• Skype icon

    Skype

    Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice call...

    Freemium Mac Windows Linux Web / Cloud Android iPhone ... Blackberry Windows RT Android Tablet BSD Windows Phone iPad Apple Watch Android Wear

  • Pidgin icon

    Pidgin

    Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks...

    Open Source Mac Windows Linux BSD Xfce

  • 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....

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

  • 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

  • Jitsi icon

    Jitsi

    Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports protocols...

    Open Source Mac Windows Linux Web / Cloud BSD

  • Signal icon

    Signal

    TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees...

    Open Source Mac Windows Linux Android iPhone Chrome

  • Adium icon

    Adium

    Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under the GNU...

    Open Source Mac

  • LINE icon

    LINE

    LINE is a Japanese proprietary application for instant messaging on smartphones and PCs. Line users exchange text messages, graphics...

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

  • 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...

    Freemium Mac Windows Web / Cloud Android iPhone Android Tablet ... iPad

  • 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...

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

  • Apple Messages icon

    Apple Messages

    Apple Messages lets you send messages to anyone on a Mac, or an iPhone, iPad, or iPod touch running iOS 5. Messages appear on your Mac...

    Free Mac iPhone iPad

  • Instantbird icon

    Instantbird Discontinued

    Instantbird is an instant messaging client based on Mozilla XULRunner and the open source library libpurple created by the software...

    Open Source Mac Windows Linux

  • Know any more alternatives to Trillian?

    Suggest an application to this list
  • 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

  • Spark icon

    Spark

    Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group...

    Open Source Mac Windows Linux Self-Hosted

  • Psi+ icon

    Psi+

    Psi+ is a development branch of Psi IM XMPP/Jabber client. Psi is a cross-platform powerful XMPP/Jabber client (Qt, C++) designed...

    Open Source Mac Windows Linux BSD

  • Quassel IRC icon

    Quassel IRC

    Quassel IRC is a modern, cross-platform, distributed IRC client based on the Qt4 framework. Distributed means that one (or multiple)...

    Open Source Mac Windows Linux

  • Franz icon

    Franz

    Franz is a free messaging app/former Emperor of Austria and combines chat & messaging services into one application. He currently...

    Free Mac Windows Linux

  • Kopete icon

    Kopete

    Kopete is an instant messenger supporting AIM, ICQ, MSN, Yahoo, Jabber, IRC, Gadu-Gadu, Novell GroupWise Messenger, and more. It is...

    Open Source Mac Linux BSD

  • Share this list of alternatives?

  • 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....

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

  • Bleep icon

    Bleep

    Private instant messaging via secure, distributed technology. Download & Go Enjoy the benefits of having an account without...

    Free Mac Windows Android iPhone Android Tablet iPad

  • YakYak icon

    YakYak

    What does it do: * Send/receive chat messages * Create/change conversations (rename, add people) * Leave/delete...

    Open Source Mac Windows Linux

  • Coccinella icon

    Coccinella

    Coccinella is a free and open-source cross-platform instant messaging client with a built-in whiteboard for improved collaboration...

    Open Source Mac Windows Linux BSD

  • QQ International icon

    QQ International

    Tencent QQ, generally referred to as QQ, is the most popular free instant messaging computer program in Mainland China, and has over...

    Free Mac Windows Android iPhone Android Tablet BSD ... Windows Phone iPad Facebook

  • LimeChat icon

    LimeChat

    LimeChat is an IRC client for Windows, Mac OS X and iOS. Features Can connect to multiple servers in a window By key operation...

    Open Source Mac Windows iPhone iPad

  • qutIM icon

    qutIM Discontinued

    qutIM - free open-source multiprotocol ( ICQ, Jabber/GTalk/Ya.Online/LiveJournal.com, Mail.Ru, IRC ) instant messenger for Windows...

    Open Source Mac Windows Linux S60 BSD Haiku

  • Brosix icon

    Brosix

    Brosix is a secure Instant Messaging and collaboration tool, ideal for everyday communication for business and leisure. Two...

    Free Personal Mac Windows Linux Web / Cloud 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...

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

    Free Personal Mac Windows Web / Cloud Android iPhone

  • Indoona icon

    Indoona

    Indoona is the first app to communicate and share your posts with the contacts in your phonebook Features: * FREE CALLS FOREVER:...

    Freemium Mac Windows Web / Cloud Android iPhone Windows Phone

  • centerim icon

    centerim

    Centerim is an command line interface chat client for the common protocols like icq, msn, aim, jabber, ...

    Open Source Mac Linux BSD

  • Line2 icon

    Line2

    Line2 is a VoIP phone service that lets you call & text from a separate phone number via WiFi or 3G/4G/LTE. $9.99/mo: Text &...

    Commercial Mac Windows Android iPhone Android Tablet iPad ... Apple Watch Kindle Fire

  • AIM icon

    AIM

    AOL Instant Messenger is an instant messaging and presence computer program which uses the proprietary OSCAR instant messaging...

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

  • BitlBee icon

    BitlBee

    BitlBee brings IM (instant messaging) to IRC clients. It's a great solution for people who have an IRC client running all the time...

    Open Source Mac Windows Linux BSD

  • Camfrog icon

    Camfrog

    Free live webcam video chat room software for multiple desktop platforms including mobile platforms like iOS and Android. Make...

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

  • Messenger for Desktop icon

    Messenger for Desktop

    A simple & beautiful app for Facebook Messenger. Chat without distractions on any Operating System.

    Open Source Mac Windows Linux