Best 20+ Authentication & Identity Management to use in 2025

Authentik is a tool that manages how users sign in to your applications and services. Think of it as a central security checkpoint that verifies who someone is before letting them access your systems.

Casdoor is a complete identity management solution that handles user authentication and authorization for your applications. It supports OAuth 2.0, OpenID Connect, SAML, CAS, and LDAP protocols, making it compatible with almost any application or service.

Tesseral is a complete authentication system designed for business-to-business software applications. It handles user login, permission management, and security features so developers can focus on building their main product.

Ory is a complete identity management system that handles user authentication and access control for web and mobile applications. It combines several specialized tools that work together to protect your application and manage who can access what.

FusionAuth is a complete authentication system that manages who can access your application and what they can do. You can install it on your own computer, your company servers, or use their cloud service. This flexibility makes it different from most authentication tools that force you to use only their cloud.

LoginRadius is a tool that handles user identity and login management for your digital products. When someone visits your website or app, LoginRadius manages their registration, login, and account security. It offers multiple ways for users to sign in, including traditional passwords, social media accounts like Google or Facebook, or passwordless options like magic links.

Authorizer is a tool that adds login and user management to your website or app. You connect it to your existing database, and it creates a complete system for users to sign up, log in, and manage their accounts. Unlike paid services, you own all the code and data.

Frontegg is a ready-to-use system that handles everything related to user accounts and access in your software. When you add it to your product, users get a professional login page, account settings, and security features automatically. It works like adding a pre-built module to your application.

Stytch is an authentication service that helps developers add login and security features to their websites and mobile apps. Instead of building authentication from scratch, developers can use Stytch's ready-made tools and code libraries to quickly set up secure user login.

Amazon Cognito is a cloud service that manages user authentication and authorization for applications. It has two main parts: user pools and identity pools. User pools store user profiles and handle login, while identity pools give users access to AWS resources.