Supabase Auth vs Firebase Auth: Complete Authentication Comparison
Compare Supabase Auth and Firebase Auth on open-source, database integration, providers, and pricing. Discover which auth solution best fits your project.
Supabase Auth excels in PostgreSQL integration, open-source transparency, and a generous free tier. Firebase Auth offers more providers, a proven scale track record, and deep Google Cloud integration. The choice strongly depends on your database choice and existing ecosystem.
Supabase Auth
An open-source authentication solution built on GoTrue, integrated with PostgreSQL and Row Level Security. Supabase Auth offers email/password, magic links, OAuth providers, and phone authentication with direct database integration via auth.users.
Firebase Auth
Google's fully managed authentication service within the Firebase platform. Firebase Auth offers an extensive set of providers, anonymous authentication, multi-factor authentication, and deep integration with other Google Cloud services and Firestore security rules.
What are the key differences between Supabase Auth and Firebase Auth?
| Feature | Supabase Auth | Firebase Auth |
|---|---|---|
| Open-source | Fully open-source (GoTrue); self-hosting possible | Proprietary; only available as a Google service |
| Database integration | Direct PostgreSQL integration with RLS on auth.users | Decoupled from database; Firestore rules reference auth tokens |
| Providers | 20+ OAuth providers, email, phone, magic links | 30+ providers, anonymous auth, Game Center, Play Games |
| MFA | TOTP support; SMS verification as second factor | SMS, TOTP, and advanced MFA flows with Identity Platform |
| Pricing | Generous free tier (50,000 MAU); then pay-as-you-go | Free up to 10,000 verifications/month; Identity Platform for more |
What is the verdict on Supabase Auth vs Firebase Auth?
Supabase Auth excels in PostgreSQL integration, open-source transparency, and a generous free tier. Firebase Auth offers more providers, a proven scale track record, and deep Google Cloud integration. The choice strongly depends on your database choice and existing ecosystem.
Which option does MG Software recommend?
At MG Software, we choose Supabase Auth for most projects due to seamless PostgreSQL integration and Row Level Security. The direct coupling between auth and database policies significantly simplifies our architecture. We recommend Firebase Auth when clients are already deeply invested in the Google ecosystem.
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