rise-republic/logto

Logto is a modern, open-source authentication and authorization infrastructure designed for SaaS and AI applications, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC capabilities. It provides pre-built sign-in flows, customizable UIs, and SDKs for 30+ frameworks, making it easier to implement secure authentication without dealing with complex protocols. The project is ideal for development teams building scalable SaaS platforms, AI applications, or agent-based architectures who need enterprise-grade auth features without the overhead of traditional solutions like Auth0 or Firebase.