Abandoned Project	2008	Relational	C++	Forked Code Abandoned Project
	DuckDB OLAP AI-Assisted	2018	Relational	C++	OLAP AI-Assisted
	DyBASE	—	Object-Oriented	C++
	Elliptics Abandoned Project	2009	Key/Value	C++	Abandoned Project
EM	EmbedDB Time-Series	2023	Relational	C++	Time-Series
	Endee AI-Assisted	2026	—	C++	AI-Assisted
	Epsilla Nearest Neighbor Search	2023	Array / Matrix	C++	Nearest Neighbor Search
	EsgynDB Failed Company	2015	Relational	C++	Failed Company
	EuclidesDB Abandoned Project	2018	Array / Matrix	C++	Abandoned Project
	EventQL OLAP Abandoned Project	2014	Relational	C++	OLAP Abandoned Project
EX	Extensible Storage Engine	1994	Key/Value	C++
	eXtremeDB Cache Time-Series OLTP Middleware	2001	Column Family / Wide-Column, Entity-Relationship, Key/Value, Relational	C++	Cache Time-Series OLTP Middleware
	EyeDB Abandoned Project	1992	Object-Oriented	C++	Abandoned Project
	FastDB	2011	Relational	C++
	FASTER	2018	Key/Value	C++
	FastObjects Acquired Company	1993	Object-Oriented	C++	Acquired Company
	Firebird AI-Assisted	2000	Relational	C++	AI-Assisted
FO	ForestDB Abandoned Project	2013	Key/Value	C++	Abandoned Project
	FoundationDB Acquired Company OLTP AI-Assisted	2009	Key/Value	C++	Acquired Company OLTP AI-Assisted
	FoxPro xBase	1984	Relational	C++	xBase
	Gaia Abandoned Project Failed Company	2020	Object-Oriented	C++	Abandoned Project Failed Company
	GenomicsDB	2016	Array / Matrix	C++
	GigaBASE	—	Relational	C++
GO	Google F1	2013	Relational	C++
	GreatSQL	2020	Relational	C++
	GridDB	2011	Key/Value	C++
	HANA	2010	Column Family / Wide-Column	C++
	HeavyDB OLAP Acquired Company Abandoned Project	2013	Relational	C++	OLAP Acquired Company Abandoned Project
	H-Store NewSQL Abandoned Project OLTP	2006	Relational	C++	NewSQL Abandoned Project OLTP
	HyPer OLAP Acquired Company OLTP	2010	Relational	C++	OLAP Acquired Company OLTP
	HyperDex Abandoned Project NoSQL	2011	Key/Value	C++	Abandoned Project NoSQL
	Hypertable Acquired Company Abandoned Project	2008	Column Family / Wide-Column	C++	Acquired Company Abandoned Project
	Hyrise OLAP	2009	Relational	C++	OLAP
	Impala OLAP AI-Assisted	2013	Relational	C++	OLAP AI-Assisted
	InfiniDB OLAP Abandoned Project Failed Company	2000	Relational	C++	OLAP Abandoned Project Failed Company
	InfiniSQL Abandoned Project OLTP	2013	Relational	C++	Abandoned Project OLTP
	InfiniteGraph	2010	Graph	C++
	Infinity Nearest Neighbor Search	2022	Relational	C++	Nearest Neighbor Search
	IQ Acquired Company	1992	Relational	C++	Acquired Company
	ITTIA DB Time-Series OLTP	2000	Relational	C++	Time-Series OLTP
	JaguarDB Nearest Neighbor Search	2017	Array / Matrix, Key/Value	C++	Nearest Neighbor Search
	Joedb	2014	Relational	C++
	JSqlDb	2017	Document / XML	C++
	KeyDB Acquired Company Abandoned Project NoSQL	2019	—	C++	Acquired Company Abandoned Project NoSQL
	Kinetica OLAP	2009	Relational	C++	OLAP
