Siphon SIP vs Zoiper
A side-by-side look at Siphon SIP and Zoiper. For an in-depth review of either product, follow the links below.
Siphon SIP
Social & Communications
Siphon SIP is a voice over IP (VoIP) software for making internet calls. It allows you to make free SIP calls to other Siphon users as well as cheap calls to phones globally.
voipsipinternet-callsfree-calls
Zoiper
Social & Communications
Zoiper is a softphone application for making VoIP calls over the internet. It supports popular protocols like SIP, IAX, and H.323. Zoiper provides high quality audio/video calls, instant messaging, presence management and other communication features.
softphonevoipsipiaxh323audio-callsvideo-callsinstant-messagingpresence-management
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