SaaS auth stack - reviewed 2026-10-05
Authentication Tools for SaaS 2026: Clerk, Auth0, WorkOS, Better Auth, and Stytch
Compare SaaS authentication tools by use case: startup login, B2B SSO, SCIM, passwordless auth, passkeys, self-hosted control, and enterprise readiness.
SaaS auth is no longer just login and signup. Modern products often need organizations, roles, passkeys, enterprise SSO, SCIM, audit logs, fraud controls, and a clean developer experience. This page separates hosted auth providers from enterprise identity layers and open-source options so teams can choose the right level of control.
Quick recommendation
Use this page when you are choosing auth for a new SaaS app or replacing custom login code before enterprise customers arrive.
category
Auth
reviewed
3 tools
also consider
3 tools
Decision matrix
| If you need | Shortlist | Why |
|---|---|---|
| Fast product launch with polished hosted components | Clerk | Clerk is strongest when signup, user profiles, organizations, and frontend integration speed matter. |
| Enterprise SSO, SCIM, directory sync, and audit logs | WorkOS or Auth0 | WorkOS focuses on enterprise readiness as infrastructure, while Auth0 offers a broader identity platform. |
| Maximum TypeScript control and open-source flexibility | Better Auth or Lucia-style custom auth | Open-source auth is a better fit when you want ownership of sessions, database schema, and business logic. |
| Passwordless, passkeys, and consumer identity risk controls | Stytch | Stytch is worth evaluating when auth UX and fraud/risk controls are central to the product. |
Reviewed auth tools
Full reviews include pricing notes, pros and cons, best-fit users, and alternatives.
| Tool | Rating | Pricing | Best for | Review |
|---|---|---|---|---|
Clerk The default auth recommendation for new projects in 2026 | 5/5 | Free up to 10,000 MAU. Pro starts at $25/month, then $0.02 per MAU. | Any new project where shipping auth fast matters — the default choice unless you have specific SAML SSO or regulatory requirements | review → |
Lucia Best self-hosted auth library for full control and zero per-MAU cost | 4/5 | Fully open source and free. You pay for your own database and hosting only. | Teams with strict data residency requirements, or engineers who want to own auth as a first-class internal system with no per-user cost | review → |
Auth0 Best for enterprise software with SAML SSO and compliance requirements | 3/5 | Free up to 7,500 MAU. Pro from $23/month. B2B Enterprise from $800/month. | Enterprise B2B software where customers require SAML SSO or where regulatory compliance certifications are required by contract | review → |
Other tools worth checking
WorkOS
enterprise SSO, SCIM, directory sync, audit logs, and B2B SaaS enterprise readiness
More enterprise-infrastructure focused than consumer auth providers.
Better Auth
framework-agnostic TypeScript auth with plugins for passkeys, two-factor, organizations, and integrations
A fast-moving open-source option to consider when you want more control than hosted auth.
Stytch
passwordless auth, passkeys, fraud controls, and consumer identity flows
Useful when auth UX and risk controls matter more than a simple login widget.
Next step
If you are still narrowing the field, start with the ranked category guide, then open the closest pairwise comparison for your top two vendors.