Supabase

Supabase, from Supabase Inc., is a Postgres development platform: a backend-as-a-service, which means a hosted set of server functions that an app uses instead of servers its own team runs. Every project is built around a full Postgres database, the open-source relational database that stores data in tables and is queried with SQL.

On top of the database, Supabase generates ready-to-use REST and GraphQL APIs, so an app can read and write tables directly. Auth handles sign-ups and logins (email and password, passwordless, OAuth and mobile), and Row Level Security rules in the database decide which user may see which rows. Storage keeps large files such as images and videos under the same access rules. Realtime pushes database changes to subscribed clients. Edge Functions run custom server code close to users, and a vector feature stores embeddings for AI search. Client libraries exist for JavaScript, Flutter, Python, C#, Swift and Kotlin.

Supabase is open source and can be self-hosted. The hosted service has a free plan and paid plans with a monthly fee plus charges for use above the included amounts.