Databases with Heaps Storage Organization


	Adaptive Server Enterprise Acquired Company	1987	Relational	Heaps	Acquired Company
	Akiban Acquired Company Abandoned	2009	—	Heaps	Acquired Company Abandoned
	AlloyDB OLAP Forked Code OLTP	2022	Relational	Heaps	OLAP Forked Code OLTP
	Amelie OLTP	2023	Relational	Heaps	OLTP
	ArcadeDB Forked Code AI-Assisted	2021	Document / XML, Graph, Key-Value, Relational	Heaps	Forked Code AI-Assisted
	BoJack Abandoned	2016	Key-Value	Heaps	Abandoned
	BusTub	2019	Relational	Heaps
	CedarDB OLAP Forked Code OLTP	2023	Relational, Array / Matrix	Heaps	OLAP Forked Code OLTP
	Column Abandoned	2021	Relational	Heaps	Abandoned
	Cubrid AI-Assisted	2008	Relational	Heaps	AI-Assisted
	Derby Acquired Company Abandoned OLTP	1997	Relational	Heaps	Acquired Company Abandoned OLTP
	Epsilla Nearest Neighbor	2023	Array / Matrix	Heaps	Nearest Neighbor
	evitaDB AI-Assisted	2020	Document / XML	Heaps	AI-Assisted
	FerretDB AI-Assisted	2021	Document / XML	Heaps	AI-Assisted
	Firebird AI-Assisted	2000	Relational	Heaps	AI-Assisted
	FirstSQL/J Failed Company	2001	Relational	Heaps	Failed Company
GA	Gamma OLAP Abandoned OLTP	1986	Relational	Heaps	OLAP Abandoned OLTP
	Gel OLAP AI-Assisted	2018	Relational	Heaps	OLAP AI-Assisted
	Glowdust Abandoned	2023	Relational	Heaps	Abandoned
	HampusDB	2006	Key-Value	Heaps
	H-Store NewSQL Abandoned OLTP	2006	Relational	Heaps	NewSQL Abandoned OLTP
	HyperSQL	2001	Relational	Heaps
	Illustra Acquired Company OLTP	1992	Relational	Heaps	Acquired Company OLTP
	Ingres Acquired Company	1974	Relational	Heaps, Indexed Sequential Access Method (ISAM)	Acquired Company
	jasonisnthappy OLTP	2025	Document / XML	Heaps	OLTP
	KenobiDB Abandoned Middleware	2019	Document / XML	Heaps	Abandoned Middleware
	Kronotop NoSQL	2023	Document / XML	Heaps	NoSQL
	LungoDB	2019	Document / XML	Heaps
	MammothDB OLAP Acquired Company	2012	Relational	Heaps	OLAP Acquired Company
	Multigres Middleware AI-Assisted	2025	Relational	Heaps	Middleware AI-Assisted
ND	NDB Cluster Acquired Company OLTP	—	Key-Value	Heaps	Acquired Company OLTP
	NeDB Abandoned	2013	Document / XML	Heaps	Abandoned
	nessDB Abandoned	2011	Key-Value	Heaps	Abandoned
	NoisePage Abandoned	2018	Relational	Heaps	Abandoned
	OasysDB Abandoned Nearest Neighbor	2023	Key-Value, Vector	Heaps	Abandoned Nearest Neighbor
	OceanBase	2010	Relational	Heaps
	Oracle Multi-Model	1977	Document / XML, Graph, Key-Value, Relational, Triplestore / RDF	Heaps	Multi-Model
	Oracle NoSQL NoSQL	2011	Key-Value	Heaps	NoSQL
	OrientDB Multi-Model Acquired Company NoSQL	2010	Document / XML, Graph, Key-Value, Object-Oriented	Heaps	Multi-Model Acquired Company NoSQL
	ParadeDB OLAP Nearest Neighbor Search Engine AI-Assisted	2023	Relational	Heaps	OLAP Nearest Neighbor Search Engine AI-Assisted
	Percona Server Forked Code	2006	Relational	Heaps	Forked Code
	Pinot OLAP AI-Assisted	2014	Relational	Heaps	OLAP AI-Assisted
	PostgreSQL OLTP	1986	Relational	Heaps	OLTP
	PupDB Abandoned	2019	Key-Value	Heaps	Abandoned
	PysonDB Abandoned NoSQL	2020	Document / XML	Heaps	Abandoned NoSQL
	RaptorDB Forked Code	2024	Relational	Heaps	Forked Code
	RavenDB MMAP NoSQL AI-Assisted	2009	Document / XML, Key-Value	Heaps	MMAP NoSQL AI-Assisted
	RedDatabase Forked Code	2006	Relational	Heaps	Forked Code
	Redshift OLAP Serverless	2012	Relational	Heaps, Sorted Files	OLAP Serverless
	SchoonerSQL Acquired Company OLTP	2007	Relational	Heaps	Acquired Company OLTP
	Swarm64 OLAP Acquired Company	2013	Relational	Heaps	OLAP Acquired Company
SY	System R OLTP	1972	Relational	Heaps	OLTP
	TabDB Parody / Joke Abandoned	2019	Relational	Heaps	Parody / Joke Abandoned
	Tibero OLTP	2003	Relational	Heaps	OLTP
	Tkrzw Abandoned DBM	2020	Key-Value	Heaps	Abandoned DBM
	Tokyo Cabinet DBM	2006	Key-Value	Heaps	DBM
	TransLattice NewSQL Failed Company	2007	Relational	Heaps	NewSQL Failed Company
VA	Valthree Cache NoSQL	2025	Key-Value	Heaps	Cache NoSQL
	Vector OLAP Acquired Company	2009	Relational	Heaps, Indexed Sequential Access Method (ISAM)	OLAP Acquired Company
	Vitess Middleware AI-Assisted	2011	Relational	Heaps	Middleware AI-Assisted
	WiredTiger Acquired Company AI-Assisted	2008	Key-Value	Log-structured, Heaps	Acquired Company AI-Assisted
	Xata Forked Code AI-Assisted	2020	Relational	Copy-on-Write / Shadow Paging	Forked Code AI-Assisted
	Zentropy	2025	Key-Value	Heaps