Authentication is the process of determining whether someone or something is, in fact, who or what it says it is. Authentication technology provides access control for systems by checking to see if a user’s credentials match the credentials in a database of authorized users or in a data authentication server.

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pocketbase / pocketbase

Open Source realtime backend in 1 file

golang authentication backend realtime

Updated Mar 16, 2026
Go

nextauthjs / next-auth

Authentication for the Web.

react nodejs oauth jwt oauth2 web authentication nextjs nuxt auth csrf oidc solidjs nuxt-auth nextauth sveltekit remix-auth solid-auth

Updated Feb 7, 2026
TypeScript

authelia / authelia

The Single Sign-On Multi-Factor portal for web apps, now OpenID Certified™

Updated Mar 17, 2026
Go

better-auth / better-auth

Sponsor

The most comprehensive authentication framework for TypeScript

oauth oauth2 typescript authentication stripe iam sso oidc

Updated Mar 17, 2026
TypeScript

heartcombo / devise

Flexible authentication solution for Rails with Warden.

ruby rails authentication devise

Updated Mar 16, 2026
Ruby

goauthentik / authentik

The authentication glue you need.

kubernetes security saml oauth2 authentication proxy reverse-proxy authorization sso oauth2-server oidc oauth2-client oidc-provider oidc-client saml-idp saml-sp authentik

Updated Mar 17, 2026
Python

apache / casbin

Apache Casbin: an authorization library that supports access control models like ACL, RBAC, ABAC.

oauth saml authentication iam apache acl auth authorization cas permission rbac sso oidc access-control abac authz authn casbin

Updated Mar 12, 2026
Go

mikeroyal / Self-Hosting-Guide

Self-Hosting Guide. Learn all about locally hosting (on premises & private web servers) and managing software applications by yourself or your organization. Including Cloud, LLMs, WireGuard, Automation, Home Assistant, and Networking.

Updated Jun 27, 2025
Dockerfile

supertokens / supertokens-core

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

java oauth keycloak authentication login password auth0 session-management signin aws-cognito social-login firebase-auth passwordless hacktoberfest passwordless-login passwordless-authentication supertokens email-password email-password-login

Updated Mar 16, 2026
Java

wasp-lang / open-saas

Sponsor

A 100% free modern JS SaaS boilerplate (React, NodeJS, Prisma). Full-featured: Auth (email, google, github, slack, MS), Email sending, Background jobs, Landing page, Payments (Stripe, Polar.sh), Shadcn UI, S3 file upload. AI-ready with tailored AGENTS.md, skills, and Claude Code plugin. One cmd deploy. Powered by Wasp full-stack framework.

Updated Mar 16, 2026
TypeScript

zitadel / zitadel

Sponsor

ZITADEL - Identity infrastructure, simplified for you.

identity saml oauth2 authentication login authorization sso user openid-connect oidc mfa scim multitenancy 2fa fido2 passkeys

Updated Mar 17, 2026
Go

casdoor / casdoor

Sponsor

An open-source AI-first Identity and Access Management (IAM) /AI MCP gateway and auth server with web UI supporting MCP, A2A, OAuth 2.1, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, Face ID, Google Workspace, Azure AD

Updated Mar 15, 2026
Go

logto-io / logto

Sponsor

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Updated Mar 17, 2026
TypeScript

tadata-org / fastapi_mcp

Sponsor

Expose your FastAPI endpoints as Model Context Protocol (MCP) tools, with Auth!

ai authentication mcp openapi authorization cursor claude windsurf fastapi llm mcp-servers mcp-server modelcontextprotocol

Updated Nov 24, 2025
Python

tymondesigns / jwt-auth

🔐 JSON Web Token Authentication for Laravel & Lumen

php jwt laravel authentication

Updated Mar 6, 2026
PHP

apereo / cas

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

Updated Mar 17, 2026
Java

pennersr / django-allauth

Sponsor

Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication. 🔁 Mirror of https://codeberg.org/allauth/django-allauth/

python saml django oauth2 signup authentication login accounts registration openid-connect social-login two-factor-authentication webauthn passkeys

Updated Mar 9, 2026
Python

nhost / nhost

The Open Source Firebase Alternative with GraphQL.

react javascript graphql postgres firebase typescript database vue authentication serverless backend storage nextjs serverless-functions flutter backend-as-a-service hasura graphql-api nhost

Updated Mar 16, 2026
TypeScript

teamhanko / hanko

Modern authentication, on your terms. Open source alternative to Auth0, Clerk, WorkOS, Stytch.

oauth jwt saml authentication iam user-management sso mfa passwordless 2fa ciam webauthn fido2 passkeys

Updated Mar 17, 2026
Go

git-ecosystem / git-credential-manager

Secure, cross-platform Git credential storage with authentication to GitHub, Azure Repos, and other popular Git hosting services.

github git gitlab authentication cross-platform bitbucket aad credential azure-devops azure-repos

Updated Mar 16, 2026
C#