Supabase

Supabase assembles the pieces of a backend around a Postgres database rather than a proprietary store. You get a database, authentication, generated APIs, file storage and functions, and the database underneath stays an ordinary Postgres you can query, migrate and take elsewhere.

The platform is a combination of separate open source tools instead of one monolith. PostgREST turns the schema into a REST API, pg_graphql exposes a GraphQL one, an Elixir service broadcasts inserts, updates and deletes over websockets, GoTrue handles JWT-based sign-ups and sessions, and a storage API manages files in S3 with Postgres enforcing the permissions.

That combination is what an application developer actually consumes.

• Generated APIs: REST, GraphQL and realtime subscriptions follow the schema as it changes.
• Auth: sign-up, login and session management, with authorization pushed down into the database.
• Functions: database functions for logic close to the data, edge functions for everything else.
• Vectors: an AI and embeddings toolkit sitting beside the relational data.
• Modular clients: libraries for JavaScript, Flutter and more, each underlying service also having a standalone client.

The stated policy is to adopt an existing tool whenever a suitably licensed one exists and to build and open source the missing piece otherwise. You can sign up for the hosted platform without installing anything, self-host the same stack, or develop locally against it. Documentation, a dashboard and several community support channels are maintained alongside the code.