• 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 ... 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

  • Mumble icon

    Mumble

    Mumble is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.

    Open Source Mac Windows Linux iPhone BSD iPad

  • 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...

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

  • 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

  • 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

  • Discord icon

    Discord

    All-in-one voice and text chat for gamers that’s free, secure, and works on both your desktop and phone.

    Free Mac Windows Linux Web / Cloud Android iPhone

  • 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

  • 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...

    Open Source Mac Windows Linux Web / Cloud Windows Mobile Android ... iPhone Blackberry Android Tablet BSD Windows Phone iPad Blackberry 10 Xfce

  • 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

  • Mattermost icon

    Mattermost

    Mattermost is an open source, self-hosted Slack -alternative As an alternative to proprietary...

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

  • 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

  • Know any more alternatives to Skype?

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  • HipChat icon

    HipChat

    HipChat is an instant messaging service designed for companies and teams. It has persistent chat rooms, one-to-one chat, searchable...

    Freemium Mac Windows Linux Web / Cloud Android iPhone ... Android Tablet iPad Self-Hosted Apple Watch

  • Ring icon

    Ring

    Ring is a secure and distributed voice, video and chat communication platform that requires no centralized server and leaves the power...

    Open Source Mac Windows Linux Android

  • Rocket.Chat icon

    Rocket.Chat

    Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

    Open Source Mac Windows Linux Android iPhone Self-Hosted

  • Ekiga icon

    Ekiga

    Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323...

    Open Source Windows Linux

  • 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

  • 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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  • Curse icon

    Curse

    The next generation in gaming communication is here. Curse brings your favorite games, friends, teammates and communities together...

    Free Mac Windows Linux Web / Cloud Android iPhone ... Android Tablet iPad

  • Matrix.org icon

    Matrix.org

    Matrix is an open standard for decentralized persistent communication over IP. It can be used for decentralised group chat, ...

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

  • Actor icon

    Actor

    Actor Messenger is an encrypted messaging created by a former developer of telegram.

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

  • qiscus icon

    qiscus

    qiscus organizes your work discussions into rooms and topics to help your team become more efficient and productive.

    Free Personal Mac Windows Linux Web / Cloud Android iPhone ... Chrome OS iPad

  • 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

  • QuteCom icon

    QuteCom Discontinued

    QuteCom is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship...

    Open Source Mac Windows Linux

  • Peerio icon

    Peerio

    Peerio integrates cloud storage with a messaging platform so you can safely keep your important files online and ready to send from...

    Open Source Mac Windows Linux Android iPhone Chrome OS ... Chrome

  • Toky icon

    Toky

    Toky is an easy to setup phone support system for entrepreneurs and small business.

    Freemium Mac Linux Web / Cloud Android Android Tablet Chrome

  • ZeroChat icon

    ZeroChat

    An IRC-like internet chatroom hosted on ZeroNet, a distributed network. 0rc is a fully distributed website, and messages are shared...

    Open Source Mac Windows Linux Web / Cloud Self-Hosted Python ... JavaScript ZeroNet

  • 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

  • Hubl.in icon

    Hubl.in

    Hublin is a free and open source videoconference software provided as a SaaS . It allows to create videoconference without effort and...

    Open Source Mac Windows Linux Android Android Tablet

  • Spreed icon

    Spreed

    Spreed is the worldwide unified web conferencing service offering integrated web and telephone conferencing. It is based on Flash...

    Commercial Mac Windows Linux Web / Cloud

  • Voptop icon

    Voptop

    Voptop offers secure and anonymous telephony, instant messaging, file transfer and screen sharing/recording. The Voptop-network is a...

    Free Windows Linux Haiku

  • GameVox icon

    GameVox

    GameVox provides group voice communications for gaming communities.

    Freemium Mac Windows Linux

  • VIPole Secure Messenger icon

    VIPole Secure Messenger

    VIPole is a Secure Instant Messenger for secure messaging, encrypted voice/video calls, group chats that provides highly secure and...

    Freemium Mac Windows Linux Android iPhone

  • Output Messenger icon

    Output Messenger

    Private and Secure Instant Messenger for Office designed specifically for keeping remote employees and multiple offices in sync. ...

    Commercial Mac Windows Linux Android iPhone Self-Hosted

  • These alternatives are not yet approved, do you think they are alternatives?