Ory Kratos – Open-source identity server written in Go

In plain words

Ory Kratos is an open-source identity server built with Go that handles user authentication and account management. It is designed for developers building applications that need secure login, registration, and user profile features. The software runs on developers' own infrastructure, giving them direct control over user data and authentication flows without relying on third-party services.

written from the facts on this page · September 2026

From the sources

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.

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  Open-source Auth0 alternative Ory Kratos v0.13 released – nearing v1.02023 · github.com · ▲88

  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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  OSS Auth0 Alternative Ory Kratos Now with Full PassKey Support2024 · github.com · ▲41

  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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  Open Source Auth0 alternative Ory Identifier First Auth and OTP MFA2024 · github.com · ▲11

  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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  React Native template for open source identity provider Ory Kratos2020 · getory.io · ▲51

  Developer documentation for Ory

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  Open-source OAuth2 & OpenID server Ory Hydra v22022 · github.com · ▲108

  Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go. -

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  Run your own OAuth2/OpenID Connect provider2016 · github.com · ▲161

  Internet-scale OpenID Certified™ OpenID Connect and OAuth2.1 provider that integrates with your user management through headless APIs. Solve OIDC/OAuth2 user cases over night. Consume as a service on Ory Network or self-host. Trusted by OpenAI and many others for scale and security. Written in Go. -

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