Skype
Freemium
Skype is an instant messaging and VOIP (Voice Over Internet Protocol) client to communicate with people in a distant place.
Slack
Freemium
Slack is a cloud-based team collaboration tool.
Viber
Freemium
Viber Free Messenger and Phone Calls.
Signal
Open Source
Signal is the most scalable encryption tool.
Linphone
Open Source
Linphone is a free voice over IP (VoIP) service and SIP client.
Zoiper
Freemium
Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.
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.
Sneek
Freemium
Sneek is a constant presence tool for digital nomads, remote jobs.
Wickr
Free
Wickr is an instant messenger application.
Toky
Freemium
Toky is an automation platform.
Telegram
Free
Telegram is a free cloud-based instant messaging platform.
Tox
Open Source
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
Discord
Free
Discord is a freeware proprietary VoIP application designed for gaming communities.
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…
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…
Blink
Freemium
Blink is the best real-time communications client using the SIP protocol.
Coccinella
Open Source
Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.
QuteCom
Open Source
QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Tkabber
Open Source
Tkabber is a GPL instant messaging client for the XMPP protocol which uses the Tk toolkit for the GUI.
Compare Wire with alternatives
Compare Dialog Messenger and Wire and decide which is most suitable for you.