FreeScout is a modular, open-source shared inbox and help‑desk app for collaborative email-based support and small-team ticketing. Its core is AGPL and intentionally lightweight. One-sentence value: FreeScout lets teams manage customer email and tickets with full control over data, avoiding per-agent SaaS fees and vendor-hosted data. It targets freelancers,

NodeBB is an open-source, Node.js-based forum platform with real-time WebSocket UX and an extensible plugin and theming system. It provides real-time notifications, a plugin system, theming, and REST APIs for integration. The product delivers fast, single-page-style forum experiences for threaded community discussions. It suits personal makers, small teams, and

Mattermost is an open-source team messaging and collaboration platform you can run on your own infrastructure. It provides channels, threaded messages, direct messages, file sharing, search, and native clients across desktop and mobile while emphasizing security, privacy, and DevOps integrations. The product is available as a Community (self-hosted) edition and

Rocket.Chat is an open-source, self-hostable team chat and real-time collaboration platform that provides messaging, threads, audio/video calls, federation and an apps marketplace. It offers multi-platform clients (web, desktop, mobile), encryption options, an integrations marketplace and deployment tooling to run on-premises, in cloud VMs, or Kubernetes. This tool is

Chaskiq is an open‑source, self‑hostable customer messaging platform that combines live chat, in‑app messaging, campaign broadcasts, bots, a help center, and video/screen sharing. It’s designed for support, sales and marketing workflows where teams want to run messaging infrastructure on their own infrastructure and keep full

Chatwoot is an open‑source, omnichannel customer engagement platform that consolidates live chat, email, social messengers, SMS, and WhatsApp into a single inbox. It offers a modern agent workspace with collaboration, automation, and reporting built in. It’s aimed at SMBs, startups, and engineering‑led teams that want affordable, extensible

osTicket is an open-source, web-based help desk and ticketing system that centralizes customer inquiries from email, web forms, and phone into a single queue. It provides agents with a multi-user interface to track, triage, and resolve requests while keeping communication threaded and searchable. It’s designed for teams that want