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 tier
- Hobby: free, no credit card required
- 50,000 monthly retained users per app
- Up to 3 social connections, email codes, magic links, passwords
- Custom domain, basic bot and brute-force protection
Paid plans: Pro: $25/month ($20/month billed annually)
Best for
Next.js / React apps that want polished auth UI in minutes.
Watch out: On Hobby, MFA, passkeys and removing the "Secured by Clerk" branding are not included, and session lifetime is fixed at 7 days.
Sources
Checked on 2026-11-11. Vendors change pricing often, so confirm on the official page before you commit.