Open Source Authentication & SSO Providers using CSS
A curated collection of the best open source platforms providing authentication, Single Sign-On (SSO), and user management. using CSS.
Passkeys, SSO, and MFA without vendor lock-in
Stars
9,035Last commit
23 hours agoLicense
Unknown
Open source authentication platform supporting passkeys, 2FA, SSO, and social login. Self-host or use Hanko Cloud, with full control over your data and no lock-in.
Open Source Alternative to:
Secure authentication and access control made simple
Stars
37,063Last commit
5 hours agoLicense
Apache-2.0
Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.
Open Source Alternative to:
Framework-agnostic authentication for TypeScript applications
Stars
30,132Last commit
11 hours agoLicense
MIT
A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.
Open Source Alternative to:
Secure access management for modern IT infrastructure
Stars
31,692Last commit
11 hours agoLicense
GPL-3.0
Open-source privileged access management solution offering secure, browser-based access to SSH, RDP, Kubernetes, databases and remote applications.
Open Source Alternative to:
Take control of your identity with a secure, flexible solution
Stars
25,782Last commit
4 hours agoLicense
MIT
authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.
Open Source Alternative to:
Secure, customizable identity infrastructure for developers
Stars
15,134Last commit
5 hours agoLicense
AGPL-3.0
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.
Open Source Alternative to:
Secure, seamless authentication for modern applications
Stars
14,646Last commit
5 hours agoLicense
MPL-2.0
An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.
Open Source Alternative to:
Secure, customizable authentication for your applications
Stars
15,324Last commit
14 hours agoLicense
Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.
Open Source Alternative to:
Passwordless OIDC provider built for self-hosters
Stars
9,333Last commit
15 hours agoLicense
BSD-2-Clause
Self-hostable OpenID Connect and OAuth 2.0 provider that lets users sign in to any OIDC-compatible app using passkeys instead of passwords.
Open Source Alternative to:
Modular auth, payments, emails, and analytics for your product
Stars
6,861Last commit
11 hours agoLicense
Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Open Source Alternative to:
Managed identity and access management for any app
Stars
2,079Last commit
4 hours agoLicense
Apache-2.0
Authgear is a managed IAM platform handling authentication, SSO, and user management for B2C and B2B apps, with biometrics, MFA, and zero-trust support.
Open Source Alternative to:
Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.
Capture