Best User Management And Authentication Products in 2025

Auth0 is a program for people to get authentication and authorization services for their own business use.

Open Source

Enterprise-grade identity management for all your apps, users & devices

Verify your customers in under 15 seconds anywhere in the world with a cutting-edge SaaS & API platform for Identity Verification and AML/KYC compliance.

Try for free freemium $0.1 (per credit)

Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. It scales to millions of users and supports sign-in with social identity providers and enterprise identity providers via SAML 2.0.

The authentication platform that helps you secure your apps with branded login pages and your choice of identity methods. Stop worrying about auth and start building with MonoCloud.

Open Source User Authentication - An Alternative to Auth0 / Firebase Auth / AWS Cognito

Open Source freemium

On-demand SSO, directory integration, user provisioning and more

Application and Data, Application Utilities, and User Management and Authentication

Open Source

Flexible authentication solution for Rails with Warden.

The Spring portfolio has many projects, including Spring Framework, Spring IO Platform, Spring Cloud, Spring Boot, Spring Data, Spring Security...

Open Source

FusionAuth is a CIAM platform that is 100% free for unlimited users.

Open Source freemium

Loginradius is a cloud-based customer identity and access management platform. LoginRadius empowers businesses to deliver a delightful customer experience without compromising security.

Elegant user management, tailor-made for B2B SaaS

Open Source freemium

Application and Data, Application Utilities, and User Management and Authentication