Ory Kratos
Next-gen identity server with Ory-hardened authentication
..., custom identity models, and bring your own UI. Ory Kratos is open-source and grows more powerful with every pull-request. Ory Kratos is written in Go and we provide SDKs for every language. Customizable login, registration, and profile management without complexity. Users create and sign in to accounts using username/email and password combinations, Social Login, passwordless flows, TOTP and more.