What is the most popular open-source alternative to Okta?

Keycloak has the most GitHub stars in this list, with 37k (Apache-2.0). Other reviewed options include Authelia, Authentik, and ZITADEL.

Is there a self-hosted alternative to Okta?

Yes. Keycloak, Authelia, Authentik, and ZITADEL can run on your own server. Check each license before commercial use.

Which Okta alternatives have a hosted version?

None of the listed alternatives records a hosted option, so plan to run it yourself.

What should you check before switching from Okta?

Compare SSO protocols, MFA options, directory and provisioning. Confirm the license, who will operate the install, and how you will export your data from Okta.

Open-source Okta alternatives

A hosted identity platform for single sign-on, user directories, and MFA. Use the approved catalog below to weigh license, hosting, and repository activity for single sign-on and workforce identity.

Compare the set

In short

The catalog lists 4 reviewed open-source alternatives to Okta for single sign-on and workforce identity: Keycloak (Apache-2.0, self-hosted), Authelia (Apache-2.0, self-hosted), Authentik (Custom, self-hosted), and ZITADEL (AGPL-3.0, self-hosted). GitHub metadata last checked October 4, 2026.

About Okta

A hosted identity platform for single sign-on, user directories, and MFA.

SSO protocols
MFA options
Directory and provisioning

Why choose each alternative

Keycloak
Single sign-on and user federation with SAML and OpenID Connect.
Apache-2.0 · Self-hosted · Authentication
Authelia
Single sign-on and multifactor authentication in front of self-hosted apps.
Apache-2.0 · Self-hosted · Authentication
Authentik
An identity provider with editable login flows and SSO.
Custom · Self-hosted · Authentication
ZITADEL
SSO, passkeys, and multitenant identity management.
AGPL-3.0 · Self-hosted · Authentication

Keycloak

Single sign-on and user federation for applications.

Stars: 37,135
Updated: today
License: Apache-2.0
Hosting: Self-hosted
Category: Authentication

Often instead of Auth0

Website

Authelia

Authelia adds single sign-on and multifactor authentication to self-hosted apps.

Stars: 29,172
Updated: 1d ago
License: Apache-2.0
Hosting: Self-hosted
Category: Authentication

Often instead of Okta

Website

Authentik

An identity provider with flows you can edit.

Stars: 25,838
Updated: 1d ago
License: Custom
Hosting: Self-hosted
Category: Authentication

Often instead of Auth0

Website

ZITADEL

ZITADEL provides identity management, SSO, passkeys, and multitenant login.

Stars: 15,194
Updated: today
License: AGPL-3.0
Hosting: Self-hosted
Category: Authentication

Often instead of Auth0

Website

Related categories

Authentication

Compare alternatives

Okta alternatives: questions

What is the most popular open-source alternative to Okta?: Keycloak has the most GitHub stars in this list, with 37k (Apache-2.0). Other reviewed options include Authelia, Authentik, and ZITADEL.
Is there a self-hosted alternative to Okta?: Yes. Keycloak, Authelia, Authentik, and ZITADEL can run on your own server. Check each license before commercial use.
Which Okta alternatives have a hosted version?: None of the listed alternatives records a hosted option, so plan to run it yourself.
What should you check before switching from Okta?: Compare SSO protocols, MFA options, directory and provisioning. Confirm the license, who will operate the install, and how you will export your data from Okta.

Repository activity is a signal, not a security or quality guarantee.