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 2026-09 · 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.
How to switch from Supabase to Firebase
- 1Export your Supabase database with `supabase db dump --data-only` (or a full dump) to get a .sql file, or download a backup from Database > Backups in the dashboard.
- 2Convert your relational schema into a document-based structure by denormalizing tables into Firestore collections, since Firestore has no joins or foreign keys.
- 3Write a migration script using the Firebase Admin SDK to read your exported SQL/CSV data and batch-write it into Firestore collections, or bulk-import via a GCS bucket for larger datasets.
- 4Export your Supabase Auth users through the Auth Admin API and import them into Firebase Authentication using the `firebase auth:import` CLI command, preserving hashed passwords where possible.
- 5Rebuild your Postgres row-level security policies as Firestore Security Rules, testing each collection's read/write rules against your actual access patterns before going live.
- 6Point your app's client SDK and environment variables at Firebase, run both backends in parallel on a staging environment to validate behavior, then cut over the team and decommission the Supabase project.
Supabase vs Firebase: common questions
How do I export my data from Supabase?+
Use the Supabase CLI command `supabase db dump` to get a full Postgres SQL dump, or download a backup file directly from the Database > Backups tab in the dashboard (Pro plan and up). For a quick manual export, the Table Editor also lets you export individual tables as CSV.
What do I lose moving from Supabase to Firebase?+
You lose SQL joins, foreign keys, and relational integrity since Firestore is a NoSQL document store, so you'll need to denormalize your schema. You also lose the ability to self-host and the option to write access rules in plain SQL, since Firestore uses its own security rules language instead.
Is Firebase's free tier enough for a small team?+
The Spark plan gives you 1GB of Firestore storage, 10GB/month of network egress, and 50,000 document reads plus 20,000 writes per day, which is fine for a low-traffic MVP or internal tool. Once you add real users or heavier read/write patterns, you'll likely need to move to the pay-as-you-go Blaze plan.
Does Firebase integrate with the tools we already use?+
Firebase integrates natively with other Google Cloud services (BigQuery, Cloud Functions, Google Analytics) and has official SDKs for iOS, Android, and web. Third-party integrations via Zapier or Make exist but are more limited than what you get with a direct Postgres connection in Supabase.
Will switching to Firebase cost more over time?+
It depends on your usage pattern. Firestore's per-read/per-write pricing on the Blaze plan can get expensive fast for apps with heavy query volume or large listener-based realtime usage, whereas Supabase's flat $25/mo Pro tier is more predictable until you outgrow the included compute and storage. Read-heavy apps with unoptimized queries are the most common cause of Firebase bill surprises.
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 →Related comparisons
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