Freemium

Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.

Hangouts

Free

Hangouts is an instant messaging software developed by Google.

WhatsApp Messenger

Free

WhatsApp Messenger is an instant messaging platform owned by Facebook.

Adium

Open Source

Adium is an Open source multi-protocol instant messaging client for Mac OS X, supports MSN, Jabber, Yahoo! and other networks.

Tox

Open Source

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Viber

Freemium

Viber Free Messenger and Phone Calls.

Signal

Open Source

Signal is the most scalable encryption tool.

Imo

Free

Imo free video calls and chat is a kind of Communication apps for Android.

Empathy

Open Source

Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication ov…

IM+

Freemium

IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.

RetroShare

Open Source

RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network b…

Wire

Free

Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…

Ring

Open Source

Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.

FaceTime

Freemium

FaceTime is a proprietary videotelephony product developed by Apple Inc. FaceTime Audio is an audio-only version.

Rocket.Chat

Open Source

Rocket.Chat free open source chat solution.

Kik

Free

Kik Messenger is an instant messenger software.

Xabber

Open Source

Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.

Bitmessage

Open Source

Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another…

Let's Chat

Open Source

Let's Chat is a persistent messaging application that runs on Node.js and MongoDB. It's designed to be easily deployable and fits well with small, intimate te…

KakaoTalk

Freemium

KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.

Conversations

Freemium

Conversations is an open source XMPP/Jabber client for the Android platform.

Flock

Freemium

Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution.

Google Duo

Free

Google Duo is a video chat mobile app available on the Android and iOS operating systems.

Jitsi Meet

Open Source

Jitsi Meet is an open-source (Apache) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, scalable video conferences.

GroupMe

Free Personal

GroupMe is a mobile group messaging app.

Pidgin

Open Source

Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.

Free

Telegram is a free cloud-based instant messaging platform.

Slack

Freemium

Slack is a cloud-based team collaboration tool.

Mumble

Open Source

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

Trillian

Freemium

Trillian is a proprietary multiprotocol instant messaging application.

Discord

Free

Discord is a freeware proprietary VoIP application designed for gaming communities.

Jitsi

Open Source

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Facebook Messenger

Free

Facebook Messenger is the official Facebook app that lets you have text conversations with all of your friends on the popular social network.

TeamSpeak

Freemium

TeamSpeak is software for quality voice communication via the Internet.

LINE

Freemium

LINE is a new communication app which allows you to make free voice calls and send free messages whenever and wherever you are.

Mattermost

Open Source

Mattermost is an open source, private cloud Slack-alternative, Workplace messaging for web, PCs and phones. MIT-licensed.

Kopete

Open Source

Kopete is a multi-protocol, free software instant messaging client released as part of the KDE Software Compilation. Although it can run in numerous environme…

ICQ

Free

ICQ is an open source instant messaging software.

WeChat

Freemium

WeChat is a social media with instant messaging, commerce and payment services application.

ChatSecure

Open Source

ChatSecure is a messaging application for iOS which allows OTR and OMEMO encryption for the XMPP protocol.

Off-the-Record Messaging

Open Source

Off-the-Record Messaging (OTR) is a cryptographic protocol that provides encryption for instant messaging conversations.

Threema

Commercial

Threema is an encrypted instant messaging application for iOS, Android and Windows Phone.

Matrix.org

Open Source

Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with…

Torchat

Open Source

TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text mess…

BlackBerry Messenger

Freemium

BlackBerry Messenger, also known as BBM is an instant messenger and videotelephony application included on BlackBerry devices that allows messaging and voice …

TribeScale

Free

TribeScale is an All-in-One platform to coordinate your team around what really matters - communication, goals, decisions, tasks and results.

Grape

Commercial

Grape is an REST-like API framework for Ruby. It's designed to run on Rack or complement existing web application frameworks such as Rails and Sinatra by prov…

Tencent QQ

Free

Tencent QQ (QQ) is an instant messaging software service.

Bit Chat

Open Source

Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.

Zulip

Open Source

Zulip is a chat and collaborative software.

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Skype vs Riot.im

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Pidgin vs Riot.im

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Hangouts vs Riot.im

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Telegram vs Riot.im

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WhatsApp Messenger vs Riot.im

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Slack vs Riot.im

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Adium vs Riot.im

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Mumble vs Riot.im

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Tox vs Riot.im

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Trillian vs Riot.im

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Viber vs Riot.im

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Discord vs Riot.im

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Signal vs Riot.im

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Jitsi vs Riot.im

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Imo vs Riot.im

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Facebook Messenger vs Riot.im

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Empathy vs Riot.im

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TeamSpeak vs Riot.im

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IM+ vs Riot.im

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LINE vs Riot.im

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RetroShare vs Riot.im

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Mattermost vs Riot.im

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Wire vs Riot.im

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Kopete vs Riot.im

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Ring vs Riot.im

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ICQ vs Riot.im

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FaceTime vs Riot.im

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WeChat vs Riot.im

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Rocket.Chat vs Riot.im

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ChatSecure vs Riot.im

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Kik vs Riot.im

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Off-the-Record Messaging vs Riot.im

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Xabber vs Riot.im

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Threema vs Riot.im

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Bitmessage vs Riot.im

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Matrix.org vs Riot.im

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Let's Chat vs Riot.im

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Torchat vs Riot.im

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KakaoTalk vs Riot.im

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BlackBerry Messenger vs Riot.im

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Conversations vs Riot.im

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TribeScale vs Riot.im

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Flock vs Riot.im

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Grape vs Riot.im

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Google Duo vs Riot.im

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Tencent QQ vs Riot.im

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Jitsi Meet vs Riot.im

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Bit Chat vs Riot.im

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GroupMe vs Riot.im

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Zulip vs Riot.im

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