Auth
An honest comparison to help you pick the right auth tool in 2026.
| Feature | Firebase Auth | Supabase Auth |
|---|---|---|
| Category | Auth | Auth |
| Free Tier | Yes | Yes |
| Paid Plan | Pay-as-you-go | Included with Supabase |
| Enterprise | Custom | Custom |
| Best For | Mobile and web developers already using Firebase who want tightly integrated authentication | Supabase users who want integrated auth that works seamlessly with Postgres row-level security |
| Feature 1 | Email/phone auth | Email/password |
| Feature 2 | Social providers | Magic links |
| Feature 3 | Anonymous auth | Social providers |
| Feature 4 | Custom claims | Row-level security |
| Feature 5 | Firebase integration | JWT tokens |
| Website | Firebase Auth | Supabase Auth |
Firebase Auth and Supabase Auth are both popular choices in the auth category, but they serve different types of developers. Firebase Auth is google's authentication service with email, phone, social logins, anonymous auth, and integration with Firebase ecosystem. Meanwhile, Supabase Auth is supabase's built-in auth with email/password, magic links, social providers, and row-level security integration.
Both tools offer free tiers, which means you can try each one before committing. Firebase Auth's paid plan starts at Pay-as-you-go, while Supabase Auth's starts at Included with Supabase.
Firebase Auth stands out with Email/phone auth and Anonymous auth, while Supabase Auth differentiates itself through Email/password and Magic links. The right choice depends on which capabilities matter most for your workflow. Ultimately, mobile and web developers already using Firebase who want tightly integrated authentication, while Supabase Auth is best for supabase users who want integrated auth that works seamlessly with Postgres row-level security.
Firebase Auth: Free tier available. Paid plans start at Pay-as-you-go. Enterprise pricing: Custom.
Supabase Auth: Free tier available. Paid plans start at Included with Supabase. Enterprise pricing: Custom.
Choose Firebase Auth if you value email/phone auth and social providers. Go with Supabase Auth if supabase users who want integrated auth that works seamlessly with Postgres row-level security. Both are solid auth options in 2026 — the best pick depends on your team size, budget, and technical requirements. We recommend trying both (especially if they have free tiers) before committing to one.
Not sold on either Firebase Auth or Supabase Auth? Check out these other auth tools:
See all Firebase Auth alternatives or Supabase Auth alternatives.
Read more about auth on our Vibe Coding page.
Get the latest developer tool comparisons, reviews, and recommendations.