	Kudu OLTP	2016	Relational	C++	OLTP
	KurrentDB Time-Series AI-Assisted	2012	Document / XML	C++	Time-Series AI-Assisted
	Kuzu Acquired Company Abandoned Project Nearest Neighbor Search	2020	Graph	C++	Acquired Company Abandoned Project Nearest Neighbor Search
	Kvrocks NoSQL AI-Assisted	2019	Key/Value	C++	NoSQL AI-Assisted
	Kyoto Cabinet	2009	Key/Value	C++
	LadybugDB Forked Code Revival Project AI-Assisted	2025	Graph	C++	Forked Code Revival Project AI-Assisted
	LeanStore OLTP	2018	Key/Value	C++	OLTP
	LeanXcale OLAP OLTP	2010	Relational	C++	OLAP OLTP
	LevelDB MMAP	2011	Key/Value	C++	MMAP
	LightDB Abandoned Project	2017	Array / Matrix	C++	Abandoned Project
LI	LineairDB AI-Assisted	2020	Key/Value	C++	AI-Assisted
	LingoDB OLAP AI-Assisted	2021	Relational	C++	OLAP AI-Assisted
	LintDB Nearest Neighbor Search	2024	Vector	C++	Nearest Neighbor Search
	LogosDB AI-Assisted	2026	Vector	C++	AI-Assisted
	LucidDB OLAP Abandoned Project	2004	Relational	C++	OLAP Abandoned Project
	Manticore Search Search Engine	2017	Relational	C++	Search Engine
	MariaDB AI-Assisted	2009	Relational	C++	AI-Assisted
	MaxDB OLTP	1977	Relational	C++	OLTP
	Memgraph AI-Assisted	2016	Graph	C++	AI-Assisted
	MillenniumDB Web Browser	2021	Graph, Triplestore / RDF	C++	Web Browser
	MLDB Acquired Company	2015	—	C++	Acquired Company
MM	MMKV	2018	—	C++
	MongoDB NoSQL AI-Assisted	2009	Document / XML	C++	NoSQL AI-Assisted
	MyScaleDB OLAP Forked Code Failed Company AI-Assisted	2021	Relational	C++	OLAP Forked Code Failed Company AI-Assisted
	MySQL Acquired Company	1994	Relational	C++	Acquired Company
	Napa	2018	Relational	C++
	NarayanaDB	2025	—	C++
	NavDB Abandoned Project	2017	Key/Value, Relational	C++	Abandoned Project
ND	NDB Cluster Acquired Company OLTP	—	Key/Value	C++	Acquired Company OLTP
	Nebula Graph	2018	Graph	C++
	Netezza OLAP Acquired Company	1999	Relational	C++	OLAP Acquired Company
	Neug AI-Assisted	2026	Graph	C++	AI-Assisted
	NoisePage	2018	Relational	C++
	NuDB Abandoned Project	2016	Key/Value	C++	Abandoned Project
	NuoDB NewSQL Acquired Company	2010	Relational	C++	NewSQL Acquired Company
	ObjectBox Time-Series Nearest Neighbor Search MMAP Mobile NoSQL	2016	Object-Oriented	C++	Time-Series Nearest Neighbor Search MMAP Mobile NoSQL
	ObjectDatabase++	2003	Object-Oriented	C++
	ObjectStore Acquired Company	1988	Object-Oriented	C++	Acquired Company
	ObsessionDB OLAP Hosting Service	2024	Relational	C++	OLAP Hosting Service
	OceanBase	2010	Relational	C++
	ODABA	1994	Object-Oriented	C++
	OpenEdge OLTP	1984	Relational	C++	OLTP
	OpenMLDB	2017	Relational	C++
	Oracle RDBMS	1977	Key/Value, Graph, Triplestore / RDF, Document / XML, Relational	C++
PA	Paradise	1994	Object-Oriented	C++
	ParStream OLAP Acquired Company Abandoned Project	2010	Relational	C++	OLAP Acquired Company Abandoned Project
	PieCloudDB OLAP	2021	Relational	C++	OLAP
	Pika AI-Assisted	2014	Key/Value	C++	AI-Assisted
