Showing 578 open source projects for "messaging"

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  • 1
    Telegram Desktop

    Telegram Desktop

    Telegram Desktop messaging app

    Telegram Desktop is the official C++/Qt-based cross-platform client for Telegram, implementing the full Telegram API and MTProto protocol for secure messaging, voice/video calls, file sharing, and chat features. It provides message sync across devices, supports themes, stickers, bots, and is actively maintained.
    Downloads: 2,216 This Week
    Last Update:
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  • 2
    LINE Messaging API SDK for Python

    LINE Messaging API SDK for Python

    LINE Messaging API SDK for Python

    The LINE Messaging API SDK for Python makes it easy to develop bots using LINE Messaging API, and you can create a sample bot within minutes. You must upload a rich menu image and link the rich menu to a user for the rich menu to be displayed. You can create up to 1000 rich menus for one LINE Official Account with the Messaging API. The LINE Messaging API SDK for Python includes experimental asyncio support.
    Downloads: 5 This Week
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  • 3
    Sideband

    Sideband

    LXMF client for Android, Linux and macOS to communicate with people

    Sideband is a privacy-focused, peer-to-peer mesh messaging protocol and platform that allows users to communicate directly over local networks or the internet without servers. It emphasizes metadata resistance and secure message delivery, working effectively in offline, low-bandwidth, or disaster recovery scenarios. Built-in Rust, Sideband supports encrypted group messaging, file transfers, and network self-discovery.
    Downloads: 57 This Week
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  • 4
    Fluxer

    Fluxer

    A free and open source instant messaging and VoIP platform

    ...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.
    Downloads: 17 This Week
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  • 5
    Toxic

    Toxic

    A Tox-based instant messaging and video chat client

    Toxic is a Tox protocol-based command-line messenger for Linux, offering fully encrypted, decentralized, and serverless instant messaging. It includes features such as text messaging, file transfer, and audio calls—all without requiring user accounts or central servers. Toxic is designed for power users who prefer a minimalist interface, operating entirely within a terminal while delivering strong privacy through the Tox peer-to-peer protocol. It’s lightweight, fast, and ideal for use in low-resource or remote systems.
    Downloads: 8 This Week
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  • 6
    AyuGram Desktop

    AyuGram Desktop

    Desktop Telegram client with good customization and Ghost mode.

    ...Built as a fork of Telegram Desktop, it extends the core experience with advanced features while staying fast and familiar. AyuGram focuses heavily on privacy tools like ghost mode and anti-recall to give users more control over their messaging behavior. The app offers extensive UI and font customization, allowing users to tailor the interface to their personal style. It also includes convenience features such as built-in translation, enhanced media previews, and streamer-friendly options. Available across Windows, macOS, and Linux, AyuGram Desktop is ideal for power users who want a more flexible Telegram experience.
    Downloads: 201 This Week
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  • 7
    Franz 5

    Franz 5

    Franz is a free messaging app for services like WhatsApp, Slack, etc,

    Franz is your messaging app for WhatsApp, Facebook Messenger, Slack, Telegram and many many more. Franz supports a great variety of business and private messaging & chat services like Slack, WhatsApp, WeChat, Messenger, Telegram, Google Hangouts, Skype, Zendesk and many more. It does not matter if you just want to keep in touch with your friends or are managing a multi-seat customer care team.
    Downloads: 14 This Week
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  • 8
    Tox

    Tox

    A New Kind of Instant Messaging

    ...It also has no central servers that can be raided, shut down, or forced to turn over data. There are no corporate interests, no hidden agendas-- just simple, secure and easy to use messaging.
    Downloads: 11 This Week
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  • 9
    SimpleX

    SimpleX

    The first messaging platform operating without user identifiers

    ...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: 26 This Week
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  • 10
    Cinny

    Cinny

    Yet another matrix client

    ...The client also supports common Matrix features such as spaces, multi-account login, threads, and secure messaging patterns that make it competitive with other decentralized IM platforms.
    Downloads: 21 This Week
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  • 11
    CIM

    CIM

    Distributed instant messaging system for developers

    CIM(CROSS-IM)A developer-oriented system, provides components to help developers build their own distributed instant messaging system that can be a horizontal scaling IM. CIM is an IM Instant messaging system, can be applied as a message push middleware. IOT Message transparent transmission middleware in massive connection scenarios. Provides flexible horizontal expansion and contraction according to the actual situation. The server automatically removes offline clients. ...
    Downloads: 0 This Week
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  • 12
    Session Desktop

    Session Desktop

    A Decentralized, Onion Routed, Private Messenger

    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. ...
    Downloads: 6 This Week
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  • 13
    Dino

