• Telegram icon

    Telegram

    Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful. .

    Free Mac Windows Linux Web / Cloud Android iPhone Android Tablet BSD Windows Phone iPad Apple Watch Android Wear PortableApps.com FreeBSD

  • Hangouts icon

    Hangouts

    Hangouts is a messaging app that lets you send and receive messages, photos and more, and even start free video and voice calls – one to one or with a group! "Hangouts" are places used to facilitate group video chat (with...

    Free Windows Web / Cloud Android iPhone Chrome OS Android Tablet iPad Chrome Android Wear

  • Slack icon

    Slack

    Slack brings all your communication together in one place. It's real-time messaging, archiving and search for modern teams.

    Freemium Mac Windows Linux Web / Cloud Android iPhone BSD Apple Watch Electron / Atom Shell

  • Tox icon

    Tox

    Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

    Open Source Mac Windows Linux Android iPhone Android Tablet BSD

  • WhatsApp Messenger icon

    WhatsApp Messenger

    WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those...

    Free Mac Windows Web / Cloud Android iPhone S60 Blackberry Android Tablet Windows Phone Blackberry 10 Android Wear Kindle Fire

  • Signal icon

    Signal

    TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or...

    Open Source Mac Windows Linux Android iPhone Chrome

  • Viber icon

    Viber

    Viber is a mobile application that lets you make free phone calls and send text messages to anyone who also has the application installed. .

    Freemium Mac Windows Linux Android iPhone Windows RT Android Tablet Windows Phone iPad Blackberry 10 Apple Watch

  • Facebook Messenger icon

    Facebook Messenger

    Facebook Messenger is a faster way to message. Reach friends right on their phones, get and send messages fast, message everyone at once and more. Top Features: • Message friends, groups of friends or anyone in your mobile...

    Free Windows Web / Cloud Android iPhone Blackberry Android Tablet iPad Apple Watch Android Wear

  • Trillian icon

    Trillian

    Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped...

    Freemium Mac Windows Linux Web / Cloud Android iPhone Blackberry iPad

  • Mattermost icon

    Mattermost

    Mattermost is an open source, self-hosted Slack -alternative As an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable...

    Open Source Mac Windows Linux Android iPhone Android Tablet iPad Self-Hosted JavaScript Go (Programming Language)

  • Wire icon

    Wire

    Wire is a secure and private messenger for phones, tablets and desktop. Crystal clear voice and video calls, private group chats, file sharing, audio and video messages - everything is end-to-end encrypted. Wire works on Android, iOS...

    Free Mac Windows Linux Web / Cloud Android iPhone Chrome OS Android Tablet iPad Microsoft Edge Chrome Opera Firefox

  • LINE icon

    LINE

    LINE is a Japanese proprietary application for instant messaging on smartphones and PCs. Line users exchange text messages, graphics, video and audio media, make free VoIP calls, and hold free audio or video conferences.

    Freemium Mac Windows Web / Cloud Android iPhone Blackberry Android Tablet Windows Phone iPad Apple Watch

  • Know any more alternatives to Zulip?

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  • Empathy icon

    Empathy

    Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application. ...

    Open Source Linux BSD

  • Riot.im icon

    Riot.im

    Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both public and private and provides messaging, filesharing, voice and video conferencing (beta on Android and...

    Open Source Web / Cloud Android iPhone iPad Self-Hosted Chrome Safari Firefox

  • ICQ icon

    ICQ

    ICQ is one of the oldest instant messengers. First developed by the Israeli company Mirabilis, sold to AOL, sold again and currenly owned by the Russian "mail.ru" group (known for one of the largest social networks). ICQ has...

    Free Mac Windows Linux Web / Cloud Windows Mobile Android iPhone Java Mobile S60 Blackberry Android Tablet Windows Phone iPad Kindle Fire

  • Imo icon

    Imo

    Message and video chat with your friends and family for free. Features - Make high-quality video and voice calls on Android and iPhone - Send unlimited messages and make free video and voice calls over your 2G, 3G, 4G or Wi-Fi...

    Free Windows Android iPhone Android Tablet iPad

  • Glip icon

    Glip

    Glip is instant messaging for teams and businesses to communicate and get work done at the same time. In Glip you work where your conversations are, so you always know what your team is doing and what needs to get done next. Video...

    Freemium Mac Windows Web / Cloud Android iPhone Android Tablet iPad

  • ChatSecure icon

    ChatSecure

    [ChatSecure by Chris Ballinger and Gibberbot by The Guardian Project have combined efforts!] ChatSecure (formerly “Gibberbot”) is an open-source encrypted messaging application that uses Cypherpunks' Off-the-Record protocol to...

