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FusionAuth 1.70: Least Privilege For Your Customers' AI Agents | Read more → 1 Platform Security Protect your application and user data. We live and breathe this stuff. FusionAuth provides advanced authentication, password hashing flexibility, key management, and much more to safeguard you from threats. Get a Demostart for free get started Quick response & catered demos Quick response & catered demos Check out the platform on your own. Get Started Protect Your Applications with FusionAuth The industry-standard Authorization Code grant delegates authentication and authorization to FusionAuth. Transparently configure the right amount of security for each of your applications. Require MFA, block logins using custom logic, or fire off events if a user’s password is compromised. Enable all this functionality without writing a line of code. Protect Your Users Warn your users of security threats with custom, localizable emails for events such as a breached password, use of a new device, the removal of a MFA method, or suspicious activity. Don’t worry, you can fire webhooks for ingestion into a SIEM system too. Breached password detection. Location aware security. Simple reCaptcha setup. Increase Security Over Time Improve your security by incrementally increasing the hashing factor without impacting user experience. Migrate from MD5 with custom plugins, allowing transparent user transition. Configure FusionAuth to re-hash passwords on login, using industry standard algorithms. learn more Protect your Auth System from Malicious Behavior Block threats on the fly with FusionAuth’s Advanced Threat Detection. Restrict application access and API keys by IP range. Prevent self-service registration from known domains, and intelligently rate-limit password resets, email verification and other workflows. All this without having to write a single line of additional code. 20M+ Downloads 1,000+ Logins/sec Supported 99.99% Uptime SLA 24/7 Engineer-led Support Complete Auth for Any App FusionAuth is a complete solution with no sacrifices. We got this. Go build something awesome. talk to an expert API Driven Use our customizable login flows or build your own experience on top of our APIs. Explore Docs Flexible Hosting Host yourself or use our cloud. It's always your data. Learn More Never Switch Customer Auth Providers Again Whether you are building your MVP or have hit hockey stick growth, FusionAuth is a complete auth solution with no sacrifices. We got this. Go build something awesome. get a demo platform The CIAM Platform AI & Industry Authentication Authorization Enterprise Ready Extensibility Organizations Security User Management Self-Host FusionAuth Cloud features Advanced Threat Detection API Access Biometric Authentication Breached Passwords Machine to Machine Magic Links Multi-Factor Authentication Social Logins Passkeys Passwordless Login Role-Based Access Control Session Management Single Sign-On User Registration & Login Webhooks See All Features industries Healthcare Gaming Entertainment Fintech Retail GUIDES Passwordless Authentication: A Comprehensive Guide Choosing the Best SSO Solution Choosing the Best CIAM Solution Top 10 Passwordless Auth Solutions APIs for User Management and Role-Based Access Control Auth Control Vendor Comparison Best Features for Retail CIAM Retail CIAM Pricing Models and TOC MFA Methods Compared: TOTP, SMS, Passkeys Identity Management Solutions for Enterprise Integration How FIDO2, WebAuthn, CTAP2, Passkeys Fit Together COMPAny About Us Customers Team Partners In The News Careers We're hiring! GET STARted Pricing Talk to an Expert Get Started Login Developers Get Started Quickstarts Documentation Articles FusionAuth API Community Downloads Security & Bug Reports Trust Center Resources Build vs Buy Compare FusionAuth FusionAuth Cloud Status Community Webinars Events Blog Ebooks, Demos & More Podcast & Videos Password History Logos & Guidelines Auth Workflows Auth0 Migration Alternatives Auth0 Alternatives Frontegg Alternatives Stytch Alternatives Keycloak Alternatives Firebase Alternatives Amazon Cognito Alternatives Case studies Guide To Data Security Promptfoo - AI Security Bilt - Fintech on Google Cloud Ellii - Secure Edtech Viam - Solving IoT Identity dealcloser Chooses FusionAuth Read More Subscribe for Updates Thank you! Your submission has been received! Oops! Something went wrong while submitting the form. © 2026 FusionAuth License License FAQ Privacy Policy Product Privacy Policy Cookie Policy