M Oracle · Relational databases
Oracle's widely deployed open-source relational database server, offered as a GPL community edition and commercial enterprise and cloud editions
GPL-2.0-only WITH Universal-FOSS-exception-1.0 Open source Free Self-hosted BrokenP PostgreSQL Global Development Group · Relational databases
In-depth entry Open-source object-relational database server with a large extension ecosystem (PostGIS, pgvector, TimescaleDB) and broad SQL coverage
PostgreSQL Open source Free Local Self-hosted BrokenS Supabase Inc. · Relational databases
Open-source backend platform built around a dedicated PostgreSQL database with auto-generated APIs, authentication, file storage, realtime subscriptions and edge functions
Apache-2.0 Open source Freemium Self-hosted Nov 2, 2026