	PinusDB Abandoned Project	2019	Relational	C++	Abandoned Project
	Polyhedra Acquired Company	1994	Relational	C++	Acquired Company
	PosDB OLAP	2017	Relational	C++	OLAP
	PrimeBase OLTP	1990	Relational	C++	OLTP
	ProfaneDB Abandoned Project	2017	Object-Oriented	C++	Abandoned Project
	Proton Streaming AI-Assisted	2021	Relational	C++	Streaming AI-Assisted
	qikkDB OLAP Abandoned Project Failed Company	2019	Relational	C++	OLAP Abandoned Project Failed Company
	qlever	2014	—	C++
	Qserv AI-Assisted	2011	Relational	C++	AI-Assisted
	Quadrable Abandoned Project	2020	Key/Value	C++	Abandoned Project
	quasardb	2008	Key/Value	C++
	QuestDB Time-Series AI-Assisted	2014	Relational	C++	Time-Series AI-Assisted
	Quickstep OLAP Abandoned Project	2013	Relational	C++	OLAP Abandoned Project
	RageDB Abandoned Project	2021	Graph	C++	Abandoned Project
	RaimaDB Time-Series	1984	Network, Relational	C++	Time-Series
	Rasdaman	1989	Array / Matrix	C++
	Realm Acquired Company Abandoned Project Mobile	2011	Object-Oriented	C++	Acquired Company Abandoned Project Mobile
	Redshift OLAP Serverless	2012	Relational	C++	OLAP Serverless
	ReductStore Time-Series AI-Assisted	2021	Key/Value	C++	Time-Series AI-Assisted
	ResilientDB Blockchain	2019	Document / XML	C++	Blockchain
	RethinkDB Failed Company NoSQL	2009	Document / XML	C++	Failed Company NoSQL
	Rockall-DB	—	—	C++
	RocksDB Forked Code OLTP	2012	Key/Value	C++	Forked Code OLTP
	Rockset OLAP Acquired Company	2016	Relational	C++	OLAP Acquired Company
	RonDB OLTP AI-Assisted	2020	Key/Value, Relational	C++	OLTP AI-Assisted
	ScalienDB Abandoned Project Failed Company	2010	Key/Value	C++	Abandoned Project Failed Company
	SchoonerSQL Acquired Company OLTP	2007	Relational	C++	Acquired Company OLTP
	SciDB OLAP	2008	Array / Matrix	C++	OLAP
	Scylla NoSQL AI-Assisted	2014	Key/Value, Column Family / Wide-Column	C++	NoSQL AI-Assisted
	Sedna Abandoned Project	2003	Document / XML	C++	Abandoned Project
	SeekDB AI-Assisted	2025	—	C++	AI-Assisted
	SequoiaDB	2011	Document / XML	C++
	SereneDB OLAP OLTP Search Engine AI-Assisted	2024	Relational	C++	OLAP OLTP Search Engine AI-Assisted
	ShannonBase	2024	Relational, Vector	C++
SH	Shore Abandoned Project OLTP	1995	Object-Oriented	C++	Abandoned Project OLTP
SI	Silo Abandoned Project	2013	Relational	C++	Abandoned Project
	SingleStore OLAP NewSQL Acquired Company OLTP	2011	Document / XML, Key/Value, Multi-Value, Object-Oriented, Relational, Vector	C++	OLAP NewSQL Acquired Company OLTP
	Siodb Abandoned Project	2018	Relational	C++	Abandoned Project
	Sirius OLAP Query Engine AI-Assisted	2024	Relational	C++	OLAP Query Engine AI-Assisted
	Skyrise OLAP Serverless Query Engine	2019	Relational	C++	OLAP Serverless Query Engine
	SlothDB	2026	Relational	C++
	Snowflake OLAP	2013	Document / XML, Relational	C++	OLAP
	SpaceTime	2020	Relational	C++
	SparkleDB OLTP	2013	Graph	C++	OLTP
