Loading SaaS profile...
Loading SaaS profile...
Single-tenant authentication and user management.
Provides ready-to-use registration and login pages. Manages multi-factor authentication (MFA) and passkeys. Handles complex enterprise Single Sign-On (SSO). Secures APIs with machine-to-machine authentication. Allows complete self-hosting on local servers or private clouds.
Single-Tenant Security: Keeps your user data completely isolated, preventing the 'noisy neighbor' disruptions and security vulnerabilities common in multi-tenant SaaS. Deployment Freedom: Can be downloaded and run anywhere—on a local laptop, an air-gapped server, or managed via FusionAuth Cloud. API-First Design: Built strictly for developers, allowing every single configuration and workflow to be managed via scripts and SDKs in any language. Transparent Pricing: Does not punish growth; it offers a highly capable free Community edition without hidden fees for basic active users. B2B Capabilities: Natively handles complex Business-to-Business-to-Consumer (B2B2C) structures, allowing customized login rules for different clients.
Category: Utilities & System Tools
Team Size: 60
Visit Website
FusionAuth is a developer-first Customer Identity and Access Management (CIAM) platform. It allows engineering teams to easily add secure login, registration, and multi-factor authentication to their applications. Unlike multi-tenant competitors, it offers a single-tenant architecture that can be self-hosted anywhere for total data control.
In 2007, Brian Pontarelli built a Java profanity filter for the booming video game industry. Over the next decade, while running his software company, he constantly found himself rewriting the exact same complex authentication and login systems for every new client project. Realizing that multi-tenant SaaS tools like Auth0 forced companies to surrender control of their user data, Brian pivoted his team. In 2018, they launched FusionAuth—a developer-first identity platform you could actually own and host yourself.
