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

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  • 1
    Tox

    Tox

    A New Kind of Instant Messaging

    Tox is a peer to peer (serverless) instant messenger that focuses on security and privacy. In today's world where digital surveillance is rampant, Tox offers users a communication software alternative that's free from prying eyes and ears, and is, quite literally free and without advertising. Tox comes with all the great features you'd expect from an instant messenger application, including voice calls, video calls, file sharing and screen sharing. Everything done on Tox is encrypted using open-source libraries so you can be assured of completely private conversations. 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: 27 This Week
    Last Update:
    See Project
  • 2
    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: 17 This Week
    Last Update:
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  • 3
    Tinode Instant Messaging Server

    Tinode Instant Messaging Server

    Instant messaging platform

    Instant messaging server. Backend in pure Go (license GPL 3.0), client-side binding in Java, Javascript, and Swift, as well as gRPC client support for C++, C#, Go, Java, Node, PHP, Python, Ruby, Objective-C, etc. (license Apache 2.0). Wire transport is JSON over websocket (long polling is also available) for custom bindings, or protobuf with gRPC. Persistent storage is any one of RethinkDB, MySQL or MongoDB. A third-party unsupported DynamoDB adapter also exists. Other databases can be supported by writing custom adapters. Tinode is not XMPP/Jabber. It is not compatible with XMPP. It's meant as a replacement for XMPP. On the surface, it's a lot like open source WhatsApp or Telegram. Version 0.17. This is beta-quality software, feature-complete and stable but probably with a few bugs. Follow instructions to install and run or use one of the cloud services provided.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4
    Discussion Forum Software For Intranets

    Discussion Forum Software For Intranets

    The Free & Popular FLARUM Web Software in a Complete Virtual Machine

    This VM is created for 2 reasons: 1. Very little initial setup work required to make a Forum live, within minutes. 2. This system should keep running for Years, without requiring Updates / Breakages. If you are new to Virtual Machines, then please watch the Video below ( taken from my other project. just replace td with fm wherever mentioned ) After starting this VM, please login to its administration panel with: Website Address: https://fm.local/public/ ( Accept Any Warnings ) Admin Username: admin Admin Password: change_this from any PC on your Local Network. Then setup your "SMTP Server" details from the Email option. This will help in flow of all emails from the system. Then setup up your Users Accounts. All other features can be explored at your leisure. Once setup & running, please ensure that a Backup of the system, is taken regularly, to avoid any issues. These are covered in the video. Google Search helps in finding more about flarum.
    Downloads: 4 This Week
    Last Update:
    See Project
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  • 5
    ChatSecure

    ChatSecure

    ChatSecure is a free and open source encrypted chat client for iOS

    ChatSecure is a free and open source messaging app that features OMEMO encryption and OTR encryption over XMPP. You can connect to your existing Google accounts or create new accounts on public XMPP servers (including via Tor), or even connect to your own server for extra security. Unlike other apps that keep you stuck in their walled garden, ChatSecure is fully interoperable with other clients that support OMEMO or OTR and XMPP, such as Conversations (Android), CoyIM (Desktop), and more. ChatSecure only uses well-known open-source cryptographic libraries to keep your conversations private. Other apps may make claims about "military grade" security but, without publicly auditable source code and verifiable end-to-end encryption, you cannot be truly safe.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6

    Samsunir

    Samsunir توسعه دهنده

    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Session for iOS

    Session for iOS

    A Decentralized, Onion Routed, Private Messenger

    Session iOS is the native iPhone and iPad client for the Session secure messaging ecosystem, engineered to bring private, anonymous communication to Apple’s mobile platforms without relying on phone numbers or email addresses. The app supports encrypted one-on-one and group chats, voice messages, file and image sharing, and threaded conversations, all delivered over a decentralized onion network designed to conceal metadata such as sender identity, message timing, and network path. On iOS, Session integrates with Apple’s notification and background execution frameworks so that messages arrive reliably while preserving privacy protections, and it supports Face ID/Touch ID unlock to guard access to local message storage. Its interface follows iOS conventions for navigation, attachments, and user interaction, making secure messaging feel natural to Apple users while maintaining rigorous cryptographic standards.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    WinT Messenger

    WinT Messenger

    Simple and lightweight IM client

    WinT Messenger is a practical instant messaging application that its developed by a small team of students working in the WinT 3794 team. The application is written in QML/C++ and can be used with the most popular desktop and mobile operating systems.
    Downloads: 0 This Week
    Last Update:
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  • 9
    rabbitim

    rabbitim

    rabbit instant messaging

    玉兔即时通信。开源的跨平台的的即时通信系统。包括文本、音视频、白板、远程控制
    Downloads: 0 This Week
    Last Update:
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