An honest, experience-based comparison of Supabase and Firebase for backend-as-a-service projects. We have shipped production systems with both — here is what we learned.
Supabase vs Firebase — quick verdict: Supabase is better for SQL-first teams who want PostgreSQL. Firebase is better for real-time apps and teams who want a fully managed Google ecosystem. Both dramatically reduce backend development time. ZTABS has shipped production systems with both Supabase and Firebase. Below is our honest, experience-based comparison. Need help choosing? Get a free consultation →
3
Supabase Wins
0
Ties
3
Firebase Wins
Supabase
10/10
Firebase
6/10
Supabase uses PostgreSQL — the most capable open-source database. Firebase uses Firestore, a NoSQL document database with limited querying. For relational data, Supabase wins decisively.
Supabase
7/10
Firebase
10/10
Firebase was built for real-time: Firestore syncs data across clients instantly. Supabase has real-time subscriptions via PostgreSQL but it is not as deeply integrated.
Supabase
9/10
Firebase
3/10
Supabase is open-source and self-hostable. Your data is in standard PostgreSQL. Firebase is proprietary — migrating away from Firestore requires a complete rewrite.
Supabase
7/10
Firebase
10/10
Firebase has battle-tested mobile SDKs for iOS, Android, Flutter, and React Native with offline support, push notifications, and crash reporting. Supabase mobile support is growing but less mature.
Supabase
8/10
Firebase
9/10
Firebase Auth is one of the most mature authentication services available. Supabase Auth (GoTrue) is excellent and improving rapidly but Firebase has more social login providers.
Supabase
9/10
Firebase
6/10
Supabase's pricing is more transparent and predictable. Firebase pricing can spike unexpectedly with Firestore reads — many developers have been surprised by bills.
SaaS apps benefit from relational data, SQL queries, and Supabase's row-level security for multi-tenancy.
Firebase's real-time syncing and mature mobile SDKs are purpose-built for real-time mobile experiences.
Supabase's generous free tier, PostgreSQL foundation, and no vendor lock-in make it ideal for MVPs.
Firebase Realtime Database and Firestore handle real-time leaderboards and player data seamlessly.
The best technology choice depends on your specific context: team skills, project timeline, scaling requirements, and budget. We have built production systems with both Supabase and Firebase — talk to us before committing to a stack.
We do not believe in one-size-fits-all technology recommendations. Every project we take on starts with understanding the client's constraints and goals, then recommending the technology that minimizes risk and maximizes delivery speed.
Our senior architects have shipped 500+ projects with both technologies. Get a free consultation — we will recommend the best fit for your specific project.