FusionAuth
A developer-focused authentication platform available as both open-source self-hosted and managed cloud, emphasizing flexibility and data ownership.
Open source
Named by Claude in 1 list this week
How Claude rates FusionAuth.
Each score below is the model's own, on the rubric it wrote for that list, from what it already knows about FusionAuth. Nothing here is edited by us.
The best auth providers for SaaS
#6 this week, scoring 7.5 out of 10. Best for Teams that want a feature-rich auth solution with the flexibility to self-host or use managed hosting, especially those needing multi-tenancy.
- Developer Experience 7
- Decent APIs and documentation with good SDK coverage, but not as polished or intuitive as best-in-class providers.
- Feature Completeness 8
- Very comprehensive feature set including advanced MFA, passwordless, SAML, social login, and strong multi-tenancy support.
- Security & Compliance 7
- Solid security practices with SOC 2 for cloud version, though self-hosted compliance is your responsibility.
- Scalability & Reliability 7
- Scales well for most use cases with proper deployment, though less proven at extreme scale than AWS or Auth0.
- Customization & Control 9
- Excellent control with open-source option, extensive theming, and ability to self-host with full data ownership.
- Pricing Transparency 8
- Clear pricing for both self-hosted (free) and cloud versions with straightforward scaling costs.
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