Browse free open source Chat software and projects below. Use the toggles on the left to filter open source Chat software by OS, license, language, programming language, and project status.

  • Ingest Package Label Data Using OCR Software Icon
    Ingest Package Label Data Using OCR Software

    PackageX OCR API converts any smartphone into a powerful universal label scanner that reads every bit of text on the label, including barcodes and QR

    Our state-of-the-art OCR technology uses robust deep learning models and proprietary algorithms to extract information from package labels.
  • Model-Based Systems Engineering Software Icon
    Model-Based Systems Engineering Software

    Systems requirements, Modeling and Simulation, Verification and Validation in one seamless solution.

    SPEC Innovations’ flagship model-based systems engineering solution can help your team reduce time-to-market, cost, and risk on even some of the most complex systems. This cloud or on-premise application uses a modern web browser, with an intuitive graphical user interface.
  • 1
    LAN Messenger

    LAN Messenger

    An intranet chat application that does not require a server.

    LAN Messenger is a p2p chat application for intranet communication and does not require a server. A variety of handy features are supported including notifications, personal and group messaging with encryption, file transfer and message logging.
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    Downloads: 4,952 This Week
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  • 2
    FetLife for Android

    FetLife for Android

    The FetLife App on Android

    This is the FetLife open source application made for Android. FetLife is the app for Kinksters who want to chat with fellow Kinksters, find out where the nearest FetLife events are happening, view other members’ profiles, and many other kinky things. With FetLife on Android, it’s easier than ever to access all the things you love about FetLife. Get notified on your Android phone so you stay on top of conversations and discussions, and discover the latest events on the app’s map. Want to be discreet? No problem, as the FetLife app comes with discreet mode so you can use the app freely without worries.
    Downloads: 163 This Week
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  • 3
    BeeBEEP (Free Office Messenger)

    BeeBEEP (Free Office Messenger)

    You can message and share files inside your intranet without a server.

    BeeBEEP is a secure (encryption based on Rijndael Algorithm, AES) peer to peer office messenger. You can talk and send files with all your colleagues inside a local area network such of an office, home or internet cafe without a server. BeeBEEP works also with VPNs. This serverless application is indispensable in all those places where privacy and security an essential requirement. For more info visit: https://www.beebeep.net
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    Downloads: 2,217 This Week
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  • 4
    Pidgin IM

    Pidgin IM

    A universal instant messaging (IM) program

    See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.
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    Downloads: 9,410 This Week
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  • Enterprise Cloud Faxing at a Small Business Price Icon
    Enterprise Cloud Faxing at a Small Business Price

    eGoldFax ensures effortless fax communication.

    eGoldFax revolutionizes faxing by eliminating the need for a traditional phone line, offering a convenient and versatile solution for sending and receiving faxes.
  • 5
    ZaDark – Zalo Dark Mode

    ZaDark – Zalo Dark Mode

    Dark Mode tốt nhất cho Zalo

    ZaDark là tiện ích giúp kích hoạt Dark Mode cho Zalo PC và Web. [Điểm nổi bật] - Màu sắc đẹp, độ tương phản tốt - Tuỳ chỉnh giao diện trực tiếp trên Zalo Web : Sáng, Tối hoặc Theo hệ thống - Tuỳ chỉnh phông chữ, cỡ chữ - Chống nhìn trộm tin nhắn - Ẩn trạng thái : Đang soạn tin (Typing), Đã nhận (Received) và Đã xem (Seen) - Đa nền tảng : Windows, macOS, Chrome, Safari, Opera, Edge và Firefox - Mã nguồn mở : https://go.quaric.com/zadark-github [Ghi chú] - ZaDark là sản phẩm từ Quaric, không phải sản phẩm từ Zalo Group - ZaDark không thay đổi bất cứ dữ liệu nào liên quan tài khoản Zalo của bạn - ZaDark chưa bao giờ thu thập và sẽ không bao giờ thu thập bất kỳ dữ liệu cá nhân nào như lịch sử duyệt web, mật khẩu,... --- ZaDark by Quaric Website: https://zadark.com
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    Downloads: 1,440 This Week
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  • 6
    DC++

