Light QX Protocol is as lightweight E2EE irc-like network for private messaging.

xteam IM - 企业级加密办公聊天软件。支持团队架构、话题驱动、消息同步、音视频通话。多重加密，聊天记录可随时删除。全端支持（PC/Web/Android/iOS），线上成熟运营4-5年。

Layered E2EE group-messaging protocol stack built on MLS (RFC 9420). Includes GBP base layer, GTP/GAP/GSP sub-protocols, SFrame media encryption, and cross-platform bindings for Rust, .NET, Node.js and Python.

A purely Python, End-to-End Encrypted (E2EE) chat system. Features ECDH key exchange, AES-GCM encryption, and forward secrecy.

Self-hosted E2EE messenger stack with web client, API, encrypted chats, groups, files, WebRTC calls and SFU.

A terminal IRC client with E2E encrypted DMs using Signal Protocol

Quasar Secure is a real-time messaging application designed under the principles of Zero Trust.

Artos E2EE Messenger

The self-hosted, decentralized data node for Normsar Sovereign Messaging. Deploy your own Silo to achieve true data sovereignty and connect securely to the Normsar Hub.

ShadowCrypt: E2E Encrypted Messaging Platform with Zero-Knowledge Relays.

A sovereign, zero-knowledge private communication platform for couples. Features Signal-grade E2EE, WebRTC calls, and a self-hosted backend.

Signal protocol for Expo / React Native