Firebase vs Supabase
Firebase and Supabase both answer the same question: where does your data live? Google's mobile-first backend with a document store, realtime sync, offline support and push notifications in one bundle. Managed Postgres bundled with auth, storage, realtime and an auto-generated REST and client API. Supabase covers more of the ecosystem, so it survives a change of framework; Firebase is the better fit while you stay where it is strongest.
Verdict
Supabase covers more of the ecosystem, so it survives a change of framework; Firebase is the better fit while you stay where it is strongest.
Pick Firebase if
- ✓Offline persistence and conflict handling on mobile are genuinely solved problems here.
- ✓Push notifications, crash reporting and analytics come from the same console.
- ✓Realtime listeners make collaborative and chat-style features straightforward.
Pick Supabase if
- ✓Real Postgres underneath, so extensions, SQL and standard tooling all apply.
- ✓Auth, storage and realtime included, which removes several vendor decisions at once.
- ✓Client libraries let simple apps query straight from the browser safely.
| Comparison | Firebase | Supabase |
|---|---|---|
| Pricing shape | Free Spark tier, then pay as you go priced mainly on document reads, writes and stored data. | Free tier for hobby projects, then a flat per-project fee plus usage for compute, storage and bandwidth. |
| Frameworks | Next.js, React Native, Expo, Flutter | Next.js, SvelteKit, Nuxt, React Native, Expo, Flutter |
| In one line | Google's mobile-first backend with a document store, realtime sync, offline support and push notifications in one bundle. | Managed Postgres bundled with auth, storage, realtime and an auto-generated REST and client API. |
Pricing described qualitatively because published plans change often. Checked 2026-08-23. Confirm current terms on Firebase and Supabase.
Firebase
Strengths
- ✓Offline persistence and conflict handling on mobile are genuinely solved problems here.
- ✓Push notifications, crash reporting and analytics come from the same console.
- ✓Realtime listeners make collaborative and chat-style features straightforward.
- ✓Very long track record, so mobile developers already know the patterns.
Tradeoffs
- ✗Document model punishes relational data, pushing you toward heavy denormalization.
- ✗Billing counts document reads, so a careless listener can cost real money.
- ✗Security rules are a separate language with their own testing story.
- ✗Deep Google Cloud coupling makes leaving a full backend rewrite.
Supabase
Strengths
- ✓Real Postgres underneath, so extensions, SQL and standard tooling all apply.
- ✓Auth, storage and realtime included, which removes several vendor decisions at once.
- ✓Client libraries let simple apps query straight from the browser safely.
- ✓Open source core, so self-hosting is a genuine escape hatch.
Tradeoffs
- ✗Querying from the client pushes authorization into policies that are easy to misconfigure.
- ✗The bundled services encourage coupling that is painful to untangle later.
- ✗Dashboard-driven changes can drift from what is in your migration files.
- ✗Connection pooling behaviour surprises people moving from a classic long-lived server.
Frequently asked questions
Is Firebase or Supabase better?
Neither is better in the abstract. Supabase covers more of the ecosystem, so it survives a change of framework; Firebase is the better fit while you stay where it is strongest. Pick the one whose downside you can absorb, because both upsides are real.
What is the main drawback of Firebase?
Document model punishes relational data, pushing you toward heavy denormalization. Billing counts document reads, so a careless listener can cost real money.
What is the main drawback of Supabase?
Querying from the client pushes authorization into policies that are easy to misconfigure. The bundled services encourage coupling that is painful to untangle later.
Can you switch from one to the other later?
Usually, at a cost that grows with how much of your product leans on the database layer. Keep the integration behind a thin module of your own and the migration stays a weekend rather than a quarter.