Auth0 alternatives
Auth0 is already the cheapest auth provider we track at 10,000 monthly active users (free). Here's how the other 2 compare. The closest match, Clerk, covers 91% of what Auth0 does. Each one shows how much of it it covers, capability by capability, next to the price.
What Auth0 does
Core: End-user sign-up & login, Social login, Prebuilt login UI (partly), Custom auth flows, Enterprise SSO.
Important: Magic links & one-time codes, Passkeys, Multi-factor authentication, Organizations & multi-tenancy, Roles & permissions, M2M tokens & API keys (partly), OAuth provider & MCP auth, Bot & fraud protection (partly), User import & export, Native mobile SDKs, Compliance & data residency.
Also has: Directory sync (SCIM).
Alternatives to Auth0 at 10,000 monthly active users, best match first
- Clerk: free Bills monthly retained users (MRU) (Hobby (free)). It covers 91% of Auth0; missing or partial: Custom auth flows (partly), Roles & permissions (partly), Compliance & data residency (partly). Free plan: Hobby: free, 50,000 MRU per app, up to 3 social connections, organizations up to 20 members, no enterprise SSO. Last price hike: Feb 2026.
- Amazon Cognito: free No native orgs; SSO via user-pool federation (Lite (free tier)). It covers 71% of Auth0; missing or partial: Social login (partly), Custom auth flows (partly), Enterprise SSO (partly), Magic links & one-time codes (partly), Multi-factor authentication (partly). Free plan: 10,000 direct-sign-in MAUs/month on Lite and Essentials (does not expire); 50 federated MAUs free. Last price hike: Nov 2024.
Prices at every size
- Auth0: 10,000 monthly active users free, 100,000 monthly active users custom pricing, a B2B app with 3 SSO customers $300/mo (Annual billing = 11x monthly)
- Clerk: 10,000 monthly active users free, 100,000 monthly active users $1,025/mo, a B2B app with 3 SSO customers $275/mo (Bills monthly retained users (MRU))
- Amazon Cognito: 10,000 monthly active users free, 100,000 monthly active users $495/mo, a B2B app with 3 SSO customers $3.75/mo (No native orgs; SSO via user-pool federation)
Prices are USD per month on monthly billing (annual-only plans divided by 12) for the vendor's hosted service: the headline is a production app with 10,000 monthly active users signing in with email/password and Google, and we also price 100,000 MAU and a B2B app with 1,000 MAU and 3 enterprise SSO customers. Free plans count when they allow production use at that volume.
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Everything about Auth0's own prices and price hikes: Auth0.