Open-Source IAM
Stack Auth
Capability scores
Methodology →- Authentication
- 4.5
- SSO & Federation
- 4.5
- Authorization
- 4.0
- Lifecycle & Provisioning
- 3.5
- MFA & Passwordless
- 4.0
- Governance & Audit
- 3.0
- Developer Experience
- 4.5
- Deployment Flexibility
- 5.0
- Pricing Transparency
- 5.0
- Support & Ecosystem
- 3.0
Scored 0–5 against a published rubric. Independent analysis, no vendor sponsorship.
Overview
Stack Auth is an open-source authentication and user-management platform positioned as a self-hostable alternative to managed providers, with strong React and Next.js support.
Capability deep-dive
Good developer experience, B2B features, and the freedom to self-host are the strengths. As a young project, its ecosystem and enterprise references are still building.
Pricing
Open-source free; managed cloud usage-based.
Bottom line
A promising open-source, self-hostable alternative to managed auth providers.
Independent editorial review. Author: Deepak Gupta. Last evaluated 2026-06-10.