Open Source TypeScript Messaging Platforms

Telegram Web A is a full‐featured web client implementation for Telegram, built from scratch as a lightweight, modern single-page application. It uses a custom front-end framework (called “Teact”) that re-implements React-style paradigms and pairs them with a custom version of the MTProto library (based on GramJS) to interact with Telegram’s backend infrastructure. The project achieved recognition (winning first prize in the Telegram Lightweight Client Contest) and serves as the code base behind the official web client available at web.telegram.org/a. The architecture takes advantage of advanced browser capabilities: WebSockets for real-time messaging, Web Workers and WebAssembly for performance-critical tasks, multi-level caching and PWA features for offline or near-offline usability, voice recording and media streaming, raw binary data handling and cryptographic operations. It also handles rich UI/UX elements such as CSS/Canvas/SVG animations, reactive data streams, etc.

Session Desktop is an open-source, privacy-focused messaging application that brings secure, decentralized communication to desktop environments such as Windows, macOS, and Linux, providing users with encrypted text, media, and group chats without requiring phone numbers or email addresses. Built on the Session protocol and the Loki network, it routes messages through a distributed onion-routing network that hides metadata like sender, timing, and location so that conversations are resistant to surveillance and correlation attacks. The desktop client pairs seamlessly with Session mobile apps but can also be used independently to communicate with Session contacts in a familiar desktop interface that supports a full keyboard, global notifications, drag-and-drop media sharing, and local file access. Session emphasizes zero-knowledge privacy, meaning that only the participants in a conversation can read the messages.

Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect. State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. We can't read your messages or listen to your calls, and no one else can either. Privacy isn’t an optional mode, it’s just the way that Signal works. Every message, every call, every time. Share text, voice messages, photos, videos, GIFs and files for free. Signal uses your phone's data connection so you can avoid SMS and MMS fees. Make crystal-clear voice and video calls to people who live across town, or across the ocean, with no long-distance charges. Add a new layer of expression to your conversations with encrypted stickers. You can also create and share your own sticker packs. Group chats make it easy to stay connected to your family, friends, and coworkers.

Fluxer is a free and open-source instant messaging and VoIP platform designed to provide communities, friend groups, and teams with a self-hostable communication alternative. The project combines real-time chat, voice calling, and community features into a unified system that can be deployed independently rather than relying on centralized proprietary services. It is built with a modern TypeScript stack and focuses on delivering a clean user experience alongside flexible infrastructure options for developers who want control over their communication environment. Fluxer supports typical messaging workflows while also aiming to provide extensibility for plugins and future integrations. Because it is open source, users can inspect, modify, and host their own instance, aligning with privacy-focused and decentralized communication trends.

Caprine is an unofficial and privacy-focused Facebook Messenger app with many useful features. Caprine is feature complete. However, we welcome contributions for improvements and bug fixes. Dark theme, Vibrant theme, privacy-focused, keyboard shortcuts, menu bar mode, work chat support, code blocks, touch bar support, and custom styles. macOS 10.10+, Linux, and Windows 7+ are supported (64-bit only). For taskbar notification badges to work on Windows 10, you'll need to enable them in Taskbar Settings. Convert your messenger to a dark theme. Ability to toggle last seen/typing indicators. Interface adapts to smaller sizes. In-house notifications to keep you up to date. Caprine is a third-party app and is not affiliated with Facebook. You can toggle dark mode in the View menu or with Command d / Control d.

Instagram: the app you open to send one message… and suddenly 30 minutes are gone. We all know the cycle — and we finally had enough. What if Instagram had a quick fix? A productivity-friendly mode that keeps your connections, but gives your attention span a fighting chance? No algorithm traps. No reel vortex. No dopamine casino. Just conversations and updates, on your terms. Instagram CLI is a minimal, fast, keyboard-native way to stay connected without getting cooked by social media.

Chaskiq's plugin architecture allows for a variety of conversational experiences to take them to the next level. For example: Schedule meetings with Calendly, provide means of payment directly from the webchat, initiate video calls via Zoom, integrate your shopping carts or trigger subsequent actions via Zapier. In short, create experiences that create value for your customers. There are no limits! One of the most robust webchats that allows extending its functionalities by integrating multiple plugins which allow taking conversations to the next level. We have developed a text editor that allows us to send messages worthy of the year 2022, this means going beyond markdown format and taking messaging to the extreme. Gifs, Videos, Embeds and a long etcetera. Chaskiq is an open source platform that connects and empowers the communication of support, sales & marketing teams with their customers.

Discord Ollama Integration is a TypeScript-based Discord bot that integrates directly with the Ollama runtime to provide conversational AI capabilities inside Discord servers. The project is designed to turn any Discord channel into an interactive AI assistant powered by locally hosted large language models, allowing users to chat, manage models, and control AI behavior through slash commands. It includes extensive command support for tasks such as summarization, model switching, listing available models, and pulling new models from the Ollama library. The system is built with multi-user support in mind, enabling simultaneous conversations while maintaining contextual awareness at the channel and user level. It also handles long outputs by splitting responses beyond Discord’s message limits, ensuring smooth interaction even with large generated responses. The project supports Docker-based deployment, making it easy to run both the bot and Ollama server in a containerized environment.

Messaging APIs is a mono repo that collects APIs needed for bot development. It helps you build your bots using a similar API for multiple platforms, e.g. Messenger, LINE. Learn once and make writing cross-platform bots easier. If you are looking for a framework to build your bots, Bottender may suit for your needs. It is built on top of Messaging APIs and provides some powerful features for bot building.