Identity Without Constraints
The only CIAM platform built to deploy anywhere, give you total control, and scale across any modern architecture–no matter how complex.
Identity, Your Way
FusionAuth secures access for humans, services, and AI across any environment–giving you full control over how identity is deployed, integrated, and scaled.
API-Driven by Design
Every identity capability is available via API and built to integrate into your product, pipelines, and workflows.
Auth for Humans, Systems, and AI
Authenticate users, services, and AI; and control what they can access with fine-grained authorization.
Predictable Pricing
Scale users, regions, and workloads with no surprises or growth penalties.
Deploy Anywhere
Run identity self-hosted, dedicated, on-prem, hybrid, or
air-gapped–wherever your business and regulations demand.
Don’t Let Identity Become the Bottleneck
Most CIAM platforms force tradeoffs–between speed and security, convenience and control, growth and cost predictability. FusionAuth is built for teams who don’t want to compromise.
Ship faster
By removing identity from your product roadmap
Scale confidently
Across users, regions, and AI-driven workloads
Increase revenue
Without re-architecting for security, compliance, and control
Reduce risk
With isolated infrastructure and full control over upgrades and data
No forced SaaS upgrades.
No shared infrastructure blast radius.
No unpredictable pricing.
No identity decisions that box you in later.
Built for Teams Running Critical Systems
Designed for Real-World Use Cases
Complex User Models
Supports high scale B2C, B2B, B2B2C, partners, APIs, and machine-to-machine identity.
Enterprise-Grade Isolation
Dedicated deployments with predictable performance and controlled upgrades.
Built to Evolve With Your Business
Extend, customize, and adapt identity as your product and market changes.
Data Sovereignty & Compliance
Deploy in any geography to meet regulatory, privacy, and governance requirements.
Download FusionAuth’s Free Community Edition
Sign up for our Free Community Edition to test drive FusionAuth today.
Trusted By Engineering Teams
Trusted by 20+ Million Developers
“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.”
“With FusionAuth, 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
“The FusionAuth team has been extremely helpful. They really give you the attention you need to solve any identity challenge.”
Danny Davis
Wonder Giant
“I use FusionAuth for authentication in my react app, and it has been incredibly beneficial. I don't need to create my own authentication system from scratch, which saves me a lot of time and effort.”
Olivier JM
Software Engineer at DoubleGDP
Used By Great Companies