    Open Source Android iPhone iPad

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  • Matrix.org icon

    Matrix.org

    Matrix is an open standard for decentralized persistent communication over IP. It can be used for decentralised group chat, WebRTC signaling, IoT-data transfer, and generally to link together fragmented silos of...

    Open Source Mac Windows Linux Web / Cloud Android iPhone Android Tablet iPad Self-Hosted WebRTC Python JavaScript Go (Programming Language) Java Perl

  • WeChat icon

    WeChat

    WeChat is a complete mobile communication and private social networking app. Free, cross-platform, and full-featured, WeChat is the best way to keep in touch with everyone you care about. Features WECHAT OUT CALLS: Make calls to...

    Freemium Mac Windows Android iPhone S60 Blackberry Android Tablet Windows Phone iPad Apple Watch

  • Yahoo! Messenger icon

    Yahoo! Messenger

    Stay in touch with your friends and family while sharing favorite photos using one of the most popular instant messaging applications.

    Free Web / Cloud Android iPhone Blackberry

  • Let's Chat icon

    Let's Chat

    Self-hosted chat for small teams. Features and Stuff BYOS (bring your own server) Persistent messages Multiple rooms New message alerts / notifications Mentions (hey @you) Image embeds Code...

    Open Source Self-Hosted

  • Threema icon

    Threema

    Threema is a new mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages. Unlike other popular messaging apps (including...

    Commercial Android iPhone Android Tablet Windows Phone iPad Android Wear

  • Kik icon

    Kik

    Kik helps you stay connected and keep in the loop with friends, all through chat. Kik offers free, unlimited texting to Kik users worldwide, no matter what type of smartphone they use. FEATURES • Choose who to chat with...

    Free Android iPhone S60 Windows Phone Kindle Fire

  • Conversations icon

    Conversations

    Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG]. [Note] You can download it from F-Droid: ...

    Freemium Android Android Tablet Self-Hosted

  • Path icon

    Path

    Path is a personal social network designed to help you be closer with family and friends. Now with Path 3, we’ve added private messaging and stickers so you can chat instantly with the ones you love. By focusing on beautiful design...

    Free Web / Cloud Android iPhone Android Tablet Windows Phone iPad Kindle Fire

  • Nimbuzz icon

    Nimbuzz

    Nimbuzz offers limited availablility free calls and limited availability free text messaging for users via 3G and WiFi. Calls to other Nimbuzz users are free. PAY to call mobile or landline phones for as little as $0.02/minute in...

    Freemium Mac Windows Web / Cloud Android iPhone Java Mobile S60 HP webOS Blackberry Android Tablet Windows Phone iPad Chrome Kindle Fire

  • Instantbird icon

    Instantbird

    Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the software developers of Pidgin . Over 250 add-ons allow user customization...

    Open Source Mac Windows Linux PortableApps.com

  • Kontalk icon

    Kontalk

    Kontalk is an open source replacement for WhatsApp. Server and client software are open and hosting your own server is possible but not required. All communication is encrypted.

    Open Source Android Self-Hosted

  • BlackBerry Messenger icon

    BlackBerry Messenger

    BlackBerry Messenger is a FREE messaging app available for Blackberry, iOS, Android and Windows Phone. BBM has unique features to protect your privacy and keep you in control: • Retract – The ability to take back messages and photos...

    Freemium Android iPhone Blackberry Android Tablet Windows Phone iPad Apple Watch Android Wear Kindle Fire

  • WhatsApp Web for Chrome icon

    WhatsApp Web for Chrome

    Simple and light WhatsApp Web client with beautiful icons, native behavior, and customizability options. NATIVE BEHAVIOR WhatsApp Web opens stuck to the bottom right corner of your display, like a native IM app (and like the...

    Free Mac Windows Linux Chrome

  • Bleep icon

    Bleep

    Private instant messaging via secure, distributed technology. Download & Go Enjoy the benefits of having an account without the hassle of creating one. Simply download the app, invite your friends and start chatting. ...

    Free Mac Windows Android iPhone Android Tablet iPad

  • Disa icon

    Disa

    Unified Messaging is awesome! Disa is your new messaging hub. Conversations from different services can seamlessly be joined together, or disbanded within seconds.

    Open Source Android Android Tablet Kindle Fire

  • KakaoTalk icon

    KakaoTalk

    KakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service) Message arrivals are instantly notified with Push Alert and you can send...

    Freemium Mac Windows Android iPhone Blackberry Windows Phone Android Wear Kindle Fire

  • Silence.im icon

    Silence.im

    Protect your communication in transit and on your phone. Silence (formerly SMSSecure) is a full replacement for the default text messaging application: all messages are encrypted locally and messages to other Silence users are...

    Open Source Android Kindle Fire

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