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ZITADEL is an open-source identity and access management platform for developers building customer-facing and workforce applications. It provides OAuth 2.0, OpenID Connect, SAML, passwordless authentication, organization management, and multi-tenant identity features.
💡 Pick it for the largest integration ecosystem and mature enterprise identity features.
Auth0 provides a comprehensive platform for authentication and authorization.
Free tier available. Paid plans start at $23/month.
💡 Pick it when you need a free, self-hosted IAM platform with deep enterprise federation support.
Keycloak is an open-source Identity and Access Management solution aimed at modern applications and services.
Free and open-source
💡 Pick it for the fastest polished authentication UX in React, Next.js, and modern SaaS apps.
Clerk is a modern authentication and user management platform for developers.
Starting at $0/month
💡 Pick it for a flexible self-hosted or managed alternative with strong tenant and protocol support.
FusionAuth is a complete identity and access management tool that provides authentication, authorization, and user management for any app.
Free for unlimited users, with paid support options
💡 Pick it when your application already runs on AWS and needs tightly integrated managed identity.
Amazon Cognito provides authentication, authorization, and user management for web and mobile apps.
Pricing based on monthly active users
💡 Pick it when enterprise SSO, SCIM, and directory synchronization matter more than consumer identity features.
WorkOS is a platform that helps developers to quickly build and scale their applications by providing authentication, directory sync, audit trail, and...
Custom pricing based on usage
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