MicroSIP is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is Wire. It's not free, so if you're looking for a free alternative, you could try Wire or Linphone. If that doesn't suit you, our users have ranked more than 25 alternatives to MicroSIP and 11 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to MicroSIP are Yate - Yet Another Telephony Engine, Callcentric, Blink and Twinkle.
Wire is the most secure collaboration platform featuring messenger, voice, video, conference calls, file-sharing, and external collaboration –all protected by the most secure end-to-end-encryption.
Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
Linphone has a far worse UI and has no way to, for example, set up an SIP account with a proxy server.
Zoiper IAX & SIP multilanguage and multiplatform (Windows, Linux and Mac OS X) softphone is a VoIP soft client, meant to work with any IP-based communications systems and infrastructure.
Yate is a softswitch (concept of separating the network hardware from network software).
It isn't a softphone like MicroSIP.
The Callcentric Android app allows existing Callcentric customers to place calls worldwide using their Callcentric account.
YateClient is a free Voip Client (SIP / IAX / GVoice) and Instant Messenger (Facebook / GTalk / Jabber), with it you're permanently connected on multiple chat and telephony accounts.
Fully end-to-end encrypted business collaboration platform that is the only on the market supporting E2EE HD video conference up to 100 participants.
Spreed is the worldwide unified web conferencing service offering integrated web and telephone conferencing. It is based on Flash Player. Free service includes 3 attendees and max 1.5h meetings. Single events or monthly service can be purchased.
Switzerland
France
EU
Bulgaria
United States
Netherlands
Germany
its not a SIP client, its PAID social network.