Team Chat

An open-source cross-platform alternative to AirDrop

The Secure CommsOS™ for mission-critical operations

Open-source scheduling infrastructure

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

Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.

Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬

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

Conversational RPA SDK for Chatbot Makers. Join our Discord: https://discord.gg/7q8NBZbQzt

An open-source screen recorder built with web technology

Open source Loom alternative. Beautiful, shareable screen recordings.

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

IM Chat OpenClaw

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

A free, self-hostable news aggregator…

🐀 A decentralised discussion platform for communities.

A fully open source & end-to-end encrypted note taking alternative to Evernote.

Take control over your live stream video by running it yourself. Streaming + chat out of the box.

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

Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

A free and open source instant messaging and VoIP platform built for friends, groups, and communities. Self-hosting and more activity in this repository is coming very soon! See the README.

🚀 The open-source alternative to Twilio.

Collaborative office suite, end-to-end encrypted and open-source.

📬 Spacebar is a free open source selfhostable discord compatible communication platform

Open-source online project task management tool with docs, mind maps, flowcharts, IM, and file management.

The Open-Source Email Platform

Open-source and local-first Slack and Notion alternative that puts you in control of your data

FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)

Open source alternative to Resend, Sendgrid, Postmark etc.

A full featured Live Chat, Support & Marketing platform, alternative to Intercom, Drift, Crisp.

Mail hosting made simple

WPPConnect is an open source project developed by the JavaScript community with the aim of exporting functions from WhatsApp Web to the node, which can be used to support the creation of any interaction, such as customer service, media sending, intelligence recognition based on phrases artificial and many other things, use your imagination

Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability

Slack alternative for communities with searchable content.

Desktop client that bridges agents to chat platforms.

open-source sms-gateway. turn any android phone into an sms gateway

Helpy is a modern, open source helpdesk customer support application. Features include knowledgebase, community discussions and support tickets integrated with email.

Open source, self-hosted omnichannel customer support desk. Live chat, email, and more in a single binary.

Open source video conferencing app powered by LiveKit. Built with Django and React.

An open-source platform for legally compliant email archiving.

Notifuse is an open-source & modern emailing platform

Twake is a secure open source collaboration platform to improve organizational productivity.

Open-source meeting transcription API for Google Meet, Microsoft Teams & Zoom. Auto-join bots, real-time WebSocket transcripts, MCP server for AI agents. Self-host or use hosted SaaS.

Modern email for teams and professionals. A replacement for outdated email technology and tools. Alt to hey.com, front.com, missiveapp.com

Mozilla's Localization Platform

Mezon is a new way to communicate with your team. It's faster, better organized, better for WFH.

AgentNetworkProtocol(ANP) is an open source protocol for agent communication. Our vision is to define how agents connect with each other, building an open, secure, and efficient collaboration network for billions of intelligent agents.

Natively - Free open-source AI interview copilot & meeting assistant. The best Cluely alternative, Final Round AI alternative, and Interview Coder alternative. Real-time transcription, undetectable stealth mode, local RAG, BYOK. No subscriptions. No data breaches.

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

Castopod is an open-source hosting platform made for podcasters who want engage and interact with their audience. Synchronized read-only mirror of https://code.castopod.org/adaures/castopod

Browser-based AAC communication board with text-to-speech.

Open-source, customer support platform with fully customizable AI support agents for developers / startups shipping SaaS.

Znuny is a free, open-source, and versatile web-based ticketing system for Customer Service, Help Desk, IT Service Management, and more. It is built for transparency and long-term sustainability and is highly tailorable to your organization's needs.

Open-source engine for chat 💬, AI assistants 🤖 & wallets 🪪. React, Typescript, Python, XMPP. Build future apps with chat, AI agents and web3.

A self-hosted dead man's switch for delivering encrypted messages (E2EE) to your loved ones — when you're gone or unresponsive.

Open PaaS Enterprise Social Network

Virtual Mailbox Administration

Linphone is a free VoIP and video softphone based on the SIP protocol. Mirror of git://git.linphone.org/linphone-desktop.git

Open-source Calendly alternative running on Cloudflare's free tier. Meeting scheduler with Google Calendar and Outlook sync.

The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.

The open-source, self-hosted video conferencing software. Scalable, customizable, and with a powerful AI Meeting Agent.

Self-hosted private chat — No cloud, no telemetry, no Big Tech. Discord alternative that runs on your own machine.

Install Tiledesk on your server using Helm for Kubernetes orchestration and Docker Compose for running multi-container Docker applications. Tiledesk provides an open-source solution comparable to Voiceflow, empowering you to create sophisticated LLM-enabled chatbots that seamlessly transition interactions to human agents when needed.

Video calls, chat, photo sharing, and community server platform.

📱 Wire for iOS (iPhone and iPad)

Open source alternative to Canny, UserVoice, Productboard

Monorepo for the Gryt voice chat platform — a self-hostable, WebRTC-based voice communication app with a desktop client, signaling server, SFU, and Keycloak auth.

An open-source AI voice agent platform that turns conversations into 100% accurate, user-verified data via a visual form.

Voice and text chat for communities

Business communication platform