For an open source self hosted chat platform, the strongest matches are mattermost/mattermost (Mattermost is a self-hosted, open-source team communication platform with), basecamp/once-campfire (Once Campfire is a self-hostable team chat platform offering) and zulip/zulip (Zulip is a self-hosted team chat platform with threaded). wildfirechat/im-server and tinode/chat round out the shortlist. Each is ranked by relevance to your query, popularity and recent activity.
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Mattermost is a self-hosted, enterprise-grade communication platform designed for organizations that require strict control over their internal data and messaging infrastructure. It functions as a centralized hub for real-time team interaction, offering persistent messaging, voice and video conferencing, and integrated project management tools within a single, private workspace. The platform is built to support high-security environments, including air-gapped deployments where public internet access is restricted or unavailable. The platform distinguishes itself through a focus on regulatory
Mattermost is a self-hosted, open-source team communication platform with real-time messaging, channels, file sharing, search, web and mobile clients, and extensive integrations, directly matching the visitor's need for a private, feature-rich chat platform.
Once Campfire is a self-hosted team chat platform and real-time messaging server. It provides a web-based communication environment for internal team messaging, featuring group channels, private direct messages, and a bot-integrated system for automating external messaging services. The platform is distributed as a dockerized collaboration suite, allowing for containerized deployment with bundled application dependencies and automated SSL provisioning. The system covers a broad range of collaboration capabilities, including chat management with granular access controls, file attachment shari
Once Campfire is a self-hostable team chat platform offering real-time messaging, channels, file sharing, searchable history, and bot integrations, which fits the core intent for team communication; however, it lacks explicit mobile app support, so it is a solid match rather than the most comprehensive example.
Zulip is an open-source, self-hosted chat platform designed for real-time team communication. It organizes conversations into threaded streams, allowing users to maintain focus and manage complex discussions within a private, secure infrastructure. The project provides full control over data, authentication, and server management, making it a comprehensive solution for organizations requiring a dedicated messaging environment. The platform distinguishes itself through a hybrid backend architecture that combines a robust web framework for standard requests with an asynchronous event-streaming
Zulip is a self-hosted team chat platform with threaded real-time messaging, web and mobile clients, file sharing, search history, and extensive integration support via APIs and webhooks — exactly the kind of open-source messaging platform you're looking for.
WildfireChat’s im-server is an open-source instant messaging backend that handles message routing, user management, and group chat for private deployments. It provides a self-hosted messaging platform that can run on private infrastructure without third-party cloud dependencies, supporting enterprise messaging with group management, user directories, and external system integration. The server synchronizes messages and state across mobile, desktop, web, and mini-program clients simultaneously, and supports real-time audio/video calls with group conferencing and live streaming. It includes enc
WildfireChat's im-server is a self-hosted instant messaging backend that provides real-time messaging, group channels, and file sharing, with support for web and mobile clients, making it a solid foundation for a team chat platform.
This project is a self-hosted, cross-platform instant messaging platform featuring a Go backend and a protobuf-based messaging server. It provides a unified communication suite with native clients for iOS, Android, and web, utilizing gRPC and Protocol Buffers for efficient data exchange. The system is distinguished by an extensible chatbot framework that allows for the integration of automated bots and plugins via standardized service interfaces. It supports high-availability clustering with sharded load distribution and a pluggable database backend to ensure reliability and flexible data per
Tinode is a self-hosted, real-time instant messaging platform with native mobile and web clients, chatbot integrations, and clustering—squarely fitting the search for an open-source team chat platform, even though features like search history and file sharing are not explicitly detailed in the description.
Rocket.Chat is a self-hosted communication platform designed for organizations to maintain full control over their messaging infrastructure and data. It functions as a scalable collaboration suite that supports growing teams by managing consistent configuration cycles across diverse deployment environments. The platform distinguishes itself through a modular architecture that allows for deep customization of enterprise collaboration workflows. It features a sandboxed application engine that enables developers to build and integrate custom tools and plugins within an isolated environment, ensu
Rocket.Chat is a self-hostable, open-source team communication platform that covers real-time messaging, multi-user channels, file sharing, search history, web and mobile clients, and integrations via webhooks/APIs — exactly the kind of tool this search is after.
This project is a full-stack web application designed for real-time messaging and user account management. It provides a platform for exchanging text messages instantly and tracking the active network status of participants to indicate availability. The application utilizes a unified JavaScript stack to handle both client-side interface rendering and server-side data processing. It features a single-page application architecture that updates the user interface dynamically without requiring full page reloads, while maintaining persistent bidirectional connections to ensure that conversations u
A real-time chat app built with MERN and Socket.io, which fits the category of a team messaging platform, though the sparse description does not confirm the additional features (channels, file sharing, search, mobile apps, integrations) that this search expects.