CATEGORY · 3 SERVICES

Authentication & security

Compare included quotas, restrictions and official provider documentation.

Ongoing free allowance
Authentication & security

Auth0 Free

Up to 25,000 monthly active users; one custom domain and five organizations

Credit card not required to sign up; custom-domain feature requires card verification; tenant and connection limits apply.

Card: Not requiredView details
Ongoing free allowance
Authentication & security

Clerk Hobby

50,000 monthly retained users per app; unlimited applications

MRU is not equivalent to monthly active users; free plan has limited dashboard seats and short log retention.

Card: Not requiredView details
Ongoing free allowance
Authentication & security

Cloudflare Turnstile Free

Up to 20 widgets/account; unlimited challenges; 10 hostnames/widget

Free tier has 7-day analytics lookback; remove-branding and advanced controls are Enterprise-only.

Card: Check providerView details