Add Kratos SSO service

README.md

@@ -417,6 +417,7 @@ _Related: [DNS - Servers](#dns---servers)_
 - [Authelia](https://www.authelia.com/) - The Single Sign-On Multi-Factor portal for web apps. ([Source Code](https://github.com/authelia/authelia)) `Apache-2.0` `Go`
 - [Authentik](https://goauthentik.io/) - Flexible identity provider with support for different protocols. (OAuth 2.0, SAML, LDAP and Radius). ([Source Code](https://github.com/goauthentik/authentik)) `MIT` `Python`
 - [KeyCloak](https://www.keycloak.org) - Open Source Identity and Access Management. ([Source Code](https://github.com/keycloak/keycloak)) `Apache-2.0` `Java`
+- [Kratos](https://www.ory.sh/kratos/) - Next-gen identity server with Ory-hardened authentication, MFA, FIDO2, profile management, identity schemas, social sign in, registration, account recovery, and IoT auth. Golang, headless, API-only - without templating or theming headaches. ([Source Code](https://github.com/ory/kratos)) `Apache-2.0` `Golang`
 
 
 ### IT Asset Management