Supabase vs Firebase

Firebase's biggest advantage is its real-time database and offline-first mobile SDKs. For consumer mobile apps where data needs to sync instantly across devices — think chat apps, collaborative tools, live dashboards — Firebase's Firestore and Realtime Database remain industry-leading. The Flutter and React Native SDKs are mature and battle-tested.

Supabase chose PostgreSQL as its foundation, and that decision pays dividends. Every Supabase project is a full Postgres database, which means you can use SQL, write complex joins, use foreign keys, install Postgres extensions (pgvector for AI, PostGIS for geo), and leverage any Postgres-compatible tooling. For developers coming from a traditional backend, Supabase feels immediately familiar.

The open source factor matters more than it might seem. Supabase is MIT-licensed and self-hostable — you can run the entire stack on your own infrastructure with no vendor dependency. Firebase is Google-proprietary; if Google discontinues a product (and they have a history of doing so), migration is painful. Multiple startups have migrated from Firebase to Supabase specifically to reduce this risk.

Feature parity is converging. Supabase now offers realtime subscriptions, Auth with social providers and MFA, Edge Functions (Deno), Storage, and a Vector database for AI embeddings. Firebase still leads on some mobile-specific features and has more mature offline support, but for most web application backends, Supabase covers everything you need.