FusionAuth is a self-hostable CIAM platform offering authentication, MFA, SSO and fine-grained authorization via APIs.
- for
- Developers and teams building apps that need customizable, scalable identity management.
- pricing
- freemium
Key features
- API-first identity — All authentication, authorization and user management functions are exposed via full-featured APIs.
- Multi-factor authentication — Supports basic TOTP as well as advanced MFA methods like email, SMS, voice and intelligent policies.
- Enterprise-grade isolation — Dedicated deployments with controlled upgrades and HA hosting for critical workloads.
- Customizable theming — Advanced application theming and internationalized UI for branded login experiences.
- Passkeys & WebAuthn — Passwordless authentication using WebAuthn cross-platform authenticators.
- Flexible deployment — Run on-prem, self-hosted, hybrid, air-gapped or in FusionAuth Cloud.
Use cases
- Add passwordless login with passkeys to a React web app
- Secure machine-to-machine APIs with OAuth2 client credentials
- Implement MFA for a B2B SaaS platform with intelligent challenge policies
- Deploy a compliant identity solution in a regulated geography
FusionAuth pricing
- CommunityFreeCore authentication features · Unlimited users · Self-hosted
- Starter$162/month (billed annually)Advanced MFA · Application theming · Basic hosting
- Essentials$240/month (billed annually)Advanced connectivity · Custom OAuth scopes · 24-48h email support
FusionAuth vs alternatives
 FusionAuth |  Clerk |  Corbado | |
|---|---|---|---|
| Best for | Self-hosted CIAM with predictable pricing | SaaS user management | Passkey-first auth for React/Next.js |
| Pricing | Freemium | Free | Free |
| DevHunt upvotes | 9 | 61 | 73 |
| Launched | May 2024 | Apr 2024 | Mar 2024 |
- FusionAuth vs Clerk: Clerk is a SaaS-only user management platform, while FusionAuth can be self-hosted with unlimited users.
- FusionAuth vs Corbado: Corbado focuses on passkey-first authentication for specific front-end frameworks, whereas FusionAuth offers broader CIAM features and deployment flexibility.
FusionAuth FAQ
Can FusionAuth be run on my own infrastructure?+
Yes, FusionAuth offers self-hosted, on-prem, hybrid and air-gapped deployment options.
What authentication standards does FusionAuth support?+
It supports OAuth 2.0, OpenID Connect, SAML v2, WebAuthn, and password-less magic links.
Is there a free version available?+
The Community edition is free, unlimited and includes core authentication features.
How is pricing structured for larger deployments?+
Plans are tiered (Starter, Essentials, Enterprise) with predictable monthly fees and no per-user growth penalties; Enterprise pricing is custom.
What support options are provided?+
Community plans get forum, Slack and GitHub support; paid plans add email support, live engineering assistance and 24/7 support for Enterprise.
Summarized by DevHunt from fusionauth.io · Sep 28, 2026. Details may change; check the official site.
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