MicroSIP is described as «free portable SIP softphone for Windows based on PJSIP stack» and is an app in the social & communications category. There are more than 25 alternatives to MicroSIP for a variety of platforms, including Windows, Mac, Android, Linux and iPhone. The best alternative is Wire. It»s not free, so if you»re looking for a free alternative, you could try Linphone or YakYak. Other great apps like MicroSIP are Zoiper, CSipSimple, PhonerLite and Telephone.MicroSIP alternatives are mainly Video Calling Apps but may also be Instant Messengers or Group Chat Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of MicroSIP.