Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.  - GitHub - ory/kratos: Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.

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Ory Kratos is an open-source, API-first identity and user management system written in Go that handles authentication flows like login, registration, account recovery, and multi-factor authentication. It offers deployment options through the managed Ory Network or self-hosted installations with optional enterprise licensing for production workloads. The system integrates with other Ory components (Hydra for OAuth2/OIDC, Oathkeeper for access proxy, Keto for permissions) and is used by major companies including OpenAI, Fandom, Cisco, and Klarna to manage billions of users.

ory/kratos: Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sig

Ory Kratos is an API first identity and user management system for cloud native applications. It centralizes login, registration, recovery, verification, and profile management flows so your services consume them instead of reimplementing them.

Migrating from Auth0, Okta, and similar providers