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Authentication · Free picks

Free Clerk
alternatives

Free tier — meaning actually free, not "free for 14 days". Open-source self-hostable options, or vendors with a free plan you can run a real workflow on.

Reviewed by Switchpoint Editors ·

  1. 1

    WorkOS

    Enterprise-ready auth purpose-built for B2B SaaS — SSO, SCIM, and directory sync as first-class primitives.

    Free up to 1M MAU on AuthKit. SSO + Directory Sync priced per connection.

    Best for: B2B SaaS shipping SSO/SCIM to enterprise customers without per-MAU pricing surprises.

    Try WorkOS free
  2. 2

    Supabase Auth

    Open-source auth tied into a Postgres-backed BaaS — full data ownership.

    Free up to 50k MAU. Pro $25/mo + $0.00325/MAU above.

    Best for: Teams that want auth + database in one platform and the option to self-host.

    Try Supabase Auth free
  3. 3

    Auth0

    The incumbent enterprise identity platform — broadest feature set and integrations.

    Free up to 25k MAU. B2B Essentials from $150/mo.

    Best for: Larger B2B SaaS that need every enterprise compliance checkbox on day one.

    Try Auth0 free
  4. 4

    Stytch

    Developer-first auth with strong B2B org/role primitives and passwordless flows.

    Free up to 10k MAU. B2B from $249/mo.

    Best for: B2B SaaS that want flexible auth UX without building org modeling from scratch.

    Try Stytch free
  5. 5

    Keycloak

    Battle-tested open-source IAM you run yourself — no MAU costs, full data residency.

    Free, open source. Hosting and ops are on you.

    Best for: Teams with ops capacity that need on-prem or regulated-data deployments.

    Try Keycloak free
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