Add authentication without per-user fees. Open source Clerk alternatives for sign-up flows, user profiles, and session management you control.
Clerk simplifies adding authentication and user management to applications, particularly those built with React, Next.js, and Remix. It offers pre-built UI components and backend infrastructure to handle user registration, login, profile management, and more. However, developers sometimes look for open source alternatives to avoid relying on a proprietary SaaS solution and maintain greater control over their user data and authentication processes.
Key features of Clerk include easily integrated UI components, streamlined user authentication flows, and robust account management. It supports features like multi-factor authentication (MFA), organization management, and customizable branding. While powerful and convenient, the closed-source nature of Clerk can be a drawback for teams prioritizing self-hosting or deep customization. This leads to exploring alternatives offering more flexibility.
Common use cases for Clerk include building user logins and registration in web apps, managing user profiles and permissions, implementing secure authentication workflows, and handling complex organization structures. However, many developers may prefer self-hosted solutions for compliance reasons or to avoid ongoing subscription costs. Finding a suitable open source alternative allows them to achieve similar functionality with greater control and transparency.
Authentication · Ecommerce · Security
Open-source Identity Provider for SSO, SAML, OIDC, and Zero Trust
Authentication · Security
Open-source Auth0 alternative with full data control and passwordless login
Authentication
Open-source, API-first identity platform with multi-tenancy, Passkeys & SSO
Authentication
Open-source auth infrastructure for SaaS and AI apps with OIDC, SAML, and RBAC
Authentication · Security
Open source alternative to Auth0, Clerk & WorkOS — passwordless, passkeys, SSO
Developer Tools · Authentication
Open-source Auth0/Clerk alternative with RBAC, teams, and passkeys
Authentication · Security
Self-hosted SSO with OIDC, passkeys, and proxy auth for your apps
Authentication
Open-source Auth0/Clerk/Firebase alternative with passkeys, SSO, and MFA