Auth0 free tier too limited? Compare free authentication alternatives: Clerk, WorkOS, Supabase Auth, Firebase Auth, Logto, FusionAuth, Keycloak, and more. Verified 2026 free tier limits.

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Auth0 Alternatives

Auth0 is a powerful identity platform, but its pricing is one of the steepest cliffs in developer tools. The free tier gives you 25K MAU — generous for prototyping. But the moment you outgrow it, you're looking at the Essential plan starting at $240/month for just 500 external MAU. That's a jump from $0 to nearly $3,000/year with no middle ground.

The pricing pain is compounded by complexity. Auth0's tenant model, rule/action system, and connection limits create billing surprises. Teams regularly discover they need features (SSO, MFA customization, branding removal) that are locked behind higher tiers. "Auth0 alternatives" remains one of the most consistently searched developer queries.

The authentication landscape in 2026 offers real competition. Managed platforms (Clerk, WorkOS, Stytch) provide modern DX with generous free tiers. Open-source solutions (Keycloak, FusionAuth, Ory, Logto) give you unlimited users when self-hosted. And BaaS platforms (Supabase, Firebase) include auth as part of a broader free tier. The right choice depends on whether you prioritize DX, cost, or control.

Limits Increased

Auth0 increased free tier from 7,500 to 25,000 monthly active users. Largest free tier expansion since Okta acquisition. Makes Auth0 competitive with Clerk and Firebase Auth on free tier Source ↗

Before: Free tier: 7,500 MAU, unlimited social connections, 2 organizations
After: Free tier: 25,000 MAU (+233%), unlimited social connections, 5 organizations. Actions, Branding, MFA included

Top Alternatives

Supabase Free caution discovered 2026-09-03 restructured

Superseded: As of 2026-09-03, supabase.com/pricing reads: The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free projects are paused after 1 week of inactivity. Paid plans include $10/mo in compute credits. We are not publishing our stored Supabase terms beside it — our own pricing change record, discovered 2026-09-03, names them as the previous ones. Read what we recorded ↓

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Firebase Spark stable

Full BaaS — Auth (50K MAU), Firestore (1 GiB storage, 50K reads/day), Cloud Functions (2M invocations/month), Hosting, Analytics, Crashlytics all free

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Clerk Hobby stable

Drop-in auth with 50K monthly retained users free, unlimited apps

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Kinde Free stable

10,500 MAU, OAuth 2.0/OIDC/SAML, MFA (email/SMS/app), passwordless, multi-tenancy (5 organizations), feature flags (10 max). No credit card required

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WorkOS Free stable

AuthKit with up to 1M MAU free for user management — email/password, social login, MFA. Enterprise SSO/SCIM priced separately

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Stytch Free stable

Authentication and fraud prevention — 10,000 MAU, passwordless login, OAuth, MFA, session management, device fingerprinting, 5 SSO/SCIM connections, 1,000 M2M tokens, password breach detection

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Keycloak Free OSS

Free OSS (Apache 2.0). Red Hat-backed identity and access management. SSO, OIDC, SAML, LDAP, social login, MFA, fine-grained authorization. Self-hosted with no user limits

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FusionAuth Community caution discovered 2026-09-01 restructured

Superseded: As of 2026-09-01, fusionauth.io/pricing reads: Community: 1,000 MAUs Self-hosted: Free Download FusionAuth Community is free and unlimited. It has the core authentication features. Core authentication standards & features most apps need Community support (forums, Slack, Github) Self-host FusionAuth on your own infrastructure for free. We are not publishing our stored FusionAuth terms beside it — our own pricing change record, discovered 2026-09-01, names them as the previous ones. Read what we recorded ↓

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Logto Free caution discovered 2026-09-02 restructured

Superseded: As of 2026-09-02, logto.io/pricing reads: Free tier is $0/month for up to 50,000 MAU and 50K tokens. Includes user authentication, machine-to-machine apps, account APIs, audit logs, and user management. Additional features like RBAC, MFA, and Organizations are paid add-ons. We are not publishing our stored Logto terms beside it — our own pricing change record, discovered 2026-09-02, names them as the previous ones. Read what we recorded ↓

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Ory Free stable

Open-source identity infrastructure — Kratos (identity), Hydra (OAuth2/OIDC), Oathkeeper (API gateway), Keto (permissions). Cloud: 25K MAU free. Self-hosted: unlimited, Apache 2.0

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Free Tier Comparison

What you actually get for free on each platform. Auth0's 25K MAU free tier is competitive, but the jump to paid is the steepest in the industry.

Platform Free MAU SSO MFA Self-Hosted Best For
Auth0 25K Paid Yes No Enterprise identity + rules engine
Clerk 50K Paid Yes No Pre-built UI components + React DX
WorkOS 1M Paid Yes No Enterprise SSO + SCIM at scale
Supabase Auth 50K No Yes Yes (OSS) Full BaaS — auth + database + storage
Firebase Auth 50K No Yes No Google ecosystem + mobile SDKs
Logto 50K Paid Yes Yes (OSS) Modern OIDC + open-source option
Stytch 10K 5 connections Yes No Passwordless + fraud prevention
FusionAuth Unlimited* Yes Yes Yes (Apache 2.0) Full-featured self-hosted — zero cost
Keycloak Unlimited* Yes Yes Yes (Apache 2.0) Enterprise IAM — Red Hat backed
Ory 25K (cloud) Yes Yes Yes (Apache 2.0) Modular identity — Kratos + Hydra
Kinde 10.5K SAML Yes No Auth + feature flags + billing

*FusionAuth and Keycloak are free self-hosted with no user limits. WorkOS leads managed platforms at 1M MAU free (AuthKit). Clerk and Logto both offer 50K MAU. Supabase and Firebase bundle auth into broader BaaS free tiers.

Quick Comparison

Tool Free Tier Details Stability
Supabase Free As of 2026-09-03, supabase.com/pricing reads: The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB… Our stored Supabase terms are superseded and withheld. caution
discovered 2026-09-03 restructured
Firebase Spark Full BaaS — Auth (50K MAU), Firestore (1 GiB storage, 50K reads/day), Cloud Functions (2M invocations/month), Hosting, A... stable
Clerk Hobby Drop-in auth with 50K monthly retained users free, unlimited apps stable
Kinde Free 10,500 MAU, OAuth 2.0/OIDC/SAML, MFA (email/SMS/app), passwordless, multi-tenancy (5 organizations), feature flags (10 m... stable
WorkOS Free AuthKit with up to 1M MAU free for user management — email/password, social login, MFA. Enterprise SSO/SCIM priced separ... stable
Stytch Free Authentication and fraud prevention — 10,000 MAU, passwordless login, OAuth, MFA, session management, device fingerprint... stable
Keycloak Free OSS Free OSS (Apache 2.0). Red Hat-backed identity and access management. SSO, OIDC, SAML, LDAP, social login, MFA, fine-gra... —
FusionAuth Community As of 2026-09-01, fusionauth.io/pricing reads: Community: 1,000 MAUs Self-hosted: Free Download FusionAuth Community is free and… Our stored FusionAuth terms are superseded and withheld. caution
discovered 2026-09-01 restructured
Logto Free As of 2026-09-02, logto.io/pricing reads: Free tier is $0/month for up to 50,000 MAU and 50K tokens… Our stored Logto terms are superseded and withheld. caution
discovered 2026-09-02 restructured
Ory Free Open-source identity infrastructure — Kratos (identity), Hydra (OAuth2/OIDC), Oathkeeper (API gateway), Keto (permission... stable

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