Xabber
Conversations.im
Signal
WhatsApp
Telegram
Pidgin
ChatSecure
Element.io
Linphone
Zoiper
MicroSIP
Jitsi
Skype
Sipdroid
Sipnetic
MizuDroid
Xabber LinphoneBased on our record, Linphone seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Well I can tell you that any SIP program can do this, one that comes to mind is Linphone. But you do need a provider. Almost all providers deal with UDP. You might be able to find one that transmits over tcp but that’ll be a very small list. TCP isn’t reliable for VoIP, for media anyway. At best you’ll find one that encrypts the signaling over TLS, which is TCP. But audio, even if encrypted too, is done over UDP.... Source: over 1 year ago
Does Linphone (https://linphone.org/) not meet that need of cross platform (website claims versions for all major OS'es) and open source (https://gitlab.linphone.org/BC/public/linphone-desktop)? - Source: Hacker News / over 1 year ago
Similarly, you can use any SIP (VoIP) provider (e.g. VOIPo Cloud), and configure the SIP account details in your native phone app. This way you will also be able to use a SIP softphone on your computer (e.g. LinPhone on Linux or Telephone on Mac), or even a real SIP phone in your home. Depending on your SIP plan you may or may not be able to make international calls this way. Source: over 2 years ago
I heard on RFD Fonus is using linphone.org to code their service. Source: almost 3 years ago
Conversations.im - XMPP client designed with ease of use and security in mind
Zoiper - Cross-platform VoIP softphone dialer for SIP and IAX systems
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
MicroSIP - MicroSIP is a free portable SIP softphone for Windows based on PJSIP stack.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Jitsi - Open-source video calling and chat platform.