Best 8 Tools for Securing API Access in 2025

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.

Auth.js is a complete authentication solution that works across different JavaScript frameworks. It provides everything needed to add secure login systems to websites and applications. You can let users sign in through their existing accounts on services like Google or GitHub, or you can use email-based magic links, or even traditional username and password combinations.

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.

SuperTokens is an authentication framework that handles user login, registration, and session management for your applications. It provides ready-made solutions for email password login, social login through providers like Google and Facebook, passwordless authentication using magic links or one-time codes, and more.

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.

Pomerium is a zero trust access proxy that sits between users and internal applications. It verifies identity and permission before allowing access to any resource. The tool works by connecting to your existing identity provider like Google, Okta, Azure, or others.

Web3Auth is a tool that helps websites and apps add blockchain wallet features through familiar login methods. When you sign in with your Google account or email, Web3Auth creates a secure wallet for you in the background. You do not need to understand blockchain technology or manage complicated passwords.

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.