Communication & Messaging

LobeChat

74K

An open-source AI chat platform with multi-model support, agent building, MCP integration, and plugin ecosystem — a self-hosted alternative to ChatGPT.

Rocket.Chat

45K

Rocket.Chat is an open-source team communication platform that combines messaging, video conferencing, and omnichannel customer engagement in a single self-hosted deployment.

Mattermost

36K

Secure collaboration, workflow and AI on sovereign infrastructure. Operational sovereignty for national security and critical infrastructure.

Mattermost

36K

Secure collaboration, workflow and AI on sovereign infrastructure. Operational sovereignty for national security and critical infrastructure.

Continue

32K

Source-controlled AI checks on every pull request. Standards as checks, enforced by AI, decided by humans.

ntfy

29K

Push notifications made easy. Simple HTTP-based pub-sub notification service for your phone or desktop.

Jitsi Meet

29K

Secure, fully featured, and completely free video conferencing. Self-hosted or use the free public instance at meet.jit.si.

Signal Android

29K

Private messaging with state-of-the-art end-to-end encryption. No ads, no trackers, no kidding.

Zulip

25K

Released under Apache-2.0, Zulip provides team chat app that uses threaded conversations to keep communication organized and efficient on self-hosted...

UVDesk

18K

Open-source enterprise helpdesk built on PHP/Symfony for customer support and ticket management

Apprise

16K

Apprise - Push Notifications that work with just about every platform! - caronc/apprise

Gotify

15K

a simple server for sending and receiving messages

Element

13K

Self-hosted communication & messaging tool that provides platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Element

13K

Element lets you run secure, communication platform by Matrix creators entirely on your own server.

SimpleX Chat

11K

SimpleX Chat is a Haskell-based application that provides most private and secure chat and applications platform - now with double ratchet E2E encryption.

For communication & messaging, Centrifugo is a self-hosted solution that provides language-agnostic real-time messaging (Websocket or SockJS) server.

AutoMQ

9.6K

AutoMQ gives you serverless Kafka alternative built on S3 on your own infrastructure.

Berty

9.1K

Berty is a TypeScript-based application that provides secure peer-to-peer messaging, always accessible.

BigBlueButton

9.1K

BigBlueButton is a self-hosted video conferencing tool that supports real-time sharing of audio.

Janus

9.1K

Released under GPL-3.0, Janus provides general-purpose, lightweight, minimalist WebRTC Server on self-hosted infrastructure.

Mumble

7.8K

Mumble handles low-latency, high quality voice/text chat software as a self-hosted solution.

Fonoster

7.7K

Released under MIT, Fonoster builds and deploy powerful voice and messaging applications on self-hosted infrastructure.

Fluxer

7.1K

Fluxer is a TypeScript-based application that provides , instant messaging and VOIP platform.

Fosscord

6.6K

Fosscord is a self-hosted communication & messaging replacement for Discord.

Spacebar

6.6K

Spacebar is a self-hosted team chat & messaging replacement for Discord and Zoom.

The Lounge

6.2K

The Lounge lets you run modern web-based IRC client entirely on your own server.

remark42

5.5K

For communication & messaging, remark42 is a self-hosted solution that provides lightweight and simple comment engine.

Isso

5.3K

Isso is a self-hosted communication & messaging replacement for Disqus.

FreeSWITCH is a self-hosted communication & messaging tool that provides scalable cross-platform telephony platform.

MiroTalk P2P

4.3K

MiroTalk P2P is a JavaScript-based application that provides simple, secure, fast real-time video conferences up to 4k and 60fps, compatible.

Campfire

4.2K

Campfire lets you install your own group chat system entirely on your own server.

Synapse

3.9K

Synapse handles server for, an open standard for decentralized persistent communication as a self-hosted solution.

Commento

3.8K

Self-hosted communication & messaging tool that provides comments widget that just works.

LibreOffice

3.8K

Self-hosted communication & messaging tool that provides complete office suite compatible.

chaskiq

3.5K

Chaskiq is a TypeScript-based application that provides versatile messaging solution for businesses to engage customers through multiple channels.

Cinny

3.5K

Cinny is a self-hosted communication & messaging tool with support for reactjs, client, matrix.

Converse.js

3.2K

Converse.js lets you run web-based XMPP/Jabber chat client entirely on your own server.

Ergo

3.1K

Ergo is a self-hosted team chat & messaging tool that provides modern IRCv3 server written in Go.

Self-hosted communication & messaging tool that provides easy to use but advanced IP PBX system, VOIP gateway and conference server.

Released under Apache-2.0, Jitsi Video Bridge provides webRTC compatible Selective Forwarding Unit (SFU) that allows for multiuser video communication on...

Openfire

3K

Openfire is a self-hosted communication & messaging tool that provides real time collaboration (RTC) server.

MiroTalk SFU

2.9K

MiroTalk SFU is a JavaScript-based application that provides simple, secure, scalable real-time video conferences up to 4k, compatible.

Stoat

2.9K

Self-hosted team chat & messaging tool that provides modern chat platform featuring text channels.

Kamailio

2.8K

Self-hosted communication & messaging tool that provides modular SIP server.

One Time Secret

2.7K

One Time Secret handles share sensitive information with self-destructing links that are only viewable once as a self-hosted solution.

Helpy

2.5K

Helpy offers support ticketing, live chat, helpcenter as a self-hosted communication & messaging.

Wire

2.5K

Released under GPL-3.0, Wire provides comprehensive collaboration platform offering end-to-end encrypted messaging on self-hosted infrastructure.

NVDA

2.5K

Self-hosted communication & messaging tool that provides NVDA: , screen reader.

Revolt

2.3K

Revolt is a self-hosted communication & messaging replacement for Discord, Microsoft Teams, and more.

