Supabase Auth free tier and limits
The auth service built into every Supabase project: email/password, magic links, OAuth providers and anonymous sign-ins, tied directly to Row Level Security.
What the free plan gives you
- 50,000 monthly active users on the Free plan
- Social OAuth providers, anonymous sign-ins, basic MFA
- Custom SMTP server supported
Best for
Apps already on Supabase, especially from Lovable.
Watch out
Leaked-password protection is a Pro feature. After deploying, update the Site URL and Redirect URLs, or confirmation emails will still point at localhost.
Fix guides that use Supabase Auth
Other auth options
Clerk
Drop-in authentication and user management with prebuilt sign-in, sign-up and profile UI components. Bills on monthly retained users instead of raw sign-ups.
Free Hobby: free, no credit card required
Auth0
Okta's hosted identity platform: universal login, social and passwordless sign-in, organizations and enterprise connections.
Free Free plan: up to 25,000 monthly active users, no credit card to sign up
Better Auth
An open-source TypeScript authentication framework that runs inside your own app and database. Plugins add 2FA, passkeys, magic links, organizations, SSO and more.
Free Open-source library: no per-user fees when self-hosted