AnyCable - Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc. (Demo, Source Code) MITGo/Docker
Apprise - 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. MITPython/Docker/deb
Chitchatter - Peer-to-peer chat app that is serverless, decentralized, and ephemeral. (Source Code) GPL-2.0Nodejs
Conduit - A simple, fast, and reliable chat server powered by Matrix. (Source Code) Apache-2.0Rust
Databag - Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls. (Demo) Apache-2.0Docker
Element - Fully-featured Matrix client for Web, iOS & Android. (Source Code) Apache-2.0Nodejs
GlobaLeaks - Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform. (Demo, Source Code) AGPL-3.0Python/deb/Docker
Gotify - Notification server with Android and CLI clients (alternative to PushBullet). (Source Code, Clients) MITGo/Docker
Hyphanet - Anonymously share files, browse and publish freesites (web sites accessible only through Hyphanet) and chat on forums. (Source Code) GPL-2.0Java
Jami - Universal communication platform which preserves the user's privacy and freedoms. (Source Code) GPL-3.0C++
Mattermost - Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack). (Source Code) AGPL-3.0/Apache-2.0Go/Docker/K8S
Notifo - Multichannel notification server with support for Email, Mobile Push, Web Push, SMS, messaging and a javascript plugin. MITC#
Novu - Notification infrastructure for developers. (Source Code) MITDocker/Nodejs
ntfy - Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify. (Demo, Source Code, Clients) Apache-2.0/GPL-2.0Go/Docker/K8S
One Time Secret - Share sensitive information securely with self-destructing links that are only viewable once. (Demo, Source Code) MITDocker/Ruby/Nodejs
OTS - One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser. (Source Code) Apache-2.0Go
PushBits - Notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify. ISCGo
RetroShare - Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer. (Source Code) GPL-2.0C++
Revolt - Revolt is a user-first chat platform built with modern web technologies. (Source Code) AGPL-3.0Rust
Rocket.Chat - Teamchat solution similar to Gitter.im or Slack. (Source Code) MITNodejs/Docker/K8S
Screego - Screego is a simple tool to quickly share your screen to one or multiple people via web browser. (Demo, Source Code) GPL-3.0Docker/Go
Shhh - Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates. MITPython
SimpleX Chat - The most private and secure chat and applications platform - now with double ratchet E2E encryption. AGPL-3.0Haskell
Spectrum 2 - Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks. (Source Code) GPL-3.0C++
Synapse - Server for Matrix, an open standard for decentralized persistent communication. (Source Code) Apache-2.0Python/deb
Syndie - Syndie is a libre system for operating distributed forums. CC0-1.0Java
Tailchat - Next generation noIM application in your own workspace, not only another Slack/Discord/rocket.chat. (Demo, Source Code) Apache-2.0Docker/K8S/Nodejs
Tiledesk - 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). (Source Code) MITDocker/K8S
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2025-05-23 17:47:51