Open source alternatives to Okta
4 free tools that do the job of Okta, most stars first. All are web apps you can run on your own server.
4 alternatives
Sorted by most stars.-
Keycloak
Single sign-on and identity management for apps and services.
Also an alternative to Auth0
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Authelia
A login portal with single sign-on and two-factor auth for your self-hosted apps.
Web app
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authentik
An identity provider with single sign-on, MFA and flexible login flows.
Web app
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Authgear
Login, SSO, MFA and passkeys as an open-source identity service.
Also an alternative to Auth0
More alternatives in Backend and auth
All Backend and auth tools
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Ask us to add itAbout these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.