	Sparksee	2006	Graph, Object-Oriented	C++
	Sphinx Search Engine	2001	Document / XML	C++	Search Engine
	Splunk Acquired Company Search Engine	2002	Key/Value	C++	Acquired Company Search Engine
	SQL Server	1988	Relational	C++
	SQream OLAP	2010	Relational	C++	OLAP
	SRCH² Abandoned Project	2010	—	C++	Abandoned Project
	SSDB Abandoned Project	2013	Key/Value	C++	Abandoned Project
	StarRocks OLAP AI-Assisted	2021	Relational, Column Family / Wide-Column	C++	OLAP AI-Assisted
	Stig Abandoned Project Failed Company	2010	Graph	C++	Abandoned Project Failed Company
	SWC-DB Abandoned Project	2019	Column Family / Wide-Column, Key/Value	C++	Abandoned Project
	Tendis NoSQL	2018	Key/Value	C++	NoSQL
TE	Tera Abandoned Project	2014	Column Family / Wide-Column	C++	Abandoned Project
	TerarkDB Forked Code Acquired Company	2016	Key/Value	C++	Forked Code Acquired Company
	Theseus OLAP Failed Company	2022	Relational	C++	OLAP Failed Company
	ThruDB	2006	—	C++
	TigerGraph	2012	Graph	C++
	TileDB NoSQL	2014	Array / Matrix	C++	NoSQL
	Tkrzw DBM	2020	Key/Value	C++	DBM
	TokuMX Forked Code Acquired Company Abandoned Project	2013	Document / XML	C++	Forked Code Acquired Company Abandoned Project
	ToplingDB Forked Code AI-Assisted	2021	Key/Value	C++	Forked Code AI-Assisted
	Trafodion Abandoned Project	2014	Column Family / Wide-Column	C++	Abandoned Project
	TuGraph	2021	Graph	C++
	Umbra OLAP OLTP	2018	Array / Matrix, Relational	C++	OLAP OLTP
	UnumDB Abandoned Project Failed Company	2015	Document / XML, Graph, Key/Value, Array / Matrix	C++	Abandoned Project Failed Company
	upscaledb OLAP Abandoned Project	2007	Key/Value	C++	OLAP Abandoned Project
	Valentina Database OLTP	1998	Relational	C++	OLTP
	Vearch Nearest Neighbor Search Search Engine	2019	Document / XML, Vector	C++	Nearest Neighbor Search Search Engine
	Vector OLAP Acquired Company	2009	Relational	C++	OLAP Acquired Company
	Velox OLAP Query Engine AI-Assisted	2020	Relational	C++	OLAP Query Engine AI-Assisted
	Vertica OLAP Forked Code Acquired Company	2005	Relational	C++	OLAP Forked Code Acquired Company
	Vespa Search Engine AI-Assisted	1997	Document / XML	C++	Search Engine AI-Assisted
	ViyaDB OLAP Abandoned Project	2017	Relational	C++	OLAP Abandoned Project
	VoltDB NewSQL	2009	Relational	C++	NewSQL
	Weaviate Nearest Neighbor Search Search Engine MMAP AI-Assisted	2016	Vector	C++	Nearest Neighbor Search Search Engine MMAP AI-Assisted
	WebScaleSQL Forked Code Abandoned Project	2014	Relational	C++	Forked Code Abandoned Project
	Xapian Search Engine	2001	Document / XML	C++	Search Engine
	YDB NewSQL OLTP AI-Assisted	2014	Relational	C++	NewSQL OLTP AI-Assisted
	Yellowbrick OLAP	2014	Relational	C++	OLAP
	YTsaurus AI-Assisted	2010	—	C++	AI-Assisted
	YugabyteDB Forked Code OLTP AI-Assisted	2016	Key/Value, Relational	C++	Forked Code OLTP AI-Assisted
	ZeptoDB Time-Series AI-Assisted	2026	—	C++	Time-Series AI-Assisted