Atrium

Atrium is a self-hosted client portal that replaces scattered tools with a single branded experience your clients log into. It handles project tracking with custom status pipelines, file sharing across S3, MinIO, R2, or local storage, invoicing with PDF generation, and white-label branding. Built with a multi-tenant architecture, role-based access control, and magic link authentication via Better Auth. Setup is as simple as git clone and docker compose up.