AnyCable

2.3K

AnyCable lets you run realtime server for reliable two-way communication over WebSockets, Server-sent events, etc entirely on your own server.

Chitchatter

2.2K

For team chat & messaging, Chitchatter is a self-hosted solution that provides peer-to-peer chat app that is serverless, decentralized, and ephemeral.

Live Helper Chat

2.2K

For communication & messaging, Live Helper Chat is a self-hosted solution that provides live Support chat for your website.

Nextcloud Talk

2.1K

Nextcloud Talk is a self-hosted team chat & messaging replacement for Discord and Zoom.

Movim

2K

Movim offers unified communications, device compatibility, xmpp standard as a self-hosted blogging platforms.

Soundux

1.9K

Soundux is a self-hosted communication & messaging tool that provides versatile cross-platform soundboard.

Twake

1.9K

Twake is a self-hosted communication & messaging tool that provides platform for secure, productive collaboration.

Meet

1.9K

Meet is a Python-based application that provides HD video calls, screen sharing, and chats directly from the browser.

MongooseIM handles mobile messaging platform with a focus on performance and scalability as a self-hosted solution.

Briefing

1.6K

Briefing offers end-to-end encryption, group chat, user authentication as a self-hosted video conferencing.

Session

1.6K

For communication & messaging, Session is a self-hosted solution that provides session: encrypted messenger for privacy.

GlobaLeaks

1.4K

GlobaLeaks handles whistleblowing software enabling anyone to set up and maintain a secure reporting platform as a self-hosted solution.

Databag

1.4K

Databag gives you federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, on your own infrastructure.

Zola

1.4K

For communication & messaging, Zola is a self-hosted solution that provides chat application.

Mezon

1.4K

Mezon handles build your own community space for gaming as a self-hosted solution.

Jam

1.3K

Self-hosted communication & messaging tool that hosts mini conferences with friends and communities.

InspIRCd gives you modular IRC server written in C++ for Linux, BSD, Windows, and macOS on your own infrastructure.

For communication & messaging, Galene is a self-hosted solution that provides video conferencing server that is easy to deploy and that requires moderate...

Sharkord

1.2K

Sharkord is a self-hosted team chat & messaging replacement for Discord.

Convos

1.2K

Convos is a self-hosted team chat & messaging tool that provides multi-user IRC client in the browser.

Hyphanet

1.2K

Hyphanet gives you anonymously share files on your own infrastructure.

FusionPBX is a self-hosted communication & messaging tool that provides web interface for multi-platform voice switch called FreeSWITCH.

Glowing Bear is a JavaScript-based application that provides web frontend for WeeChat.

Kiwi IRC

964

Kiwi IRC gives you responsive web IRC client with theming support on your own infrastructure.

Cabal-desktop

911

Cabal-desktop is a JavaScript-based application that provides experimental P2P community chat platform.

Notifo handles multichannel notification server as a self-hosted solution.

Quassel IRC gives you distributed IRC client on your own infrastructure.

Speek

758

Speek lets you run anonymous, decentralized, and censorship-resistant messaging entirely on your own server.

PearAI

731

Self-hosted communication & messaging tool that integrates cutting-edge AI tools into a powerful code editor.

Coyim

610

Self-hosted communication & messaging tool that provides coyIM: Safe, secure, and no plugins.

Kontalk

579

Self-hosted communication & messaging tool that provides , encrypted, community-driven communication.

MiroTalk C2C is a JavaScript-based application that provides real-time cam-2-cam video calls & screen sharing.

SchildiChat

461

For communication & messaging, SchildiChat is a self-hosted solution that provides schildiChat: Enhanced Matrix client with extras.

Snikket

401

Snikket lets you run all-in-one Dockerized easy XMPP solution, including web admin and clients entirely on your own server.

PopSpace

371

PopSpace gives you virtual canvas for chatting, collaborating, and playing on your own infrastructure.

PushBits is a self-hosted communication & messaging tool that provides notification server for relaying push notifications via Matrix, similar to PushBullet...

positive-intentions Chat

303

For team chat & messaging, positive-intentions Chat is a self-hosted solution that provides decentralized chat in the browser.

Conversations is a self-hosted team chat & messaging tool that provides XMPP/Jabber client for Android.

Tracim

263

Tracim is a self-hosted communication & messaging tool that provides collaborative Platform for team collaboration: file,threads,notes,agenda,etc.

Flexisip

179

Self-hosted communication & messaging tool that provides complete, modular and scalable SIP server, includes a push gateway, to deliver SIP incoming calls.

SAMA

150

For communication & messaging, SAMA is a self-hosted solution that provides chat server with end-to-end encryption.

CrawlChat

97

For communication & messaging, CrawlChat offers a self-hosted way to convert technical documentation into intelligent AI chatbots for websites.

Continuwuity

79

For team chat & messaging, Continuwuity is a self-hosted solution that provides community-driven Matrix homeserver.

VT Chat

43

VT Chat is a self-hosted communication & messaging replacement for ChatGPT, Claude, and more.

Galae

5

Galae offers high deliverability, unlimited addresses and domains, advanced configuration as a self-hosted communication & messaging.

OpenTalk

3

Self-hosted video conferencing tool that provides secure video conferencing solution.

For communication & messaging, Freepbx is a self-hosted solution that provides web-based GUI that controls and manages Asterisk.

GNUnet handles software framework for decentralized, peer-to-peer networking as a self-hosted solution.

Jami

Jami gives you universal communication platform which preserves the user's privacy and freedoms on your own infrastructure.

Libervia is a Python-based application that provides web frontend from Salut à Toi.

Prosody IM

Prosody IM gives you feature-rich and easy to configure XMPP server on your own infrastructure.