Hangouts
Free
Hangouts is an instant messaging software developed by Google.
Linphone
Open Source
Linphone is a free voice over IP (VoIP) service and SIP client.
Fring
Freemium
Fring connects with Skype, MSN Messenger, ICQ and Google Talk from your iPhone.
Talkatone
Freemium
Talkatone is a free calling app.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
Ring
Open Source
Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.
Zoiper
Freemium
Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.
MicroSIP
Open Source
MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.
Compare CSipSimple with alternatives
Compare Hangouts and CSipSimple and decide which is most suitable for you.
Compare Linphone and CSipSimple and decide which is most suitable for you.
Compare Talkatone and CSipSimple and decide which is most suitable for you.
Compare MicroSIP and CSipSimple and decide which is most suitable for you.