Open Source Authentication Apps
Secure your apps with robust Authentication solutions! Explore password managers, MFA, SSO & more. Protect user data and simplify login processes.
Apps in Authentication
Medplum
Authentication · Databases · Developer Tools
An open-source, FHIR-native healthcare platform that gives developers a compliant backend, authentication, a React component library, and serverless bots to build clinical applications in weeks instead of years.
nango
Authentication · Automation · Developer Tools
Build product integrations with AI using 800+ APIs — auth, proxy, and TypeScript functions on production-grade infrastructure.
authentik
Authentication · Security
The self-hosted Identity Provider that replaces Okta, Auth0, and Entra ID with a unified SSO platform supporting SAML, OAuth2/OIDC, LDAP, RADIUS, and WebAuthn.
Logto
Authentication
Open-source auth infrastructure for SaaS and AI apps with OIDC, SAML, and RBAC
Supabase
Authentication · Databases · Developer Tools
The open-source Postgres development platform that replaces Firebase with authentication, real-time APIs, edge functions, storage, and vector embeddings — all built on PostgreSQL.
Hexclave
Authentication · Developer Tools
The open-source user infrastructure platform — authentication, teams, payments, emails, analytics, and more on a single unified user model.
VoidAuth
Authentication · Security
Self-hosted SSO with OIDC, LDAP, passkeys, and proxy auth for your entire self-hosted stack
Bramble
Authentication · Password Manager · Security
Local-first, end-to-end encrypted password manager that syncs your vault directly between your own devices over a private peer-to-peer mesh — no server, no account, no cloud in the middle.
About Authentication
Authentication is the cornerstone of modern application security. It’s the process of confirming that a user is who they say they are before granting access to resources. Without robust authentication, applications are vulnerable to unauthorized access, data breaches, and a host of other security risks. This category encompasses a wide range of solutions designed to manage user identities, enforce access controls, and protect sensitive information. Crucially, it’s often paired with authorization (determining what a user can access) for complete security.
Types of apps within the Authentication category include password managers, multi-factor authentication (MFA) providers, social login services (allowing users to sign in with Google or Facebook accounts), passwordless authentication solutions (using biometrics, magic links, or WebAuthn), and comprehensive Identity Access Management (IAM) platforms. Single Sign-On (SSO) solutions also fall under this umbrella, streamlining user access across multiple applications.
Authentication matters because it directly impacts the security and usability of your applications. Common use cases include protecting user accounts in web and mobile apps, securing API access, verifying employee identities for internal systems (enterprise authentication), and complying with data privacy regulations (like GDPR or HIPAA). Implementing strong authentication protocols reduces the risk of account takeovers, data breaches, and fraud. Beyond security, a seamless authentication experience improves user satisfaction – nobody wants to remember dozens of complex passwords! Modern authentication solutions prioritize usability through features like MFA, passwordless login, and SSO.
