Best self-hosted Communication - Custom Communication Systems apps

Rocket.Chat

★ 45,690

Rocket.Chat is a complete communication platform (chat, voice, video) that puts data protection first. It's the self-hosted alternative to Slack for companies that need control and compliance.

Novu

★ 39,184

Notification infrastructure for developers.

Mattermost

★ 38,130

Mattermost is a secure team chat, similar to Slack, geared toward development and integrated with Git. Self-hosted, it keeps the company's conversations and files on your own infrastructure.

Chatwoot

★ 33,251

Chatwoot is a customer support hub (live chat, email, social media) in one place. It's the self-hosted alternative to Intercom and Zendesk, with no per-agent cost.

ntfy

★ 30,915

Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.

Zulip

★ 25,389

Zulip is a powerful, open source group chat application.

Apprise

★ 16,775

Apprise allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc.

Gotify

★ 15,165

Notification server with Android and CLI clients (alternative to PushBullet).

Tinode

★ 13,391

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots.

Element

★ 13,233

Fully-featured Matrix client for Web, iOS & Android.

SimpleX Chat

★ 11,315

The most private and secure chat and applications platform - now with double ratchet E2E encryption.

Centrifugo

★ 10,427

Language-agnostic real-time messaging (Websocket or SockJS) server.

Screego

★ 10,422

Screego is a simple tool to quickly share your screen to one or multiple people via web browser.

Typebot

★ 10,058

Conversational app builder (alternative to Typeform and Landbot).

Mumble

★ 8,073

Low-latency, high quality voice/text chat software.

WorkAdventure

★ 5,535

Virtual office / virtual conference application presented as a 16-bit RPG video game.

One Time Secret

★ 2,845

Share sensitive information securely with self-destructing links that are only viewable once.

Tox

★ 2,649

Distributed, secure messenger with audio and video chat capabilities.

WBO

★ 2,612

Web Whiteboard to collaborate in real-time on schemas, drawings, and notes.

Stoat

★ 2,495

Stoat is a user-first chat platform built with modern web technologies.

AnyCable

★ 2,341

Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc.

Chitchatter

★ 2,290

Peer-to-peer chat app that is serverless, decentralized, and ephemeral.

Tuwunel

★ 2,225

High-performance and feature-rich chat server for Matrix, and the successor to conduwuit (fork of Conduit).

Live Helper Chat

★ 2,220

Live Support chat for your website.

RetroShare

★ 1,987

Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer.

GlobaLeaks

★ 1,489

Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform.

Databag

★ 1,462

Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls.

Hyphanet

★ 1,185

Anonymously share files, browse and publish _freesites_ (web sites accessible only through Hyphanet) and chat on forums.

Conduit

★ 946

A simple, fast, and reliable chat server powered by Matrix.

Notifo

★ 875

Multichannel notification server with support for Email, Mobile Push, Web Push, SMS, messaging and a javascript plugin.

OTS

★ 765

One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser.

Spectrum 2

★ 417

Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks.

Shhh

★ 415

Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates.

PushBits

★ 361

Notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify.

Tiledesk

★ 304

All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots (alternative to Intercom, Zendesk, Tawk.to and Tidio).

SAMA

★ 157

Next-Gen self-hosted chat server and clients.

Continuwuity

Community-driven Matrix homeserver, the continuation of conduwuit focusing on user experience and new features (fork of Conduit).

GNUnet

Software framework for decentralized, peer-to-peer networking.

Groupboard

Online whiteboard, audio/video conferencing, screen sharing, shared code editing and optional session recording/playback.

Jami

Universal communication platform which preserves the user's privacy and freedoms.

PrivMX WebMail

Alternative private mail system - web-based, end-to-end encrypted by design, self-hosted, decentralized, uses independent PKI. Easy to install and administrate, freeware, open-source.

TrueConf

Platform for your corporate communications, based on the advanced architecture, with support for UltraHD video conferencing, built-in messenger with personal and group chats, and a free version for up to 1,000 users.

Virola Messenger

Instant messaging and collaboration tool with private and group chat rooms, continuous voice and video meetings, files sharing, issue tracking with integrated task board (alternative to Slack).