Alternatives to Spark for all platforms with any license

  • 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

  • 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 Android BSD

  • Trillian icon

    Trillian

    Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between...

    Freemium Mac Windows Linux Web / Cloud Android iPhone ... Blackberry iPad

  • 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

  • Miranda IM icon

    Miranda IM

    Miranda IM is the smaller, faster, easier instant messenger with support for multiple protocols. Designed from the ground-up to be...

    Open Source Windows

  • Empathy icon

    Empathy

    Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell...

    Open Source Linux BSD

  • Psi icon

    Psi

    Psi is an instant messaging application for Windows, Linux, and Mac OS X that connects to the free, open Jabber IM network (also known...

    Open Source Mac Windows Linux BSD

  • IM+ icon

    IM+

    Chat everywhere! IM+ is the most widely used mobile IM app! Connect all-in-one to MSN, Yahoo!, Google Talk, AIM, Jabber, ICQ...

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

  • Gajim

    The goal of Gajim is to provide a full featured and easy to use Jabber client. Gajim works nicely with GNOME, but does not require it...

    Open Source Windows Linux BSD Xfce

  • Jappix icon

    Jappix

    Jappix is a fresh new open social platform which enables you to create your own cloud, wherever you want to. People must be able to...

    Open Source Web / Cloud Self-Hosted

  • 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

  • YakYak icon

    YakYak

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

    Open Source Mac Windows Linux

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  • Disa icon

    Disa

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

    Open Source Android Android Tablet Kindle Fire

  • MetroIRC icon

    MetroIRC

    An IRC client for the Windows desktop which follows the Metro design guidelines.

    Open Source Windows

  • Ayttm icon

    Ayttm

    Ayttm is an instant messaging (aka chat) client that provides all-in-one chat functionality for several major instant messaging...

    Open Source Windows Linux BSD

  • Tkabber icon

    Tkabber

    Tkabber is a Free and Open Source client for the Jabber instant messaging system. Its writen in Tcl/Tk, and works on many platforms...

    Open Source Mac Windows Linux BSD

  • 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

  • Pandion icon

    Pandion

    Pandion is an open source instant messaging client for XMPP networks. Keep in touch with friends or collaborate with colleagues...

    Open Source Windows

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  • Kaiwa icon

    Kaiwa

    Inspired by the best and built for XMPP, Kaiwa is a beautiful web-based client for the only standardized chat protocol.

    Open Source Linux Web / Cloud Self-Hosted Node.JS

  • Jabiru icon

    Jabiru Discontinued

    Jabber client for Android.

    Free Android

  • QIP Infium icon

    QIP Infium Warning

    QIP Infium is a multiprotocol instant messaging client. It supports ICQ (OSCAR), Jabber (XMPP), Mail.ru Agnet (MRA), IRC, XIMSS, SIP...

    Free Windows iPhone S60

  • KouChat icon

    KouChat

    KouChat is a simple serverless chat client for local area networks (wifi). With KouChat you can communicate with other KouChat users...

    Open Source Mac Windows Linux Android Android Tablet

  • 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

  • shMessenger icon

    shMessenger Discontinued

    ShMessenger Mobile is a free instant messaging client for mobile phones, which supports YMSG (Yahoo!), MSN and GTalk protocols. In...

    Free Java Mobile

  • AQQ Instant Messanger icon

    AQQ Instant Messanger

    AQQ is a Polish (but available in English) multiprotocol instant messenger with support of: AQQ, Jabber, Gadu-Gadu, Tlen and ICQ. It...

    Free Windows

  • Sim-IM icon

    Sim-IM Discontinued

    Sim-IM, Simple Instant Messenger, is a multiple protocol instant messenger for MS Windows, GNU/Linux, FreeBSD. Sim-IM supports...

    Free Windows Linux BSD

  • OctroTalk icon

    OctroTalk

    OctroTalk is an Jabber/Gtalk client with support for GTalk (GMail) audio and Video calls. OctroTalk also supports SIP calling (through...

    Free Mac Android iPhone Android Tablet Windows Phone iPad

  • Centericq Discontinued

    Centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu and Jabber...

    Open Source Mac Windows Linux BSD