AuthSo Modern You Can Download It!

Get a Demo! - Quick response & catered demos! - Check out the platform on your own!

Fully Integrated Authentication and Authorization

FusionAuth adds login, registration, SSO, MFA, and a bazillion other features to your app in days - not months.

Authentication & Authorization

Feature	Description
Registration & Login	Offer your users flexible authentication options, including passwords, passwordless, single sign-on (SSO), and multi-factor authentication (MFA). FusionAuth supports standards-based protocols like OAuth2, OIDC, and SAML v2 for secure and seamless login experiences.
Single Sign-On	Streamline access, reduce password fatigue, and simplify user management while maintaining robust authentication with single sign-on.
Passkeys	Enhance security by eliminating password hassles such as forgetting, creating strong passwords, or frequent resets.
Multi-Factor Authentication (MFA)	Improve account security by requiring additional verification, making it much harder for unauthorized users to gain access even if passwords are compromised. Safeguard sensitive data and reduce the risk of account takeovers.
API Authorization	Implement fine-grained access control, protect sensitive data, and make sure that only authenticated users with proper permissions can interact with your APIs. Scale securely while maintaining developer productivity.
Role-Based Access Control (RBAC)	Easily define and manage user roles, assign specific permissions, and ensure users can only access the features and data they need. Streamline security while enhancing user experience.
Session Management	Seamless user authentication across multiple devices. Control session lifetimes, and easily revoke access when needed.
Step Up Auth	Keep those sensitive actions secure without compromising user experience. Step Up Auth lets you require additional verification, but only when needed. Protect high-risk operations without annoying users doing routine tasks.
User Management UI	Give your admins and support team superpowers with FusionAuth’s intuitive user management interface. Quickly search, sort, and manage user accounts, leading to better support efficiency.
Custom User Data Management	Enhance user profiles and streamline data updates without writing any code. Keep your application flexible and user-centric with FusionAuth’s customizable admin forms.
Entity Management	Complex relationships? Fine-grained permissions? Seamless machine-to-machine interactions? FusionAuth’s Entity Management makes it easy to manage and scale large volumes of diverse Entities.
Self-Service Account Management	Empower users to securely manage their own accounts, including multi-factor authentication (MFA), updating personal information, and resetting passwords.
Advanced Threat Detection	Detect and respond to sophisticated threats in real-time with customizable rate limiting, CAPTCHA integration, and location-aware security. Enhance security and safeguard user data while getting alerted when it matters most.
Breached Password Detection	Protect your users and systems from compromised credentials. Compare passwords against a vast database of known leaks.
Security and Compliance	Ensure regulatory compliance and robust security with FusionAuth. Our SOC 2 Type 2 certification, regular security audits, and comprehensive data protection measures help you meet industry standards and safeguard your user data.
Data Isolation and Deployment Flexibility	Enhance security and simplify compliance with FusionAuth's single-tenant architecture. Your data remains isolated, giving you full control over deployment, customization, and data sovereignty. Scale effortlessly with strict data separation.

Simplifying Complex Identity Needs

Save months of development cycles by using FusionAuth for all your auth needs.

Built with a security-first mindset - giving you the freedom to accelerate your products and never worry about the next compliance or security requirement.

Scalable and reliable infrastructure that supports one user logging in -- or thousands at once.

API-first and fully customizable so your developers will love us.

B2B & B2C Use Cases

From securing patient data in healthcare to enhancing user experiences in gaming and streamlining retail operations, our versatile platform meets your unique challenges.

Healthcare	Gaming	Entertainment	Retail	Fintech

Start Building Your Application

Step-by-step guides to quickly integrate FusionAuth into your application.

start building

Quickstarts

Step-by-step guides to quickly integrate FusionAuth into your application.

Start Here

API Docs

Explore key topics related to working with APIs.

Any Language. Any Platform. Any Technology.

Integration with any tech stack in minutes using our APIs or SDKs.

Enterprise Benefits, Without The Enterprise Bullsh*t

1,000+ Logins/sec Supported

99.99% Uptime SLA

24/7 Engineer-led Support

Hosting

Deploy Anywhere, Our Cloud, Your Cloud or On-Premise

FusionAuth can be hosted anywhere providing flexibility for you to choose the deployment method that best suits your infrastructure requirements.

free download

Self-Hosted

Host it offline, from your cloud, on-prem, or from under your desk – wherever.

Learn More

FusionAuth Cloud

Global cloud locations for high performance, data sovereignty, and high availability with up to 99.99% SLA.

Start Free Trial

All Auth. No Bullsh*t

Trusted by 20+ Million Developers

With Fusion Auth, all plans, you can keep adding as many Identity Providers as you want at no extra cost - this was our main issue with other CIAM providers as they demand increasingly unreasonable fees

David Krizanic

Head of Architecture @ Com Laude

We were using Auth0 before FusionAuth and, although it had great features, it could be a bit confusing, mainly when talking about roles, scopes, permissions etc. At scale, Auth0’s pricing was outrageous.

Mike Warren

Developer at BRIX Templates

“The implementation is so much more intuitive than Auth0. I can run it on my own infrastructure and out of the box it supports everything I need. And more!”

Jason Musyj

Co-Founder & CTO of Unio

The FusionAuth team has been extremely helpful. They really give you the attention you need to solve any identity challenge.

Danny Davis

Wonder Giant

"FusionAuth is an amazing product. Tons of features and the support is the best in the industry."

Marc Pearson

IT Consultant

I achieved in a single day's work what took a week and a half with Gluu. FusionAuth is just that simple to use.

Mike Rees

Growth Partners

It's a huge win for us that we can self-host FusionAuth. Not only do we have extremely low latency for API calls, but also no rate limits. We were previously with Auth0 and their APIs and UIs were rate limited. This often made them horrifically slow.

Dan Spiteri

Hero Balancer