Zitadel

BoxyHQ

🔥 Streamline your web application's authentication with Jackson, an SSO service supporting SAML and OpenID Connect protocols. Beyond enterprise-grade Single Sign-On, it also supports Directory Sync via the SCIM 2.0 protocol for automatic user and group provisioning/de-provisioning. 🤩

SuperTokens

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

Stack Auth

Open-source Auth0/Clerk alternative

Ory

Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.

Authentik

The authentication glue you need.

Cerbos

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware access control policies for your application resources.

Hanko

The Complete Authentication and User Management Solution for the Passkey Era. Open Source Alternative to Clerk, Auth0, et al.

Logto

🧑‍🚀 An identity and access management (IAM) infrastructure with authentication, authorization, MFA, SSO, user management, and multi-tenancy features. Supports OAuth 2.0, OIDC, and SAML. No framework restrictions.