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

Danilo Polani
Senior Software Engineer @ WeRoad
“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.”

David Krizanic
Head of Architecture @ Com Laude
“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.”

Danny Davis
Wonder Giant

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

Olivier JM
Software Engineer at DoubleGDP
“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.”

Used By Great Companies

See Why G2 Ranks FusionAuth as a Leader in CIAM

Take Control of Your Identity

Build, deploy, and scale identity on your terms–without constraints.