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 BrokenPO Prisma Data, Inc. · Web frameworks & UI
TypeScript ORM with a declarative schema language, generated type-safe client and migration tooling, from the company that also offers Prisma Postgres and related hosted services
Apache-2.0 Open source Free Local Self-hosted Nov 2, 2026T Tiger Data (formerly Timescale) · Relational databases
PostgreSQL extension for time-series data adding hypertables, compression and continuous aggregates, from the company now named Tiger Data
Apache-2.0 AND LicenseRef-Timescale-License Open source Free Self-hosted Nov 2, 2026