Supabase

Supabase is built on a portable PostgreSQL database, while Firebase uses NoSQL, so Supabase gives you standard SQL, relational data, and Postgres features like row-level security. It provides authentication, auto-generated REST and GraphQL APIs, edge functions, file storage, real-time subscriptions, and vector embeddings. This makes it a strong open-source alternative for developers who prefer SQL and portability.

All of Supabase technology is available for self-hosting, so you can run the full platform on your own infrastructure and avoid vendor lock-in. The managed cloud offering lets you set up a project in minutes. Both paths share the same PostgreSQL core, which makes moving between them straightforward.

Supabase ships as a complete backend: authentication with row-level security, auto-generated REST and GraphQL APIs, edge functions for serverless logic, file storage for large assets, real-time subscriptions for multiplayer features, and vector embeddings support for AI applications. Official client libraries cover Next.js, React, Vue, Flutter, and many other frameworks.