Authgear
Login, SSO, MFA and passkeys as an open-source identity service.
Similar open source projects
All Auth0 alternatives-
Keycloak
Single sign-on and identity management for apps and services.
Alternative to Okta, Auth0
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Authelia
A login portal with single sign-on and two-factor auth for your self-hosted apps.
Alternative to Okta
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authentik
An identity provider with single sign-on, MFA and flexible login flows.
Alternative to Okta
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Zitadel
Identity management with login, SSO and multi-tenancy, built for developers.
Alternative to Auth0
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Supabase
A Postgres backend with authentication, file storage, realtime and an instant API.
Alternative to Firebase
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Meilisearch
A fast search engine with typo tolerance, easy to add to an app.
Alternative to Algolia
About 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.