• 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 Android iPhone S60 Web / Cloud ... Blackberry Android Tablet Windows Phone Blackberry 10 Android Wear Kindle Fire

  • Jitsi icon

    Jitsi

    Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!, GTalk/Hangouts extensions, as well as OTR...

    Open Source Mac Windows Linux Android Web / Cloud BSD

  • 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 Android iPhone Blackberry Android Tablet Web / Cloud ... iPad Apple Watch Android Wear

  • Linphone icon

    Linphone

    Linphone is an internet phone or Voice Over IP phone (VoIP). With Linphone you can communicate freely with people over the internet, with voice, video, and text instant messaging. Linphone makes use of the SIP protocol, an open...

    Open Source Mac Windows Linux Android iPhone Web / Cloud ... Windows Mobile Android Tablet Windows Phone iPad Xfce

  • 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 Android iPhone Blackberry Web / Cloud ... Android Tablet Windows Phone iPad Apple Watch

  • 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 Android iPhone Web / Cloud ... Windows Mobile Java Mobile S60 Blackberry Android Tablet Windows Phone iPad Kindle Fire

  • 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 Android iPhone Blackberry Web / Cloud

  • ooVoo icon

    ooVoo

    Free high quality video chat and video conferencing from ooVoo. Talk live face-to-face with up to 6 people at once.

    Freemium Mac Windows Android iPhone Android Tablet Windows Phone ... iPad Kindle Fire

  • Know any more alternatives to Imo?

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  • 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

  • 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

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

  • Google Duo icon

    Google Duo

    Google Duo is the cross-platform, one-to-one video calling app that's simple, reliable and fun. FEATURES Cross-platform - Get closer to everyone you love with simple, high-quality video calling on iOS and Android. Easy to...

    Free Android iPhone Android Tablet iPad

  • Zulip icon

    Zulip

    Powerful open source group chat. Features: Threaded group conversations Talk about multiple topics at once without getting lost or overwhelmed. One-on-one and group private conversations Have private conversations with one...

    Open Source Mac Windows Linux Android iPhone Web / Cloud ... BSD Self-Hosted

  • Share this list of alternatives?

  • 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

  • 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

  • Dasher Messenger icon

    Dasher Messenger

    Dasher lets you do more than just text message. It's messaging with benefits: · Connect with friends worldwide for free · Start a group chat · Find a place to meet up · Share your location in real time as...

    Free Android iPhone Web / Cloud

  • AIM icon

    AIM

    AOL Instant Messenger is an instant messaging and presence computer program which uses the proprietary OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time.HistoryAOL Instant...

    Freemium Mac Windows Android iPhone Blackberry Web / Cloud ... Windows Mobile Windows RT iPad

  • Actor Messenger icon

    Actor Messenger

    Modile-first open source self-hosted messaging platform that allows to easily create your own messaging app.

    Open Source Mac Windows Linux Android iPhone Web / Cloud ... Android Tablet iPad Self-Hosted

  • Pinger icon

    Pinger

    Pinger lets you text and talk free with the people you care about most, anywhere on the planet. Tap a picture and you'll see all of your communications—texts, pics, calls, voicemails—all in one place. Together with millions of...

    Free Personal Mac Windows Android iPhone Web / Cloud

  • Messenger icon

    Messenger

    Google's text messaging platform for Android, to send and receive SMS and MMS messages.

    Free Android

  • Spotbros icon

    Spotbros

    Spotbros is an app where you can discover and share all types of content through public chat groups (Spots) or with your friends through private chats. Download our messaging app and get 1TB of free storage in the Spotbros cloud

    Free Android iPhone Web / Cloud

  • Tinychat icon

    Tinychat

    Tinychat is easy and free video chat rooms for all. Browse through the free video chat rooms to meet friends or make your own chat room. No downloads, no signup, no problem.

    Free Android iPhone Android Tablet iPad Web / Cloud

  • AVAILO icon

    AVAILO

    AVAILO is a business communication app for teams. One place for internal and external communications, open groups for your team members, service providers and customers, with real time messaging, share emails, folders and files, in a...

    Free Android iPhone Android Tablet iPad

    • Discontinued The program seems to be no longer updated. Last app versions were released in September 2015 and can be still downloaded from the appstores. Anyway, according with their Facebook page, the company changed name to FASTEE Technologies and released a different product.
  • magicApp icon

    magicApp

    magicApp lets you choose your own phone number to get unlimited calling to the U.S and Canada.

    Commercial Android iPhone

  • 4talk Messenger icon

    4talk Messenger

    4talk IM service is a complete IM service for communicating with your phone contacts using your PC in the office or at home. You can transfer files and messages and access your correspondence from your mobile devices.

    Freemium Mac Windows Android iPhone Web / Cloud

  • Jongla icon

    Jongla

    Forget SMS. Chat with friends for free! Easily share text, stickers, images, videos, voice messages and more with your friends. Try Jongla now, you’ll love it!.

    Freemium Android iPhone Android Tablet Windows Phone iPad

  • WWChat icon

    WWChat

    Chat with people you know, or find new friends. Main Features: Share messages, photos, videos, sound/voice recordings and location. Notification of messages when application is not running. Profile picture and about information. ...

    Free Android Android Tablet

  • Silent Phone icon

    Silent Phone

    Silent Phone – Secure Encrypted Video & Voice Mobile Phone Calls You now have the ability to have secure encrypted phone calls between Silent Circle members, anywhere, anytime, with complete control. Make a secure call as...

    Commercial Android iPhone Android Tablet iPad