basecamp/once-campfire

Campfire is web-based chat application. It supports many of the features you'd expect, including: Multiple rooms, with access controls Direct messages File attachments with previews Search Notifications (via Web Push) @mentions API, with support for bot integrations Campfire is single-tenant: any rooms designated "public" will be accessible by all users in the system. To support entirely distinct groups of customers, you would deploy multiple instances of the application.