The best Auth0 alternatives for founders. Auth tools compared - Clerk, Supabase Auth, Firebase Auth, and more.
Auth0 handles every authentication edge case imaginable. Enterprise SSO, custom rules, multi-tenant - it's all there. But for most startups, it's overkill and expensive once you pass the free tier. These alternatives give you solid auth with better DX and more reasonable pricing.
| Tool | Pricing | Verdict | Best Stage |
|---|---|---|---|
| Auth0 | Freemium | - | - |
| Clerk | Freemium | - | - |
| Supabase Auth | Free | - | - |
| Firebase Auth | Free | - | - |
Enterprise auth that handles every edge case. Overkill for side projects, essential for serious apps.
Visit Auth0 →
Drop-in auth with beautiful components. User management UI that actually looks good out of the box.
Auth0 vs Clerk → Visit Clerk →
Free auth that comes with Supabase. Social logins, magic links, RLS. No-brainer if you're there.
Visit Supabase Auth →
Google's auth service. Dead simple setup, tons of providers, free tier handles most startups. The easy button.
Visit Firebase Auth →Want to explore all 301+ tools we've reviewed?
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