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

1,198 Systems Ranked

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Country of Origin
1 United States of America 564
2 China 95
3 Germany 76
4 United Kingdom 63
5 Canada 38
6 France 35
7 Russia 31
8 India 26
9 Netherlands 24
10 Japan 20
Data Model
1 RE Relational 451
2 KE Key/Value 242
3 DO Document / XML 211
4 GR Graph 84
5 OB Object-Oriented 62
6 VE Vector 40
7 CO Column Family / Wide-Column 28
8 TR Triplestore / RDF 26
9 AR Array / Matrix 21
10 NE Network 10
Query Interface
1 CU Custom API 460
2 SQ SQL 403
3 HT HTTP / REST 142
4 CO Command-line / Shell 58
5 ST Stored Procedures 26
6 CY Cypher 19
7 SP SPARQL 18
8 PL PL/SQL 16
9 GR GraphQL 15
10 DA Datalog 15
Compatibility
1 PostgreSQL PostgreSQL 54
2 MySQL MySQL 43
3 Redis Redis 35
4 MongoDB MongoDB 18
5 Prometheus Prometheus 9
6 Oracle RDBMS Oracle RDBMS 7
7 Memcached Memcached 7
8 Neo4j Neo4j 6
9 RocksDB RocksDB 6
10 SQLite SQLite 6
Derived From
1 PostgreSQL PostgreSQL 37
2 MySQL MySQL 25
3 Redis Redis 9
4 RocksDB RocksDB 6
5 ClickHouse ClickHouse 6
6 Cassandra Cassandra 5
7 Elasticsearch Elasticsearch 4
8 LMDB LMDB 4
9 Spark SQL Spark SQL 4
10 Cloud BigTable Cloud BigTable 3
Embeds / Uses
1 RocksDB RocksDB 35
2 SQLite SQLite 21
3 LMDB LMDB 17
4 PostgreSQL PostgreSQL 15
5 Berkeley DB Berkeley DB 12
6 LevelDB LevelDB 11
7 MySQL MySQL 11
8 FoundationDB FoundationDB 7
9 DataFusion DataFusion 7
10 Cassandra Cassandra 6
Hosted Offerings
1 MySQL MySQL 6
2 PostgreSQL PostgreSQL 4
3 ClickHouse ClickHouse 4
4 SQL Server SQL Server 3
5 Db2 Db2 2
6 Redis Redis 2
7 Neo4j Neo4j 1
8 CouchDB CouchDB 1
9 Valkey Valkey 1
10 Memcached Memcached 1
Source Code License
1 PR Proprietary 335
2 AP Apache v2 298
3 MI MIT License 162
4 BS BSD License 61
5 AG AGPL v3 49
6 GP GPL v2 47
7 GP GPL v3 34
8 MO Mozilla Public License 17
9 BU Business Source License 16
10 LG LGPL v2 14
Implementation Language
1 C+ C++ 230
2 JA Java 161
3 C C 140
4 GO Go 114
5 RU Rust 109
6 PY Python 52
7 C# C# 35
8 JA JavaScript 34
9 ER Erlang 15
10 TY TypeScript 13
Project Type
1 OP Open Source 779
2 CO Commercial 591
3 HO Hobby 182
4 AC Academic 89
5 IN Industrial Research 19
6 ED Educational 9
7 IN Internal / Non-Public 9
Developers
1 IBM Corporation IBM Corporation 16
2 Google LLC Google LLC 16
3 Amazon.com, Inc. Amazon.com, Inc. 13
4 University of California, Berkeley University of California, Berkeley 11
5 Meta Platforms Inc Meta Platforms Inc 11
6 Massachusetts Institute of Technology Massachusetts Institute of Technology 10
7 Microsoft Corporation Microsoft Corporation 10
8 Oracle Corporation Oracle Corporation 9
9 SAP SE SAP SE 8
10 LinkedIn Corporation LinkedIn Corporation 8
Acquisitions
1 Oracle Corporation Oracle Corporation 10
2 Rocket Software, Inc. Rocket Software, Inc. 7
3 IBM Corporation IBM Corporation 7
4 SAP SE SAP SE 7
5 Actian Corporation Actian Corporation 4
6 Teradata Corporation Teradata Corporation 4
7 Microsoft Corporation Microsoft Corporation 4
8 Sybase Inc. Sybase Inc. 3
9 Cisco Cisco 3
10 Apple Inc. Apple Inc. 3