Supabase Auth is bundled into the platform plans rather than sold as a standalone product. The Free plan includes 50,000 monthly active users, while paid plans such as Pro include 100,000 MAUs before Auth overage billing begins. Supabase also separates monthly active third-party users and monthly active SSO users into their own usage categories in the billing docs.
- Supabase's usage guides break out Monthly Active Users, Monthly Active Third-Party Users, and Monthly Active SSO Users as separate billable metrics.
- SMS and some phone-auth delivery charges may come through your own messaging provider accounts rather than Supabase directly.
- Auth usage is separate from database compute, disk, and egress, so a low-database workload can still generate meaningful Auth overages.
- Enterprise plans can customize quotas and SSO behavior, but the self-serve plans should be modeled against the published usage tables first.
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Identity platform for adding authentication, user management, SSO, and access control to apps.