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Casdoor

Open-source identity and SSO server with a web UI and support for over 100 identity providers.

Open sourceSelf-hostableAuthentication providers
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About Casdoor

Casdoor is an open-source identity and access management platform with a web admin UI, written in Go with a React front end. It acts as an OAuth 2.0, OIDC, SAML, CAS and LDAP server, supports WebAuthn, TOTP and other MFA, and connects to a long list of social and enterprise identity providers, including many Chinese platforms that Western services often lack. Organisations, applications, roles and permissions are managed in the UI, and syncers can import users from databases, Active Directory, Google Workspace, Okta and others. Recent releases emphasise authentication for AI agents and an MCP server. It is Apache 2.0 licensed and free to self-host, and a hosted Casdoor Cloud offers a dedicated instance for a flat monthly fee with no per-user charges. It is lighter to run than Keycloak, but documentation quality varies and the large surface area means some features are less polished.

Best for: Teams that want a light self-hosted SSO server with many social and regional providers.

Pros and cons

What works

  • Supports OAuth, OIDC, SAML, CAS and LDAP
  • Very wide range of identity providers, including Chinese platforms
  • Flat-fee hosted option with no per-user charges

Why people leave

  • Documentation is uneven
  • Admin UI exposes many settings that can overwhelm
  • Smaller Western community than Keycloak

Top Casdoor alternatives

See all 4
  1. 1Keycloak logo
    Keycloak

    More mature open-source server with a large enterprise user base.

    66.5
  2. 2Zitadel logo
    Zitadel

    Open-source, multi-tenant identity with a more polished cloud service.

    62.6
  3. 3authentik logo
    authentik

    Self-hosted identity provider with a strong community and proxy features.

    59.6
  4. 4Logto logo
    Logto

    Developer-friendly open-source auth with a cleaner admin experience.

    57.2

Why people left Casdoor

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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Reviews

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Casdoor: common questions

Is Casdoor free?

Yes. Casdoor is free, open-source software that you can host yourself.

Is Casdoor open source?

Yes. The source code is on GitHub at casdoor/casdoor. You can also run it on your own server.

What platforms does Casdoor run on?

Casdoor is available for Web and Self-hosted.

What are the best alternatives to Casdoor?

The highest-ranked Casdoor alternatives right now are Keycloak, Zitadel and authentik. See the full ranked list for pricing, platforms and verified facts.

See all 4 Casdoor alternatives