    Dino

    Modern XMPP ("Jabber") Chat Client using GTK/Vala

    Dino is a modern, secure, and user-friendly XMPP (Jabber) chat client designed for desktop systems. It aims to provide a polished experience for private and group messaging, with a focus on privacy, end-to-end encryption, and federated communication. Unlike centralized chat platforms, Dino supports standard XMPP servers and integrates features like OMEMO encryption, media sharing, and modern chat UX patterns. It’s written in GTK and optimized for Linux environments, making it a solid choice for privacy-conscious users and open communication advocates.
    Downloads: 2 This Week
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  • 14
    DiscordChatExporter

    DiscordChatExporter

    Saves Discord chat logs to a file

    DiscordChatExporter is a cross-platform utility that allows users to export Discord chat histories into structured files for archival, analysis, or backup purposes. The tool connects to Discord accounts and retrieves message history from servers, channels, or direct messages, then converts the data into formats such as HTML or JSON. It is designed to preserve message structure, timestamps, attachments, and formatting so exported conversations remain easy to navigate and review. The project...
    Downloads: 75 This Week
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  • 15
    Signal Desktop

    Signal Desktop

    Private messenger for Windows, Mac, and Linux

    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.
    Downloads: 28 This Week
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  • 16
    Apache RocketMQ

    Apache RocketMQ

    Distributed messaging and streaming platform with low latency

    Apache RocketMQ is a distributed messaging and streaming platform with low latency, high performance and reliability, trillion-level capacity and flexible scalability. Messaging patterns including publish/subscribe, request/reply and streaming. Financial grade transactional message. Built-in fault tolerance and high availability configuration options base on DLedger. A variety of cross language clients, such as Java, C/C++, Python, Go.
    Downloads: 0 This Week
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  • 17
    SimpleXMQ

    SimpleXMQ

    A reference implementation of the SimpleX Messaging Protocol

    A reference implementation of the SimpleX Messaging Protocol for simplex queues over public networks. SimpleXMQ is a message broker for managing message queues and sending messages over a public network. It consists of an SMP server, SMP client library, and SMP agent that implements SMP protocol for client-server communication and SMP agent protocol to manage duplex connections via simplex queues on multiple SMP servers.
    Downloads: 0 This Week
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  • 18
    OpenWA

    OpenWA

    Free, Open Source, Self-Hosted WhatsApp API Gateway

    OpenWA is a self-hosted WhatsApp API gateway for developers who want control over their messaging infrastructure without depending on a closed vendor platform. It exposes WhatsApp-related actions through HTTP APIs, making it easier to connect messaging features to custom apps, automations, dashboards, and business workflows. The project supports multiple sessions, so one instance can manage more than one WhatsApp account. It also includes a modern web dashboard for managing sessions, webhooks, and API keys visually. ...
    Downloads: 5 This Week
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  • 19
    Nicotine+

    Nicotine+

    Graphical client for the Soulseek peer-to-peer network

    ...Built in Python with a Qt-based GUI, Nicotine+ offers a lightweight yet feature-rich experience for users looking to share and discover files in a decentralized, user-governed environment. It includes search capabilities, bandwidth throttling, chat rooms, and user-to-user messaging, supporting a vibrant community of digital collectors and music lovers.
    Downloads: 24 This Week
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  • 20
    ElasticMQ

    ElasticMQ

    In-memory message queue with an Amazon SQS-compatible interface

    ElasticMQ is a lightweight, fully asynchronous, in-memory message queue implementation written in Scala / Akka. It provides a feature-compatible Amazon SQS REST API interface for testing, local development, or embedded usage. It can persist queues or run purely in-memory and also supports Docker deployment and a web UI.
    Downloads: 9 This Week
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  • 21
    Laravel Telegraph

    Laravel Telegraph

    Telegraph is a Laravel package for fluently interacting with Telegram

    Telegraph is a Laravel package for fluently interacting with Telegram Bots made by def:studio.
    Downloads: 2 This Week
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  • 22
    LocalSend

    LocalSend

    An open-source cross-platform alternative to AirDrop

    LocalSend is a free, open-source app that allows you to securely share files and messages with nearby devices over your local network without needing an internet connection. LocalSend is a cross-platform app that enables secure communication between devices using a REST API and HTTPS encryption. Unlike other messaging apps that rely on external servers, LocalSend doesn't require an internet connection or third-party servers, making it a fast and reliable solution for local communication.
    Downloads: 351 This Week
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  • 23
    xmpp.js

    xmpp.js

    XMPP for JavaScript

    xmpp.js is a JavaScript library for the Extensible Messaging and Presence Protocol (XMPP), facilitating real-time communication features like instant messaging and presence information.
    Downloads: 0 This Week
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  • 24
    Caprine

    Caprine

    Elegant Facebook Messenger desktop app

    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...
    Downloads: 14 This Week
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  • 25
    libsignal

    libsignal

    Home to the Signal Protocol and other cryptographic primitives

    ...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.
    Downloads: 3 This Week
    Last Update:
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