Supabase vs Firebase: Open Source Postgres or Google Ecosystem?
Your database model decides everything. Supabase brings PostgreSQL power with Row Level Security; Firebase excels at offline-first NoSQL sync for mobile apps.
Supabase and Firebase serve similar use cases but with fundamentally different approaches. Supabase builds on PostgreSQL, offering the power of a full relational database with SQL, joins, and transactions, making it ideal for applications with complex data relationships. Firebase excels at real-time synchronization and offline support for mobile apps, backed by Google's proven infrastructure. The choice depends on your data model: relational and SQL-centric points to Supabase, while document-based with offline-first points to Firebase.
Supabase
An open-source Backend-as-a-Service built on PostgreSQL. Supabase provides a full relational database with Row Level Security, real-time subscriptions, edge functions, and an auto-generated REST and GraphQL API. The platform is fully self-hostable and has rapidly grown as the most popular open-source alternative to Firebase.
Firebase
Google's fully managed Backend-as-a-Service platform featuring Firestore (NoSQL document database), real-time synchronization, offline caching, Authentication, Cloud Functions, and Firebase Hosting. Firebase is deeply integrated into the Google Cloud ecosystem and is used by millions of applications worldwide.
What are the key differences between Supabase and Firebase?
| Feature | Supabase | Firebase |
|---|---|---|
| Database type | PostgreSQL (relational, SQL) with full SQL support | Firestore (NoSQL document model) with hierarchical collections |
| Real-time | Real-time subscriptions via PostgreSQL CDC (Change Data Capture) | Native real-time synchronization with automatic offline caching |
| Authentication | Built-in auth with RLS integration, 30+ OAuth providers | Firebase Auth with email, phone, social login, and anonymous auth |
| Self-hosting | Fully self-hostable via Docker, giving you complete control over data | Only available as a managed service via Google Cloud |
| Security model | Row Level Security at database level using SQL policies | Firestore Security Rules with a custom rule language |
| Pricing | Free tier with 500 MB database, then pay-as-you-go | Spark plan free, Blaze plan based on consumption |
When to choose which?
Choose Firebase when...
Choose Firebase when your application prioritizes offline-first functionality with seamless real-time synchronization, especially for mobile apps. Firebase is also the stronger choice when you need deep integration with Google Cloud services like Cloud Functions, BigQuery, and Google Analytics.
What is the verdict on Supabase vs Firebase?
Supabase and Firebase serve similar use cases but with fundamentally different approaches. Supabase builds on PostgreSQL, offering the power of a full relational database with SQL, joins, and transactions, making it ideal for applications with complex data relationships. Firebase excels at real-time synchronization and offline support for mobile apps, backed by Google's proven infrastructure. The choice depends on your data model: relational and SQL-centric points to Supabase, while document-based with offline-first points to Firebase.
Which option does MG Software recommend?
At MG Software, we use Supabase as our primary Backend-as-a-Service. The combination of PostgreSQL, Row Level Security, and an open-source architecture aligns perfectly with our vision on data sovereignty and long-term flexibility. We build applications with Supabase edge functions and real-time subscriptions for modern web and mobile apps. For clients with existing Firebase projects, we offer migration paths to Supabase, unlocking the benefits of a relational database without sacrificing development speed.
Migrating: what to consider?
Migrating from Firebase to Supabase requires restructuring Firestore documents into relational tables with proper schema design. Authentication users can be exported and imported, but Firestore Security Rules need to be rewritten as PostgreSQL Row Level Security policies. Plan for a phased migration approach.
Frequently asked questions
Related articles
MongoDB vs PostgreSQL: Flexible Documents or Relational Strength?
Documents or tables? MongoDB offers schema flexibility, PostgreSQL offers ACID guarantees plus JSONB. Which database matches your data model?
Supabase vs Appwrite: Which Open Source BaaS Fits Your Stack?
Both are open-source BaaS, but Supabase builds on PostgreSQL while Appwrite uses MariaDB with multi-runtime functions. See which suits your stack.
Neon vs Supabase: Serverless PostgreSQL Comparison
Neon excels at database branching and scaling to zero, Supabase offers a complete platform with auth, storage, and realtime. Pure database versus full BaaS.
BaaS platforms sized for mobile realtime, offline, and auth
Your mobile backend determines scalability and iteration speed. We compare 6 mobile BaaS platforms on realtime sync, offline support, and auth integration.