Self-hosted projects tagged “Chat”

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.

MITActively maintained

Alternative to:

OpenAI API+15

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

GPL-2.0Actively maintained

Alternative to:

Flarum Cloud+11

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

Actively maintained

Alternative to:

Rocket.Chat Cloud+19

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.

MITActively maintained

Alternative to:

ChatGPT+11

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

Actively maintained

Alternative to:

Novu Cloud+4

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

Actively maintained

Alternative to:

Slack+19

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

AGPL-3.0Actively maintained

Alternative to:

Google NotebookLM+16

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

AGPL-3.0Actively maintained

Alternative to:

Google Drive+19

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

Apache-2.0Actively maintained

Alternative to:

Zoom+12

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, and Notion.

EPL-2.0Actively maintained

Alternative to:

Linear+19

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

Apache-2.0Actively maintained

Alternative to:

Zulip Cloud+19

Neko is a self-hosted virtual browser/desktop streamed over WebRTC, enabling low-latency remote access and multi-user collaborative sessions in Docker.

Apache-2.0Actively maintained

Alternative to:

Hyperbeam+10

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.

AGPL-3.0Actively maintained

Alternative to:

Signal+11

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.

AGPL-3.0Actively maintained

Alternative to:

Chess.com

Etherpad is a web-based real-time collaborative editor with chat, rich-text formatting, and a plugin framework for customization and integrations.

Apache-2.0Actively maintained

Alternative to:

Etherpad Cloud+9

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.

MITActively maintained

Alternative to:

Amazon Alexa+6

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.

GPL-3.0Actively maintained

Alternative to:

Discourse+14

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

AGPL-3.0Actively maintained

Alternative to:

Reddit+3

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.

GPL-3.0Actively maintained

Alternative to:

Telegram+13

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.

AGPL-3.0Actively maintained

Alternative to:

Element Matrix (Hosted)+19

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

MITActively maintained

Alternative to:

YouTube+12

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

Actively maintained

Alternative to:

ChatBot.com+9

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

LGPL-3.0Actively maintained

Alternative to:

Zoom+14

Mumble is an open-source, low-latency VoIP voice chat platform with a desktop client and a self-hosted server for encrypted group communication.

Actively maintained

Alternative to:

Skype+4

Open-source shadcn/ui-based component library for building ChatGPT-style and MCP apps with production-ready, customizable UI blocks.

Open-source tool to share files, host websites, and chat privately over the Tor network; available as desktop GUI, CLI, and mobile apps.

Actively maintained

Alternative to:

Send Anywhere+8

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.

Actively maintained

Alternative to:

CloudMQTT+11

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.

AGPL-3.0Actively maintained

Alternative to:

Discord+19

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

MITActively maintained

Alternative to:

The Lounge Cloud+3

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

AGPL-3.0Actively maintained

Alternative to:

Zendesk+19