Casdoor

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An open-source, UI-first identity and access management and single sign-on platform.

Identity & Access

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TL;DR - Casdoor

Open-source IAM/SSO platform with a modern web UI.
Supports a wide range of authentication protocols and identity providers.
Includes SaaS management features for subscriptions and payments.

Pricing: Free forever

Best for: Individuals & startups

Pros & Cons

Pros

Comprehensive support for various authentication standards and identity providers
Includes SaaS management capabilities for subscription businesses
Open-source and UI-first for ease of use and customization
Scalable and performant for high-concurrency environments
Well-documented integration process

Cons

Requires technical expertise for deployment and advanced configuration
Reliance on community for additional provider requests

Key Features

Enterprise-grade authentication and authorizationSingle Sign-On (SSO)Support for over 100 identity providers (OAuth 2.0, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, RADIUS, Google Workspace, Active Directory, Kerberos)SaaS subscription and payment management (products, plans, pricing, transactions)User management (registration, password recovery)Extensible architecture with custom authentication pluginsSDK for easy integrationModern frontend-backend separation architecture

Pricing

Free

Casdoor is completely free to use with no hidden costs.

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What is Casdoor?

Editorial review

Casdoor is an open-source, UI-first Identity and Access Management (IAM) and Single Sign-On (SSO) platform designed for enterprise-grade authentication. It provides a comprehensive solution for managing user identities, authentication, and authorization, supporting a wide array of industry standards and protocols including OAuth 2.0, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, TOTP, MFA, RADIUS, Google Workspace, Active Directory, and Kerberos. The platform is built with a modern frontend-backend separation architecture, offering an intuitive web UI with high performance and scalability. Beyond core IAM functionalities, Casdoor also integrates a SaaS management platform. This allows businesses to manage subscriptions, payment plans, pricing tiers, and transactions seamlessly. It supports direct user registration, secure password recovery, and offers an SDK for straightforward integration into existing applications. Casdoor is suitable for organizations of all sizes, from startups to Fortune 500 companies, looking for a robust and flexible identity solution.

LCLouis CorneloupUpdated Feb 23, 2026 · how we evaluateSourcecasdoor.org ↗

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Casdoor FAQ

What is Casdoor?

Casdoor is an open-source, UI-first Identity and Access Management (IAM) and Single Sign-On (SSO) platform that provides enterprise-grade authentication, authorization, and user management. It supports numerous identity providers and includes SaaS management features.

How much does Casdoor cost?

Casdoor is an open-source project, implying it is free to use. There is no mention of paid tiers or subscriptions for the core platform.

Is Casdoor free?

Yes, Casdoor is an open-source platform, making it free to use.

Who is Casdoor for?

Casdoor is for organizations of all sizes, from startups to Fortune 500 companies, that need a robust, scalable, and flexible solution for identity and access management, single sign-on, and potentially SaaS subscription management.

Source: casdoor.org