Best Open Source login Libraries

A curated list of the most popular GitHub repositories tagged with login. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1supertokens/supertokens-core

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

14,925Java

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#2ory/kratos

Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.

13,455Go

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#3zitadel/zitadel

ZITADEL - Identity infrastructure, simplified for you.

13,047Go

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#4stack-auth/stack-auth

Open-source Auth0/Clerk alternative

6,706TypeScript

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