The communications platform that puts data protection first.

The open-source notification Inbox infrastructure. E-mail, SMS, Push and Slack Integrations.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

Send push notifications to your phone or desktop using PUT/POST

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

A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)

Scalable real-time messaging server in a language-agnostic way. Self-hosted alternative to Pubnub, Pusher, Ably. Set up once and forever.

💬 Typebot is a powerful chatbot builder that you can self-host.

screen sharing for developers https://screego.net/

SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!

Mumble is an open-source, low-latency, high quality voice chat software.

Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat

Keep passwords and other sensitive information out of your inboxes and chat logs.

Online collaborative Whiteboard that is simple, free, easy to use and to deploy

Synapse: Matrix homeserver written in Python/Twisted.

Live Helper Chat - live support for your website. Featuring web and mobile apps, Voice & Video & ScreenShare. Supports Telegram, Twilio (whatsapp), Facebook messenger including building a bot.

Realtime server for reliable two-way communication to power-up any backend

Secure peer-to-peer chat that is serverless, decentralized, and ephemeral

RetroShare is a Free and Open Source cross-platform, Friend-2-Friend and secure decentralised communication platform.