Communication

58 apps

Communication is one of the strongest sections for real, daily-use apps. SimpleX Chat, Signal and Telegram all publish their iOS source, as do the encrypted email clients Tutanota and Proton Mail. Element and FluffyChat are Matrix clients, Monal speaks XMPP, and Zulip, Mattermost and Rocket.Chat cover team chat. Thunderbird's iOS email client is listed too.

Many of these use GPL or AGPL licenses, which require you to publish changes if you distribute a modified app. The codebases are large and security focused, so they are good for studying end-to-end encryption, push handling and offline sync, but hard to fork lightly. Smaller projects such as Messenger Clone and AppRTC are better starting points if you want to learn real-time chat or WebRTC video calling.

afone44SwiftMITReference implementation for SIP Telephony that can be used on different SIP stacks with no effortApp Store 5 shotsupdated 6y agoApple Intelligence Chat400SwiftUIMITChat with Apple Intelligence using the new Foundation Models Framework and Liquid Glass UI1 shotupdated 1y agoAppRTC1.3kObjective-CBSD-3-ClauseA native video chat app1 shotupdated 6y agoBasic Chat (Bluetooth Low Energy)126SwiftMITbluetoothupdated 5y agoBetterBlue133SwiftUIMITSeamlessly connect and control your Hyundai or Kia vehicles1 shotupdated 5d agoChatSecure3.2kObjective-CGPL-3.0Send messages with OTR encryptionApp Store 4 shotsupdated 2y agoChatwoot1.1kReact NativeMITLive chat for businessesApp Store 1 shotupdated todayColloquy261Objective-CIRC clientApp Store 4 shotsupdated 5y agoContext Composer5SwiftApache-2.0Context Composer is a cutting-edge app that leverages Apple's Foundation Models framework to generate contextually appropriate response variations.1 shotupdated 11mo agodeltachat452SwiftEmail-based instant messagingApp Store iPad2 shotsupdated todayElement1.8kSwiftApache-2.0Secure decentralised chat/VoIPApp Store iPad1 shotupdated 21d agoFlash Chat68Swiftupdated 2y agoFlat59SwiftMITAgora Flat classroom1 shotupdated 10mo agoFluffyChat3.2kFlutterAGPL-3.0Cute matrix messenger, easy to use but secure and decentralizedApp Store iPadupdated todayFoundationChat348SwiftUIMITChat using iOS 26 Foundation Models1 shotupdated 1y agoGoguma IRCFlutterAGPL-3.0Modern IRC experience with support for many IRCv3 extensions and IRC bouncersApp Store 1 shotIRCCloud300Objective-CApache-2.0IRC client/serviceApp Store 4 shotsupdated 22d agoJamiSwiftMITDecentralised text messaging, video and audio calls, file transfer, video conferencingApp Store 1 shotLinphoneObjective-CGPL-2.0Free audio/video calls and text messaging (be reachable at any time, even if the app is closed, with a WiFi or cellular connection)App Store 4 shotsMattermost2.7kReact NativeApache-2.0Secure messaging platform for DevOps teamsApp Store 4 shotsupdated todayMessenger4.8kSwiftAudio/video calls, realtime chat & full offline support1 shotupdated 1mo agoMessenger Clone790SwiftMITReal-time chat1 shotupdated 10mo agoMonal680Objective-CConnect to your chat server without having to give a third party access to your password or messagesApp Store 3 shotsupdated todayMumble228Objective-CBSD-3-ClauseGaming-focused social voice chat utilityApp Store 4 shotsupdated 1mo agoNio Matrix client557SwiftMIT1 shotupdated 8mo agoProtonMail1.6kSwiftGPL-3.0Encrypted EmailApp Store iPad4 shotsupdated 5mo agoReal-time Chatfirebase1 shotScowld29SwiftUIMITAI voice companion with animated characters, voice and text chat, local conversation history, optional camera context, and bring-your-own AI and speech providersApp Store iPad1 shotupdated todaySignal12.3kObjective-CGPL-3.0Free, world-wide, private messaging & phone callsApp Store 4 shotsupdated 1d agoSimpleX Chat19.6kSwiftAGPL-3.0Privacy redefined (no user IDs)App Store 1 shotupdated todaySwiftgram596SwiftGPL-2.0Supercharged Telegram experience. Feature-rich, unlocked and secure fork with 50+ settings.App Store 4 shotsupdated 1mo agoTelegram9.2kSwiftGPL-2.0Send messages with a focus on speed & securityApp Store 5 shotsupdated 7d agoThreema420SwiftAGPL-3.0Secure, Anonymous and Private MessengerApp Store 4 shotsupdated 4d agoThunderbird Email1.2kSwiftUIMPL-2.01 shotupdated todayTinode292SwiftApache-2.0Cross platform messengerApp Store 1 shotupdated 27d agoTutanota8kCordovaGPL-3.0End-to-end encrypted emailApp Store iPad4 shotsupdated todayWire168SwiftGPL-3.0Modern, private communications with crystal clear voice, video, group chats - always encryptedApp Store 1 shotupdated todayZulip team chat1.4kSwiftreactnativeApp Store 1 shotupdated 3mo agoActor3.3kSwiftAGPL-3.0Cross-platform instant messaging1 shotArchivedAntidote393SwiftMPL-2.0A client for https://tox.chat/App Store iPad1 shotArchivedBe my eyes0MITConnect blind people with volunteers using live video chatApp Store 4 shotsArchivedBLEMeshChat503Objective-CMPL-2.0Chat using Bluetooth 4.0 Low Energy API (Bluetooth LE)1 shotArchivedChats2kSwiftUnlicense1 shotArchivedChaty362SwiftMITAnonymous messaging with real-time data sync1 shotArchivedCommuniquéBSD-3-ClauseTwitter app that only lets send & receive DM'sArchivedFalcon Messenger433SwiftMITFast and beautiful cloud-based messaging app4 shotsArchivedM43Objective-CGPL-3.0Email with device-to-device encryption for messages sent between M users1 shotArchivedmChat0SwiftApache-2.0Real-time messaging app using firebase1 shotArchivedQuick Chat1.8kSwiftMITReal-time chat1 shotArchivedRocket.Chat1kSwiftMITFor Meteor chat platformApp Store 5 shotsArchivedSession425SwiftGPL-3.0Private messengerApp Store 1 shotArchivedSkiff Mail1kEncrypted & Decentralized EmailApp Store 2 shotsArchivedSpika611MITCross-platform messenger module1 shotArchivedsurespot0Objective-CGPL-3.0Secures all messages with end-to-end encryptionApp Store 3 shotsArchivedTextEthan47SwiftMITAllow anyone to message you1 shotArchivedTrollDrop27Objective-CMITSend trollfaces to everyone1 shotArchivedTSWeChat3.7kSwiftMITA WeChat alternative1 shotArchivedVapor Chat70SwiftBasic realtime chat project using Vapor on the server1 shotArchived

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