Dec 31, 2025 · go chat golang open-source server messaging messenger free-software instant-messaging im chat-server chat-application chatapp messaging-service Updated on Nov 2, 2025 Go

Signal - Making private communication simple. Encrypted chat, audio and videocalls. Linphone - Linphone is an open source instant messaging and voice/video over IP (VoIP) phone that makes it …

One messenger for Internet and LAN chat with end-to-end encryption Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end …

Unlike standalone chat applications such as Telegram, Signal, and Rocket.Chat, OpenIM offers an open-source instant messaging solution designed specifically for developers rather than as a directly …

Instant messengers are still a bunch of incompatible walled gardens, similar to what AoL of the late 1990s was to the open Internet. The goal of this project is to deliver on XMPP's original vision: create …

Turms is the most advanced open-source instant messaging engine for 100K~10M concurrent users in the world. Please refer to Turms Documentation for details.

Open OSCAR Server is an open-source instant messaging server compatible with classic AIM and ICQ clients.

The ultimate secure open-source solution for team communications Rocket.Chat is an open-source, secure, fully customizable communications platform developed in TypeScript for organizations with …

Franz is a free messaging app for services like WhatsApp, Slack, Messenger and many more. - meetfranz/franz

Paizer - Open source instant messaging 🚀 introduce Welcome to Paizer, a community-driven instant messaging tool designed to provide a secure, efficient, and easy-to-use communication platform. …