Compare 30 free auth tools, free tiers, and developer deals. Verified pricing for Clerk, Auth0, Kinde, WorkOS, Permit.io and more.
What this name holds: Identity providers an application delegates sign-in to — hosted and self-hosted.
3 other names here answer “who is allowed in, and where are the secrets kept”, and each holds a different list: Password Managers (7), Secrets Management (4), Security (53).
We track 30 auth services with free tiers. Clerk leads with a generous free tier. This category has seen some movement — 9 pricing changes recorded across vendors.
| Vendor | Tier | Description | Verified |
|---|---|---|---|
| Clerk | Hobby | Drop-in auth with 50K monthly retained users free, unlimited apps | 2026-08-20 |
| Auth0 | Free | Identity platform — 25K MAU (B2C), unlimited logins, social + database connections, Universal Login, 1 Enterprise Connection, 5 Organizations, 1 Custom Domain. No credit card required | 2026-08-15 |
| Kinde | Free | 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 | 2026-09-03 |
| WorkOS | Free | Superseded: As of 2026-09-05, workos.com/pricing reads: User Management is free for up to 1 million users. Single Sign-On starts at $125/connection. Directory Sync starts at $125/connection. Audit Logs are free with paid options for log streaming and event retention. Radar is free for the first 1,000 checks. We are not publishing our stored WorkOS terms beside it — our own pricing change record, discovered 2026-09-05, names them as the previous ones. Read what we recorded ↓ | 2026-08-22 |
| Permit.io | Free | Superseded: As of 2026-08-28, permit.io/pricing reads: Community: Free Forever, 1000 MAU, 20 Tenants, No Limit Authorization Queries, 25 Roles, 50 Resource Types, 5 Role Assignments, 2,000 Groups, 2,000 Resource Instances, 2,000 Relationship Tuples. Free for OSS Projects - Contact Us. We are not publishing our stored Permit.io terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ | 2026-07-07 |
| Stytch | Free | 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 | 2026-08-27 |
| Descope | Free Forever | Authentication and user management. Free Forever plan: 7,500 MAU, 10 tenants, 3 SSO connections. All core auth methods: passwords, magic links, OTP, passkeys, social login, MFA | 2026-09-05 |
| Hanko | Free | Passkey-first authentication. Cloud free tier: 10,000 MAU, 2 production projects. Also open source (AGPL v3) for unlimited self-hosted use. WebAuthn, OAuth, email/password | 2026-08-23 |
| 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 | 2026-08-22 |
| FusionAuth | Community | 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 ↓ | 2026-08-11 |
| SuperTokens | Free | Superseded: As of 2026-09-05, supertokens.com/pricing reads: Self hosting the open source features is free without any limits! Cloud is free under 5K MAUs. Multi-factor Authentication is $0.01 / MAU (Minimum $100 / month). Account Linking is $0.005 / MAU (Minimum $100 / month). We are not publishing our stored SuperTokens terms beside it — our own pricing change record, discovered 2026-09-05, names them as the previous ones. Read what we recorded ↓ | 2026-08-23 |
| 360username | Free | A free tool to search a username across 150+ social platforms to find matching profiles. | 2026-07-11 |
| Aserto | Free | Fine-grained authorization as a service for applications and APIs. Free up to 1000 MAUs and 100 authorizer instances. | 2026-07-12 |
| asgardeo.io | Free | Seamless Integration of SSO, MFA, passwordless auth and more. Includes SDKs for frontend and backend apps. Free tier: 7,500 Consumer MAUs (B2C), 250 B2B MAUs, 2 social login providers. | 2026-07-11 |
| Authgear | Free | Bring Passwordless, OTPs, 2FA, SSO to your apps in minutes. All Front-end included. Free tier: unlimited MAUs, up to 2 applications, 100 SMS/month. | 2026-07-13 |
| Authress | Free | Authentication login and access control, unlimited identity providers for any project. Facebook, Google, Twitter and more. The first 1000 API calls are free. | 2026-07-11 |
| Authy | Free | Two-factor authentication (2FA) on multiple devices, with backups. Drop-in replacement for Google Authenticator. Free for up to 100 successful authentications. | 2026-07-07 |
| Cerbos Hub | Free | A complete authorization management system for authoring, testing, and deploying access policies. Fine-grained authorization and access control, free up to 100 monthly active principals. | 2026-07-13 |
| Cloud-IAM | Free | Keycloak Identity and Access Management as a Service. Free up to 100 users and one realm. | 2026-07-07 |
| duo.com | Free | Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens. | 2026-07-11 |
| logintc.com | Free | Two-factor authentication (2FA) by push notifications, free for 3 users, VPN, Websites, and SSH | 2026-07-11 |
| Logto | Free | 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 ↓ | 2026-08-16 |
| MojoAuth | Free | MojoAuth makes it easy to implement Passwordless authentication on your web, mobile, or any application in minutes. | 2026-08-26 |
| Okta | Free | Developer authentication via Auth0 platform — 25,000 MAU free, social login, passwordless, MFA, SSO. Note: developer.okta.com/signup now routes to Auth0. | 2026-07-10 |
| Ory | Free | Open-source identity infrastructure — Kratos (identity), Hydra (OAuth2/OIDC), Oathkeeper (API gateway), Keto (permissions). Cloud: 25K MAU free. Self-hosted: unlimited, Apache 2.0 | 2026-08-13 |
| Phase Two | Free | Keycloak Open Source Identity and Access Management. Free Starter realm up to 100 users. SSO connections require paid Premium tier ($749/month). Leveraging Phase Two's enhanced Keycloak container with Organization extension. | 2026-07-09 |
| PropelAuth | Free | Authentication for B2B SaaS — free up to 10,000 MAUs and 10K Transactional Emails (with a watermark branding: "Powered by PropelAuth"). | 2026-07-11 |
| Stack Auth | Free | Now Hexclave — stack-auth.com redirects to hexclave.com, and the GitHub org stack-auth/stack-auth redirects to hexclave/hexclave (same repository). Open-source user infrastructure: auth, teams, RBAC, API keys, emails. Free tier is $0 forever: up to 10,000 auth users, 1 dashboard admin, 1,000 emails per month, email/OAuth/magic links, community support. Also self-hostable for free. | 2026-07-09 |
| ZITADEL Cloud | Free | A turnkey user and access management that works for you and supports multi-tenant (B2B) use cases. Free for up to 100 Daily Active Users, with all security features (no paywall for OTP, Passwordless, Policies, and so on). | 2026-07-13 |
| authentik | Free OSS | Self-hosted identity provider covering SSO, SAML, OAuth2/OIDC and LDAP. The open-source edition is free and aimed at homelab users and simple use cases. Enterprise is $5/user/month billed annually with external users at $0.02/user/month and no charge for service accounts; Enterprise Plus starts at $20k annually. | 2026-08-27 |
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