Firebase Authentication pricing
Alternative. Maturity: Established (12 months or more). Replaces Auth0, Clerk. Last checked 2026-10-20.
visit firebase.google.com/products/auth ↗ its pricing page ↗
Visitors who say they use Firebase Authentication: none yet. Self-reported, anonymous, and never used for order.
| plan | from $/mo | billed | source | checked |
|---|---|---|---|---|
| Spark | $0 | per monthly active user | pricing page | 2026-10-20 |
| Identity Platform | $0 | per monthly active user | pricing page | 2026-10-20 |
Spark: No-cost up to 50,000 monthly active users on the basic service.
Identity Platform: Upgrade of Firebase Auth, pay as you go: first 50,000 free, then $0.0055 each to 100,000, $0.0046 each to 1 million. SMS codes are charged per message. SAML and OIDC users: 50 free, then $0.015 each.
features recorded
| feature | status | from plan | note |
|---|---|---|---|
| Social login | yes | Spark | Google, Apple, Facebook, Twitter, GitHub and others. |
| Passwordless sign-in | yes | Spark | Email link sign-in. |
| Multi-factor authentication | yes | Identity Platform | Documented as needing the Identity Platform upgrade; the docs describe SMS as the second factor. |
| Custom domain | yes | Spark | The docs say you can configure the SDK to use your own custom domain as the authDomain, so sign-in happens on your own domain. |
| Passkeys | not stated | - | |
| Remove vendor branding | not stated | - | |
| User data export | not stated | - | |
| Organizations (teams) | yes | Identity Platform | Multi-tenancy needs the upgrade. |
| Roles and permissions | partial | Spark | Custom claims through the Admin SDK; you build the role model yourself. |
| Enterprise single sign-on (SAML) | yes | Identity Platform | SAML and OpenID Connect providers need the upgrade. |
| Automatic user provisioning (SCIM) | not stated | - | |
| Audit logs | yes | Identity Platform | User activity and audit logging needs the upgrade. |
| Machine-to-machine tokens | not stated | - | |
| Uptime guarantee (SLA) | not stated | - |
compare
- +Auth0 alternatives: how Firebase Authentication compares.
- +Clerk alternatives: how Firebase Authentication compares.
- +All authentication tools, including Auth0, Clerk, Kinde, Skapi, Supabase Auth.
switches
Reported switches to Firebase Authentication from other listed tools: none yet. Self-reported by visitors, shown as a raw count, and never used for ranking.
What people said they gave up (read first, one person's view each):
proof signals
- +A Google Cloud product
details
- hosting
- managed
- open source
- no