instant-messaging

Edgechat

+63

完全运行于 Cloudflare Worker的现代聊天系统：实时通信、Telegram 双向桥接、消息与文件加密 A modern, self-hosted team chat built on Cloudflare — realtime messaging, Telegram bridge, encrypted messages & files, and WebMCP. |

tinode/chat

+13

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

im-server

+5

IM Chat, High-performance, scalable, self-hosted instant messaging server in Go — private chat, groups, chatrooms, WebSocket and REST APIs.

TIMSDK

+3

Free Chat SDK (IM SDK) — 1,000 MAU/month free forever with push notifications & no concurrency limits. Build in-app messaging with chat API, UIKit & send message. Supports Android, iOS, Flutter, Web, React Native, uni-app, HarmonyOS & more.

movim/movim

+2

Movim - Decentralized social platform

deltachat-desktop

+2

Decentralized private messenger with chat-shared tools and games for Desktop

fonoster/routr

+2

⚡ The future of programmable SIP servers.

open-oscar-server

+2

Self-hostable instant messaging server compatible with classic AIM and ICQ clients written in golang. (Independently developed, not affiliated with or endorsed by AOL)

octo-server

+1

🐙 The Go backend powering OCTO — an open workplace built for humans × AI agents. REST & WebSocket APIs, Lobster (AI agent) orchestration, and WuKongIM real-time messaging control plane.