    DC++

    A Windows client for the Direct Connect networks

    DC++ is an open source Windows client for the Direct Connect file sharing network. The DC network is a decentralized network, made up of individual servers (hubs) that users join to share files with other members on that hub. Each hub is individually run by a fellow user of the DC network, and may have certain themes to the content on the hub. Hub owners set up rules to regulate their hub as they see fit.
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    Downloads: 1,246 This Week
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  • 7
    Mattermost Desktop

    Mattermost Desktop

    Mattermost Desktop application for Windows, Mac and Linux

    Mattermost Desktop is a native desktop application for Mattermost, a workplace messaging alternative to Slack. Mattermost Desktop is developed using Electron and runs on Windows, Mac and Linux.
    Downloads: 43 This Week
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  • 8
    Botpress

    Botpress

    Dev tools to reliably understand text and automate conversations

    We make building chatbots much easier for developers. We have put together the boilerplate code and infrastructure you need to get a chatbot up and running. We propose you a complete dev-friendly platform that ships with all the tools you need to build, deploy and manage production-grade chatbots in record time. Built-in Natural Language Processing tasks such as intent recognition, spell checking, entity extraction, and slot tagging (and many others). A visual conversation studio to design multi-turn conversations and workflows. An emulator & a debugger to simulate conversations and debug your chatbot. Support for popular messaging channels like Slack, Telegram, MS Teams, Facebook Messenger, and an embeddable web chat. An SDK and code editor to extend the capabilities. Post-deployment tools like analytics dashboards, human handoff and more.
    Downloads: 34 This Week
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  • 9
    gSOAP Toolkit

    gSOAP Toolkit

    Development toolkit for Web Services and XML data bindings for C & C++

    The gSOAP toolkit is an extensive suite of portable C and C++ software to develop XML Web services with powerful type-safe XML data bindings. Easy-to-use code-generator tools allow you to directly integrate XML data in C and C++. Serializes native application data in XML. Includes WSDL/XSD schema binding and auto-coding tools, stub/skeleton compiler, Web server integration with Apache module and IIS extension, high-performance XML processing with schema validation, fast MIME/MTOM streaming, SOAP and REST Web API development, WS-* protocols (WS-Security, WS-Policy, WS-ReliableMessaging, etc), XML-RPC and JSON. Licensed under GPLv2. Visit the developer center with guides, tutorials, and examples at www.genivia.com/dev.html The documentation of the toolkit, libraries, plugins and more is available at www.genivia.com/docs.html Commercial-use licenses and expert technical support services are available at competitive pricing levels, please visit www.genivia.com/products.html
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    Downloads: 647 This Week
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  • Effortlessly Manage Product Information Icon
    Effortlessly Manage Product Information

    OneTimePIM is a comprehensive Product Information Management System designed to streamline the import and distribution of product data.

    A single source of truth for all of your product information with easy ways to distribute that data to wherever it needs to go, including the most powerful e-commerce connectors in the industry.
  • 10
    Dorion

    Dorion

    Tiny alternative Discord client with a smaller footprint and support

    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!
    Downloads: 26 This Week
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  • 11
    Element

    Element

    A glossy Matrix collaboration client for the web

    Element, formerly known as Vector and Riot, is a glossy Matrix collaboration client built using the Matrix React SDK. It offers teams, friends and organizations a secure, all in one chat app that is protected from pesky ads and data mining methods. All communications are done through the open global Matrix network, secured with end-to-end encryption. Element gives you all the services you need from a chat app: group chat, video calls, file sharing and more-- all done securely and in total privacy. Element has three different tiers of support for different environments, the most supported being the latest versions of Chrome, Firefox, and Safari on desktop OSes.
    Downloads: 21 This Week
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  • 12
    whatsapp-web.js

    whatsapp-web.js

    WhatsApp library for NodeJS that connects through the browser app

    A WhatsApp client library for NodeJS that connects through the WhatsApp Web browser app. Programmatically control WhatsApp whether you're running user or business accounts. It uses Puppeteer to run a real instance of Whatsapp Web to avoid getting blocked. Programmatically control WhatsApp whether you're running user or business accounts. Whatsapp-web.js connects to an official version of WhatsApp Web under the hood, reducing ban risks. The object-oriented approach makes it easy to get running quickly. Since whatsapp-web.js works by running WhatsApp Web in the background and automating its interaction, you'll need to authorize the client by scanning a QR code from WhatsApp on your phone. After scanning this QR code, the client should be authorized and you should see a Client is ready! message being printed out.
    Downloads: 19 This Week
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  • 13
    Psi

