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Open Source Projects tagged "Chat"

A curated collection of the best open source projects tagged "Chat". Each listing includes a website screenshot along with a detailed review of its features.

LobeChat

AI
Manage, build, and run AI agent teams around the clock

  • Stars

    84,049

  • Last commit

    9 hours ago

  • License

    Unknown
A collaborative platform to create, schedule, and operate AI agents that handle long-running tasks, team workflows, and automated jobs without constant oversight.

Open Source Alternative to:

Claude

Rocket.Chat

Self-hosted team messaging with voice, video, and AI

  • Stars

    46,373

  • Last commit

    9 hours ago

  • License

    MIT
Open source communication platform combining messaging, voice, video, and AI for organizations that need full data control, air-gapped deployments, and zero-trust security.

Open Source Alternative to:

Discord

Khoj

AI
AI second brain for research, automation, and personal agents

  • Stars

    38,007

  • Last commit

    3 months ago

  • License

    AGPL-3.0
Self-hostable AI assistant that connects to your docs and the web, lets you build agents, schedule automations, and run research with verifiable citations.

Open Source Alternative to:

Claude

Zulip

Organized team chat for distributed teams

  • Stars

    26,179

  • Last commit

    10 hours ago

  • License

    Apache-2.0
Zulip is an open-source team chat app that uses threaded conversations to keep communication organized and efficient for teams of all sizes.

Open Source Alternative to:

Microsoft Teams

Lemmy

Build your own federated discussion community

  • Stars

    14,666

  • Last commit

    17 hours ago

  • License

    AGPL-3.0
Open-source forum and link aggregator that connects communities across the fediverse. Self-hosted, ad-free, with powerful moderation tools and federation.

Open Source Alternative to:

Reddit

Colanode

Self-hosted team workspace with chat, docs, and databases

  • Stars

    5,187

  • Last commit

    7 months ago

  • License

    Apache-2.0
Local-first collaboration platform combining real-time chat, rich text pages, databases, and file management in a single self-hostable workspace.

Open Source Alternative to:

Notion

Chaskiq

Open-source customer communication platform

  • Stars

    3,581

  • Last commit

    4 months ago

  • License

    Unknown
Versatile messaging solution for businesses to engage customers through multiple channels, with AI-powered automation and analytics.

Open Source Alternative to:

Open

Quiet

Serverless team chat over Tor, no phone number needed

  • Stars

    2,660

  • Last commit

    4 days ago

  • License

    GPL-3.0
Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.

Open Source Alternative to:

Discord

Mezon

Create custom spaces to chat, game, and connect globally

  • Stars

    2,012

  • Last commit

    10 hours ago

  • License

    MIT
Build your own community space for gaming, chatting, and hanging out with friends worldwide. Customize your environment for the perfect social experience.

Open Source Alternative to:

Discord

Zola

AI
AI chat companion with versatile model support

  • Stars

    1,539

  • Last commit

    11 months ago

  • License

    Apache-2.0
Open-source chat application that lets you interact with multiple AI models in one interface, offering flexible conversations and diverse capabilities.

Open Source Alternative to:

Claude

UnInbox

Transform team email into efficient collaborative workflows

  • Stars

    1,761

  • Last commit

    9 months ago

  • License

    AGPL-3.0
Streamline team communication with shared inboxes, unlimited email addresses, and customizable workflows. Perfect for modern businesses seeking organized email management.

Open Source Alternative to:

Gmail

Hazel

Team chat with native GitHub and Linear integrations

  • Stars

    733

  • Last commit

    16 hours ago

  • License

    FSL-1.1-ALv2
Team chat for developers with threads, full-text search, keyboard-first navigation, GitHub and Linear previews, desktop apps, and message sync with Slack and Discord.

Open Source Alternative to:

Discord

Ethora

Messaging SDK with AI agents for web, iOS, and Android

  • Stars

    552

  • Last commit

    1 day ago

  • License

    Apache-2.0
Build branded chat apps with AI agents, group messaging, document exchange, and digital wallets using React and React Native components.

Open Source Alternative to:

Stream

Valour

Community-driven platform built for transparency

  • Stars

    400

  • Last commit

    9 hours ago

  • License

    AGPL-3.0
Open-source communication platform with multi-window chat, economy systems, and privacy-first approach. Built by communities for superior performance.

Open Source Alternative to:

Discord

Twake Chat

Secure open source messaging for professional teams

  • Stars

    173

  • Last commit

    11 hours ago

  • License

    AGPL-3.0
Free Matrix-based messenger with end-to-end encryption, multi-platform bridges, and on-premise deployment. Connect across 30+ networks securely.

Open Source Alternative to:

WhatsApp

SAMA

Secure, scalable chat server for modern applications

  • Stars

    161

  • Last commit

    1 month ago

  • License

    GPL-3.0
Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps

Open Source Alternative to:

Discord

Tiledesk

AI
No-code platform to build AI agents and automate support

  • Stars

    15

  • Last commit

    3 days ago

  • License

    MIT
Build AI chatbots, automate customer support workflows, and connect live agents across web, WhatsApp, email, and voice with a no-code visual designer.

Open Source Alternative to:

Intercom
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