Compare two auth products bundled into broader BaaS suites — open-source Postgres-backed sessions versus Google's managed identity stack.
Use Supabase Auth when you want users in your own Postgres tables, row-level security on the same engine, and a credible self-host path. Use Firebase Auth when you're already on Firebase, ship a lot of native mobile, and don't mind tying identity to Google's stack.
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| Attribute | Supabase Auth | Firebase Auth |
|---|---|---|
| Category | Authentication | Authentication |
| Pricing Model | open-source | freemium |
| Starting Price | Free | Free |
| Free Tier | Yes | Yes |
| Open Source | Yes | No |
| Platforms | — | — |
