Self-hosted projects tagged “Chat”
104 open source projects with this tag
104 services found

Ollama
Run and manage large language models locally with an API
Ollama is a local LLM runtime that lets you pull, run, and customize models, offering a CLI and REST API for chat, generation, and embeddings.

Discourse
Modern discussion forum and community platform
Discourse is open-source forum software for community discussion, support, and knowledge sharing, with moderation tools, customization, and built-in chat.

Rocket.Chat
Self-hosted secure team chat with voice, video, and omnichannel
Rocket.Chat is an open-source communications platform for secure team messaging, channels, DMs, voice/video, integrations, and customer omnichannel support.


Novu
Open-source notifications infrastructure for inbox and multi-channel delivery
Novu is an open-source notifications platform with a unified API, workflow orchestration, and embeddable in-app inbox for email, SMS, push, and chat.

Mattermost
Secure, self-hosted team collaboration and messaging platform.
Open-source, self-hosted messaging platform for secure team collaboration with real-time chat, audio calls, screen sharing, and integrations.


Nextcloud
Open-source collaboration platform for file sync and groupware
Nextcloud is an open-source content collaboration platform providing file sync & share, groupware (calendar, contacts, mail), real-time office editing, chat and video con...


LibreChat
Self-hosted multi-provider AI chat UI with agents and tools
LibreChat is a self-hosted AI chat platform that supports multiple LLM providers, custom endpoints, agents/tools, file and image chat, conversation search, and presets.


Khoj
Open-source personal AI for chat, semantic search and agents
Self-hostable personal AI 'second brain' for chat, semantic search, custom agents, automations and integration with local or cloud LLMs.

Jitsi Meet
WebRTC-based video conferencing for the web and mobile
Self-hostable WebRTC video conferencing with chat, screen sharing, moderation tools, and SDKs for embedding meetings into web and mobile apps.

Zulip
Organized team chat with topic-based threading
Open-source team chat server with topic-based threading for focused, asynchronous, and real-time communication in distributed teams.

Huly
All-in-one platform for project management, docs, and team chat
Huly is an open-source all-in-one platform combining project management, team chat, and collaborative documentation as an alternative to tools like Jira, Linear, Slack, a...


Etherpad
Real-time collaborative text editor with plugin extensibility
Etherpad is a web-based real-time collaborative editor with chat, rich-text formatting, and a plugin framework for customization and integrations.
Lila (lichess.org)
Online chess server for real-time play, analysis, and tournaments
Lila is the open source server behind lichess.org, providing real-time chess, puzzles, analysis, tournaments, teams, and community features via web and mobile clients.

n.eko (Neko)
Self-hosted virtual browser and shared desktop via WebRTC
Neko is a self-hosted virtual browser/desktop streamed over WebRTC, enabling low-latency remote access and multi-user collaborative sessions in Docker.

Leon
Open-source personal assistant you can run on your own server
Leon is an open-source personal assistant that runs on your server, enabling privacy-focused automation through modular skills with text and optional voice interaction.


NodeBB
Modern Node.js-based forum and community discussion platform
NodeBB is a modern forum platform with real-time discussions, built-in chat, SSO options, plugins, and flexible theming, backed by Redis, MongoDB, or PostgreSQL.


Lemmy
Federated link aggregator and discussion forum platform
Lemmy is a federated, self-hostable link aggregator and forum platform for creating Reddit-like communities with voting, comments, moderation tools, and ActivityPub feder...


Tinode
Instant messaging server with multi-platform clients and APIs
Tinode is an open source instant messaging platform with a Go backend, web/mobile clients, JSON WebSocket and gRPC APIs, and support for one-to-one and group chat.


Element
Matrix-based secure messaging and collaboration client
Element is a Matrix client for secure team messaging and collaboration, offering end-to-end encrypted chats and calls with interoperability across the Matrix network.


Owncast
Self-hosted live video streaming server with built-in chat
Owncast is a self-hosted live streaming server that supports RTMP ingest, HLS playback, and built-in web chat, with optional Fediverse (ActivityPub) integration.

SimpleX Chat
Open-source encrypted messenger with no user identifiers
Open-source, decentralized messaging network built on a Haskell core with Kotlin Multiplatform and native iOS clients; end-to-end encrypted messaging without user IDs.

Typebot
Visual chatbot and conversational form builder for web and apps
Self-hostable visual builder for chatbots and conversational forms, embeddable on websites and apps with integrations, branching logic, and real-time results analytics.

BigBlueButton
Open-source web conferencing for virtual classrooms
BigBlueButton is an open-source virtual classroom and web conferencing platform with real-time audio/video, screen sharing, whiteboards, breakout rooms, polling, and reco...

Mumble
Low-latency, high-quality VoIP voice chat client and server
Mumble is an open-source, low-latency VoIP voice chat platform with a desktop client and a self-hosted server for encrypted group communication.
OnionShare
Secure, anonymous file sharing and hosting over the Tor network
Open-source tool to share files, host websites, and chat privately over the Tor network; available as desktop GUI, CLI, and mobile apps.

Spacebar
Discord-compatible self-hosted chat with voice and video
Spacebar is an open source, self-hostable Discord-compatible communication platform with text chat, voice, and video, designed to work with existing clients and bots.

ejabberd
Scalable real-time messaging server for XMPP, MQTT, and SIP
ejabberd is an Erlang/OTP-based messaging server providing XMPP chat and presence, MQTT broker capabilities for IoT, and SIP services for real-time communications.

The Lounge
Modern, responsive, self-hosted web IRC client
Self-hosted web-based IRC client with multi-user support, persistent connections, and a responsive UI for desktop and mobile.

Zammad
Web-based helpdesk and customer support ticketing system
Open source, web-based helpdesk for managing customer support tickets across multiple channels like email, chat, phone, and social media.

Colanode
Local-first collaboration workspace for chat, docs, and databases
Open-source, local-first Slack and Notion alternative combining team chat, rich docs, databases, and file management with offline-first sync and self-hosting.