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# GitLab authentication and authorization

GitLab integrates with the following external authentication and authorization
providers:

- [Atlassian](atlassian.md)
- [Auth0](../../integration/auth0.md)
- [Authentiq](authentiq.md)
- [AWS Cognito](cognito.md)
- [Azure](../../integration/azure.md)
- [Bitbucket Cloud](../../integration/bitbucket.md)
- [CAS](../../integration/cas.md)
- [Crowd](crowd.md)
- [Facebook](../../integration/facebook.md)
- [GitHub](../../integration/github.md)
- [GitLab.com](../../integration/gitlab.md)
- [Google](../../integration/google.md)
- [JWT](jwt.md)
- [Kerberos](../../integration/kerberos.md)
- [LDAP](ldap/index.md): Includes Active Directory, Apple Open Directory, Open LDAP,
  and 389 Server.
  - [Google Secure LDAP](ldap/google_secure_ldap.md)
- [Okta](okta.md)
- [Salesforce](../../integration/salesforce.md)
- [SAML](../../integration/saml.md)
- [SAML for GitLab.com groups](../../user/group/saml_sso/index.md) **(SILVER ONLY)**
- [Shibboleth](../../integration/shibboleth.md)
- [Smartcard](smartcard.md) **(PREMIUM ONLY)**
- [Twitter](../../integration/twitter.md)

NOTE: **Note:**
UltraAuth has removed their software which supports OmniAuth integration. We have therefore removed all references to UltraAuth integration.
