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.

Trillian

Freemium

Trillian is a proprietary multiprotocol instant messaging application.

Jitsi

Open Source

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

Imo

Free

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

Linphone

Open Source

Linphone is a free voice over IP (VoIP) service and SIP client.

Franz

Free

Franz is a free messaging app /former emperor of Austria, that combines chat & messaging services into one application.

Rocket.Chat

Open Source

Rocket.Chat free open source chat solution.

qutIM

Open Source

qutIM is free and open-source multiprotocol (ICQ, Jabber, Mail.Ru, IRC, VKontakte) instant messenger.

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.

QuteCom

Open Source

QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.

Phoner

Free

Phoner and PhonerLite are softphone applications for Windows operating systems available as freeware.

Pidgin

Open Source

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

Tox

Open Source

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

Signal

Open Source

Signal is the most scalable encryption tool.

Miranda IM

Open Source

Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.

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.

Mattermost

Open Source

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

Ring

Open Source

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

Spark

Open Source

Apache Spark is an open-source cluster-computing framework.

Psi+

Open Source

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

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.

MicroSIP

Open Source

MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.

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Skype vs YakYak

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Pidgin vs YakYak

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Hangouts vs YakYak

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Tox vs YakYak

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Trillian vs YakYak

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Signal vs YakYak

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Jitsi vs YakYak

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Miranda IM vs YakYak

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Imo vs YakYak

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Facebook Messenger vs YakYak

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Linphone vs YakYak

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Mattermost vs YakYak

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Franz vs YakYak

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Ring vs YakYak

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Rocket.Chat vs YakYak

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Spark vs YakYak

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qutIM vs YakYak

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Psi+ vs YakYak

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Zoiper vs YakYak

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Blink vs YakYak

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Bit Chat vs YakYak

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Coccinella vs YakYak

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QuteCom vs YakYak

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MicroSIP vs YakYak

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Phoner vs YakYak

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YakYak Windows Alternatives

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