Open-source communication apps
Messaging apps, email, newsletters, and social media tools for keeping in touch.
Last updated Oct 20, 2026
22 projects
2.8k
- 3.9k
Cinny
Clean, simple web client for chatting on the Matrix network
- 4.8k
Macro
Team workspace combining email, chat, docs, tasks, CRM and AI agents
- 5.8k
FxEmbed
Rich link previews for X/Twitter and Bluesky posts in chat apps
8.5kMeshtastic
Firmware for small LoRa radios that pass text messages with no cell service
- 7.8k
bitchat for Android
Offline Bluetooth mesh messenger for Android with Nostr fallback
11.4k
- Dream Hunter12k
Cloudflare Temp Email
Disposable email service you deploy on your own Cloudflare account
- Alleria15.7k
Social-Auto-Upload
Command-line uploader that posts videos to Douyin, Bilibili, TikTok and more
- Yudhi Armyndharis15.9k
OpenWA
Self-hosted REST API gateway for sending and receiving WhatsApp messages
- 19.6k
SimpleX Chat
Private messenger with no user IDs, phone numbers, or usernames
- 22.8k
whatsapp-web.js
Node.js library for automating WhatsApp through its web client
- Kailash Nadh23.9k
listmonk
Run your own newsletters and mailing lists from a single binary
- 26.7k
AiToEarn
AI agent platform for creating and cross-posting social media content
33.3k
Philipp C. Heckel34.9kntfy
Send push notifications to your phone or desktop with a simple HTTP request
CommunicationSelf-hosted alternativesServers and infrastructure
- 55.6k
Ghost
Publishing platform for blogs, paid memberships, and newsletters
- sansan63k
TrendRadar
Trending-news aggregator with keyword filters, AI summaries and push alerts
- 36.2k
Buzz by Block Open Source
Self-hosted team workspace where people and AI agents share channels
CommunicationAgent frameworks and toolsSelf-hosted alternatives
- 36.7k
bitchat
Offline Bluetooth mesh chat with Nostr fallback for internet reach
- pppscn28.5k
SmsForwarder
Android app that forwards SMS, calls, and notifications by rule
- FujiwaraChoki32.2k
MoneyPrinterV2
Python CLI that automates Twitter posts, YouTube Shorts, and outreach