    Psi

    Psi IM — Qt-based XMPP client

    Psi is cross-platform powerful XMPP client designed for experienced users. There are builds available for MS Windows, GNU/Linux and macOS.
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    Downloads: 407 This Week
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  • 14
    Psi+

    Psi+

    Psi+ Project — development branch of Psi XMPP client

    Psi is a cross-platform powerful XMPP client designed for experienced users. Psi+ is a development branch of Psi XMPP client. Project purpose: collection, refinement and writing new patches for transfer them to Psi upstream developers.
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    Downloads: 693 This Week
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  • 15
    Unofficial Discord 3DS Client

    Unofficial Discord 3DS Client

    A simple unofficial Discord client to use as an example

    This just a simple Discord client for the 3DS build using the Sleepy Discord library and the Wslay library. Also please, notice that this is not an official Discord client, and is not made by the Discord staff. I noticed that a few Discord clients for consoles were using the Discord API incorrectly causing huge issues for those clients. So, I decided to make this as an example of how I think it should have been done. First, you need a token to an account that you own, because Discord doesn't want people asking for passwords. Anyway, place this into a file called discord token.txt in the root of your sd card.
    Downloads: 13 This Week
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  • 16
    gtkcord

    gtkcord

    A Gtk3 Discord client in Golang

    A lightweight Discord client which uses GTK3 for the user interface. Because the official client is lagging too hard for me to ignore. gtkcord3 won't be receiving any new features. It is being maintained at a minimal level just to ensure that it's usable on my computer. Crashed will still be fixed as I use the application, but that's about it.
    Downloads: 13 This Week
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  • 17
    GDevelop

    GDevelop

    The game engine for everyone

    GDevelop is an open-source, cross-platform game development software designed to make creating HTML5 and native games easy for everyone. Experts and novices alike can create their own games with GDevelop as it is fast and easy to learn, requiring no knowledge in a specific programming language. What makes GDevelop unique and so easy to use is its powerful and intuitive event-based system. Events are a powerful way to build up your game logic, without having to learn a programming language. GDevelop also features ready-made behaviors for your game objects, and allows you to create new behaviors through the easy to learn events. And when you're done, you can publish your game just about anywhere-- web, iOS, Android, Windows, Mac, Linux and even Facebook Messenger. Making games has never been easier or faster than with GDevelop!
    Downloads: 12 This Week
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  • 18
    GoofCord

    GoofCord

    Take control of your Discord experience with GoofCord

    Take control of your Discord experience with GoofCord, the highly configurable and privacy-focused Discord client. Privacy first: GoofCord blocks all tracking and uses multiple techniques to improve your privacy and security. Tailor your client to your liking with GoofCord's plethora of configuration options. Enjoy a smooth and lag-free chatting experience with GoofCord's superior speed and responsiveness. GoofCord is built as a standalone client and doesn't rely on the original Discord client in any way. GoofCord supports other client mods such as Vencord or Shelter which allows you to use plugins and themes.
    Downloads: 12 This Week
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  • 19
    Signal iOS

    Signal iOS

    A private messenger for iOS

    Signal is a free, open source, messaging app for simple private communication with friends. Say "hello" to a different way of chatting: Signal is all about privacy, but with all the features you expect from a chat app. State-of-the-art end-to-end encryption (backed by Signal's open source protocol) keeps your chats safe. Neither we can read your messages or listen to your calls, nor anyone else. Privacy is not an optional mode, it is how Signal works. In all your messages, all your calls, forever. Send and receive messages, voice memos, photos, videos, GIFs and files for free. Signal uses your phone's data connection so no SMS or MMS charges are incurred. Make crystal clear calls 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 chats with encrypted trading cards. You can also create and share your own sticker packs.
    Downloads: 11 This Week
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  • 20
    ApexDC++

    ApexDC++

    The pinnacle of file-sharing and chat - an innovative DC client!

