Open Source Rust Chat Software

Dorion is an alternative Discord client aimed and lower-spec or storage-sensitive PCs that supports themes, plugins, and more! Built with Rust on top of the Tauri library, Dorion uses your systems integrated Webview implementation. This means Dorion has a tiny installation size (~10mb) and works portably on Windows 11 and newer versions of Windows 10. Don't worry, you can still use it on Windows 7 too!

Halloy is an open-source IRC client written in Rust, utilizing the Iced GUI library. It aims to provide a simple and fast client for Mac, Windows, and Linux platforms

libsignal is the foundational cryptographic library that implements the Signal Protocol and other essential primitives used across the official Signal clients and servers, enabling secure end-to-end encrypted communication. Written primarily in Rust with bindings and APIs surfaced for Java, Swift, and TypeScript, this library encapsulates critical algorithms like the Double Ratchet, prekey mechanisms, secure key storage, and zero-knowledge group primitives, along with additional utilities for media handling and device key transfer. libsignal abstracts complex cryptographic constructions into reusable components that client applications can adopt to ensure forward secrecy, authentication, and integrity without re-implementing core security logic. Although its primary use is within the Signal ecosystem, its documentation and exposed interfaces allow developers to explore modern secure messaging primitives or use pieces of the protocol in experimental applications.

Stoat is an open-source communication platform and ecosystem designed to provide a modern alternative to traditional chat applications with support for self-hosting and extensibility. The project includes multiple components such as backend services, client applications, and supporting infrastructure, forming a complete messaging system that can be deployed across different environments. The repository for stoat.chat specifically serves as a central web hub that provides access to downloads, documentation, and information about the platform. StoatChat is built with modern technologies such as Rust and TypeScript and integrates with systems like Revolt to deliver real-time messaging capabilities. The platform supports multiple clients including web, desktop, and mobile applications, allowing users to interact across devices seamlessly. It also emphasizes developer flexibility by offering APIs and SDKs that enable integration with custom tools and services.

Serenity is a Rust library for building Discord bots and integrations through Discord’s official API. It wraps Discord’s HTTP and gateway systems so developers can handle messages, events, commands, cache data, and bot sessions from Rust. The library provides a client builder, token validation, event dispatching, context objects, and handlers for reacting to Discord activity. It also manages gateway shards transparently, which reduces the complexity of scaling bot connections. Serenity includes examples for common bot behaviors and can be paired with related Rust projects such as poise for command frameworks and songbird for voice. It is best suited for developers who want Discord API access with Rust’s safety, performance, and async ecosystem.