Open Source Alternatives to Clerk
An identity and access management platform that provides user authentication, multi-factor login, and developer APIs for building secure sign-in experiences across web and mobile applications.
Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Clerk give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 3 open source alternatives to Clerk. The most popular are Hanko, Authgear and Tesseral. Most use the AGPL-3.0 or Apache-2.0 license, and 3 offer an official Docker image.
Hanko
Provides authentication and user management with support for passkeys, multi factor authentication, and social login integrations.
Authgear
Manage user authentication, single sign-on, and identity access through a self-hosted or managed identity provider.
Tesseral
Provides multi-tenant authentication and identity management for B2B software with support for SSO and RBAC.
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