ZITADEL

ZITADEL 是开源的身份基础设施，把用户目录、登录页、多因素认证与授权放在一套服务里，对外走 OIDC、OAuth2 与 SAML 这些标准协议。它按「组织」做多租户隔离，每个租户能有自己的登录品牌与策略，适合做 B2B 产品里给客户开子账号的场景。自带登录页可直接用，也能通过 API 自建界面；支持 passkey、社交登录与审计日志。云版按活跃用户计费，也能自托管在 Kubernetes 上。 ⭐ GitHub: zitadel/zitadel — 15k stars 🔗 文档: https://zitadel.com/docs

ZITADEL is open-source identity infrastructure that puts the user directory, login pages, multi-factor authentication and authorization into one service, speaking OIDC, OAuth2 and SAML outward. Tenancy is organised by organisation, each with its own login branding and policy, which suits B2B products opening sub-accounts for customer companies. A hosted login UI works out of the box and can be replaced with a custom one through the APIs; passkeys, social logins and audit logs are included. The cloud tier bills by monthly active users, and Kubernetes self-hosting is supported. ⭐ GitHub: zitadel/zitadel — 15k stars 🔗 Docs: https://zitadel.com/docs