Compare software

Ory KratosZitadel
Free

Free to self-host; Ory also sells a hosted version through Ory Network.

 Freemium

Open source for self-hosting, with a hosted service that has a free starting plan and paid…

Self-hosted Web, Self-hosted
  • Supports passkeys, social sign-in, OIDC, SAML and TOTP
  • API-first design leaves the login UI fully under your control
  • Self-hostable, with deployment documentation
  • Built-in MFA, passwordless and social login
  • Headless, so you must build or adopt your own login pages
  • Aimed at developers rather than end users
  • Aimed at developers integrating identity into applications
  • Running it yourself means operating an identity service
Self-hosted Self-hosted, Hosted service
Open source Open source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.