Free Auth0 alternatives
Auth0's free plan covers authentication with passwordless, social logins and passkeys for up to 25,000 monthly active users, but logs are kept 1 day, MFA beyond the basics and role management are paid, and a custom domain needs card verification. The free plans below trade those limits differently. Every figure comes from the vendor's own pricing page as listed on this site.
7 listings · facts checked on official pages, latest 2026-10-29. Plans change; confirm on the vendor's site.
| Plan | Free users | The catch |
|---|---|---|
| Auth0 Free | 25,000 monthly active users | Logs kept 1 day; MFA beyond basics and roles are paid |
| WorkOS AuthKit | Up to 1 million users | Enterprise SSO and Directory Sync are $125 a month per connection |
| Clerk | 50,000 MRU per app | Up to 3 dashboard seats |
| Kinde | 10,500 monthly active users | Only 2 custom roles, 10 feature flags and 1 webhook |
| Stytch | 10,000 monthly active users and AI agents | Pay as you go past the allowance; removing branding is a $99 add-on |
| Frontegg | 7,500 monthly active users | Billed pay as you go past 7,500 users or 5 enterprise connections |
| Descope | 7,500 monthly active users and 10 tenants | Hard limits; custom domain starts on Pro ($249 a month, billed annually) |
| Firebase | Not stated | Some services and higher usage need the Blaze pay-as-you-go plan |
01WorkOS AuthKitDev Tools
From the official page · checked Oct 26, 2026
Pick this if: You want the biggest free user allowance, with social login, MFA and RBAC included.
02ClerkDev Tools
From the official page · checked Oct 29, 2026
Pick this if: You build several apps and want 50,000 MRU on each, with no card needed.
03KindeDev Tools
From the official page · checked Oct 26, 2026
Pick this if: You want MFA, B2B organizations and your own custom domain on the free plan.
04StytchDev Tools
From the official page · checked Oct 26, 2026
Pick this if: You need SSO or SCIM connections and machine-to-machine tokens, including for AI agents.
05FronteggDev Tools
From the official page · checked Oct 26, 2026
Pick this if: You sell to businesses and want hosted login with 5 SSO/SCIM connections and a custom domain.
06DescopeDev Tools
From the official page · checked Oct 26, 2026
Pick this if: You want every auth method plus 3 SSO connections and no watermark, and prefer hard limits to surprise bills.
07FirebaseDatabase
From the official page · checked Oct 29, 2026
Pick this if: You already use Firebase and want Auth alongside Firestore and Hosting on the no-cost Spark plan.
Questions
Is Auth0 free?
Yes. This site's Auth0 listing records a free plan for up to 25,000 monthly active users, and the pricing page says no card is required (checked 2026-10-22).
Which free Auth0 alternative allows the most users?
WorkOS AuthKit lists free user management for up to 1 million users. Clerk lists 50,000 MRU per app.
Which free auth plans include a custom domain?
Kinde and Frontegg list a custom domain on their free plans. Descope's starts on Pro, and Auth0's needs card verification.
Do I need a credit card?
Auth0, Clerk, Kinde and Firebase say no card is needed. WorkOS, Stytch, Frontegg and Descope do not say either way.