Supabase vs Firebase
Supabase is the open-source Firebase alternative built on Postgres. Firebase is Google's backend-as-a-service with NoSQL. Two different philosophies for building apps fast.
Updated 2026-02 · 2026
Supabase
Open-source backend with Postgres, auth, and realtime
Strengths
- +Full Postgres database with SQL, joins, and real relational data
- +Open source, so you can self-host and avoid vendor lock-in
- +Auth, storage, edge functions, and realtime all included
Weaknesses
- -Realtime subscriptions are not as battle-tested as Firebase
- -Edge functions are still maturing compared to Cloud Functions
- -Smaller ecosystem and fewer tutorials than Firebase
Best for
Developers who want a real Postgres database with a modern developer experience and the freedom to self-host.
Firebase
Google's backend-as-a-service for web and mobile apps
Strengths
- +Realtime database and Firestore are proven at massive scale
- +Huge ecosystem with extensive docs, tutorials, and community
- +Push notifications, analytics, and crashlytics built in
Weaknesses
- -NoSQL means no joins, no relations, and lots of data duplication
- -Vendor lock-in is severe. Migrating off Firebase is painful
- -Pricing can spike unexpectedly with read/write-heavy workloads
Best for
Mobile-first teams that want a proven, Google-backed backend with realtime sync, push notifications, and analytics.
Feature Comparison
| Feature | ||
|---|---|---|
| Database type | PostgreSQL (relational) | Firestore (NoSQL) |
| Auth | Built in, flexible | Built in, mature |
| Realtime | Postgres changes | Native, battle-tested |
| Storage | S3-compatible | Google Cloud Storage |
| Functions | Edge Functions (Deno) | Cloud Functions (Node.js) |
| Open source | Yes, fully | No |
| Self-hosting | Yes | No |
| Vendor lock-in | Low, it is Postgres | High, proprietary APIs |
The Verdict
Supabase is the better choice if you value data modeling, SQL, and avoiding lock-in. Having a real Postgres database gives you flexibility that NoSQL simply cannot match. Firebase wins for mobile apps that need proven realtime sync and push notifications out of the box. If you are starting a new web project today, Supabase is probably the smarter bet for long-term flexibility.
Beyond both: self-host PocketBase
Entire backend in a single Go binary. SQLite database, auth, realtime subscriptions, and file storage. Download one file, run it, done. No infrastructure to manage.
pocketbase.io →