Supabase vs Firebase: which backend-as-a-service should you choose?
Quick Answer: Supabase is an open-source Firebase alternative built on PostgreSQL with relational queries, row-level security, and SQL-based querying; it suits developers who prefer SQL and relational data. Firebase (by Google) uses Firestore (NoSQL document database) with real-time listeners and tight integration with Google Cloud; it suits mobile-first and real-time apps. Supabase wins on SQL and open-source; Firebase wins on ecosystem and real-time features.
Supabase vs Firebase
Both are backend-as-a-service (BaaS) platforms that provide authentication, database, storage, and serverless functions. The fundamental difference is relational (Supabase) vs NoSQL document (Firebase).
Supabase
- Open-source, launched 2020
- Built on PostgreSQL
- Row-level security (RLS)
- Realtime via PostgreSQL replication
- Edge Functions (Deno runtime)
- Self-hostable
- Pricing: Free (2 projects); Pro $25/month; Team $599/month
Firebase
- Google-owned, launched 2011 (acquired 2014)
- Firestore (NoSQL document) and Realtime Database
- Tight Google Cloud integration
- Cloud Functions (Node.js, Python, Go)
- Not self-hostable
- Pricing: Spark free plan; Blaze plan pay-as-you-go
Feature Comparison
| Feature | Supabase | Firebase |
|---|---|---|
| Database | PostgreSQL (SQL) | Firestore (NoSQL) |
| Query model | SQL, joins, views | NoSQL queries, limited joins |
| Realtime | PostgreSQL changes | Native real-time listeners |
| Auth | Yes (with OAuth providers) | Yes (with OAuth providers) |
| Storage | Yes (S3-compatible) | Cloud Storage |
| Serverless functions | Edge Functions (Deno) | Cloud Functions |
| Self-hosting | Yes | No |
| Mobile SDKs | JS, Flutter, Swift, Kotlin | JS, iOS, Android, Flutter, Unity |
| Open-source | Yes | No |
When Supabase Wins
- SQL-native teams
- Relational data with joins
- Open-source or self-hosting requirement
- PostgreSQL ecosystem (extensions, tooling)
When Firebase Wins
- Mobile-first applications
- Real-time collaborative features (chat, presence)
- Deep Google Cloud integration
- Existing AdMob, Analytics, or Crashlytics usage
Cost at Scale
Cost comparisons are workload-dependent:
- Supabase: predictable per-project tier
- Firebase: usage-based across reads, writes, storage, functions
For read-heavy apps at scale, Firebase can become expensive without careful read optimization; Supabase's flat tiers are often more predictable.
Migration Considerations
- Migrating from Firebase to Supabase requires data model redesign (document → relational)
- Migrating auth and storage requires re-issuing user tokens and re-uploading files
- Tools like
supabase-firebase-migratorexist but handle simple cases only
Related Questions
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ETL & Data PipelinesActivepieces
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Workflow AutomationAutomatisch
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