    ApexDC™ is an innovative Direct Connect client based on the DC++ and StrongDC++ projects. Direct Connect provides a rare blend of seamless file sharing and community based chat and messaging between users. ApexDC features plugins and scripting through Lua and much more. Both operators and users alike should find it a pleasant experience. Note: as of May 28th 2016 ApexDC is now primarily distributed as two separate installers one targetting 32bit and the other 64bit operating systems. Additionally XP compatible binaries are now only offered as a separate download from the files section.
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    Downloads: 226 This Week
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  • 21
    Abaddon

    Abaddon

    An alternative Discord client with voice support made with C++ and GTK

    Alternative Discord client made in C++ with GTK. Abaddon tries its best (though is not perfect) to make Discord think it's a legitimate web client. Some of the things done to do this include: using a browser user agent, sending the same IDENTIFY message that the official web client does, using API v9 endpoints in all cases, and not using endpoints the web client does not normally use. There are still a few smaller inconsistencies, however. For example the web client sends lots of telemetry via the /science endpoint (uBlock origin stops this) as well as in the headers of all requests. Discord likes disabling accounts/forcing them to reset their passwords if they think the user is a spam bot or potentially had their account compromised. While the official client still often gets users caught in the spam filter, third party clients tend to upset the spam filter more often. If you get caught by it, you can usually appeal it and get it restored.
    Downloads: 10 This Week
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  • 22
    Botkit

    Botkit

    Tool for building chat bots, apps and custom integrations

    An open source developer tool for building chat bots, apps and custom integrations for major messaging platforms. Part of the Microsoft Bot Framework. We love bots, and want to make them easy and fun to build! Include Botkit into your Node application and boot up a controller that will define your bot's behaviors. In this case, we're setting up a bot to use with the Bot Framework Emulator. Tell the bot to listen for users saying "hello," and use `bot.reply` to send an immediate response. Start a conversation, then queue up multiple messages to send, including a prompt sent using `convo.ask()` which allows your bot to capture user input and use it. Botkit is just one part of a bigger set of developer tools and SDKs that encompass the Microsoft Bot Framework. The Bot Framework SDK provides the base upon which Botkit is built. It is available in multiple programming languages!
    Downloads: 10 This Week
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  • 23
    SimpleX

    SimpleX

    The first messaging platform operating without user identifiers

    Other apps have user IDs: Signal, Matrix, Session, Briar, Jami, Cwtch, etc. SimpleX does not, not even random numbers. This radically improves your privacy. The video shows how you connect to your friend via their 1-time QR-code, in person or via a video link. You can also connect by sharing an invitation link. Temporary anonymous pairwise identifiers SimpleX uses temporary anonymous pairwise addresses and credentials for each user contact or group member. It allows to deliver messages without user profile identifiers, providing better meta-data privacy than alternatives. Many communication platforms are vulnerable to MITM attacks by servers or network providers. To prevent it SimpleX apps pass one-time keys out-of-band when you share an address as a link or a QR code. Double-ratchet protocol. OTR messaging with perfect forward secrecy and break-in recovery. NaCL cryptobox in each queue to prevent traffic correlation between message queues if TLS is compromised.
    Downloads: 10 This Week
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  • 24
    ssh-chat

    ssh-chat

    Chat over SSH

    ssh-chat is a custom SSH server written in Go that allows you to chat over SSH connection. When you open your terminal and type in a command, instead of getting a shell you get a chat prompt. With ssh-chat you get a simple chat room over a secure shell connection, where you can send and receive private messages, check any user's public key fingerprint for identification purposes, and more. You can change the color theme of the chat, block or kick users, and chat on just about any platform where an SSH client is available, including on mobile.
    Downloads: 10 This Week
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  • 25
    StrongDC++
    This project allows connecting, file sharing and chatting in Direct Connect and ADC networks.
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    Downloads: 322 This Week
    Last Update:
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