Supabase vs Firebase

Supabase vs Firebase comparison for developers. Compare databases, authentication, pricing, and DX to choose the right backend-as-a-service platform.

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Verdict Rapide

Gagnant: Ça dépend

Supabase offers Postgres power with SQL flexibility and open-source benefits. Firebase provides a mature ecosystem with excellent realtime capabilities. For relational data needs and SQL preference, choose Supabase. For document-based apps with Google ecosystem integration, Firebase excels.

Choisissez Supabase si...

✓ You want a real Postgres database with SQL support
✓ Open source and self-hosting options matter to you
✓ You need complex queries, joins, and relational data
✓ You prefer REST/GraphQL over proprietary SDKs
✓ Vendor lock-in is a concern

Choisissez Firebase Firestore si...

✓ You need mature, battle-tested realtime sync
✓ You're building mobile-first with offline support
✓ You want tight Google Cloud/Analytics integration
✓ Document/NoSQL data model fits your use case
✓ You need Firebase Cloud Messaging or Crashlytics

Comparaison Fonctionnalité par Fonctionnalité

Catégorie	Supabase	Firebase Firestore	Gagnant
Pricing	Free: 500MB database, 1GB storage, 50k MAUs. Pro: $25/mo with generous limits.	Free: 1GB Firestore, 5GB storage. Blaze (pay-as-you-go) can get expensive at scale.	Supabase
Free Tier	500MB Postgres, 1GB storage, 2GB bandwidth, 50k auth MAUs, 500k edge function invocations.	1GB Firestore, 5GB storage, 10GB bandwidth, generous auth limits, Cloud Functions (limited).	Égalité
Developer Experience	SQL-based, great TypeScript support, auto-generated APIs, excellent dashboard.	Good SDK, but NoSQL quirks. Query limitations can be frustrating. Console is comprehensive.	Supabase
Documentation	Well-organized, practical examples, active community. Growing but comprehensive.	Extensive documentation, many tutorials. Can be overwhelming but very thorough.	Égalité
Scalability	Scales well with Postgres. Connection pooling included. Some growing pains at extreme scale.	Google infrastructure. Proven at massive scale. Firestore handles billions of documents.	Firebase Firestore
Features	Postgres database, Auth, Storage, Edge Functions, Realtime subscriptions, Row Level Security.	Firestore, Auth, Storage, Cloud Functions, Realtime Database, Hosting, ML Kit, Crashlytics.	Égalité

Comparaison de Code

Query with RLS

typescript

import { createClient } from '@supabase/supabase-js';

const supabase = createClient(url, anonKey);

// Row Level Security automatically filters by user
const { data, error } = await supabase
  .from('posts')
  .select('*, author:users(name)')
  .order('created_at', { ascending: false })
  .limit(10);

Supabase uses standard SQL with automatic API generation. RLS policies handle authorization.

Query with Security Rules

typescript

import { getFirestore, collection, query, where, orderBy, limit, getDocs } from 'firebase/firestore';

const db = getFirestore();

const q = query(
  collection(db, 'posts'),
  where('userId', '==', currentUser.uid),
  orderBy('createdAt', 'desc'),
  limit(10)
);

const snapshot = await getDocs(q);

Firebase uses a document-based query API. Security rules are defined separately in the console.

🔄 Notes de Migration

Migrating from Firebase to Supabase requires restructuring data from documents to relational tables. Supabase provides migration guides. Auth users can be exported/imported. Real-time logic needs rewriting.

Questions Fréquemment Posées

Can Supabase replace Firebase completely? ▼

For database, auth, storage, and functions - yes. However, Firebase has additional services like Crashlytics, Cloud Messaging, and ML Kit that Supabase doesn't offer.

Which is more cost-effective? ▼

Supabase is generally more cost-effective and predictable. Firebase costs can spike unexpectedly with read/write operations, especially with inefficient queries.

Is Supabase as reliable as Firebase? ▼

Supabase has excellent uptime and is used in production by many companies. While Firebase has a longer track record, Supabase is production-ready and well-supported.

Essayer Supabase

Open source Firebase alternative

Essayer Firebase Firestore

Google's NoSQL document database

⚖ Comparer dans l'Outil Interactif

Dernière mise à jour: January 11, 2026