Deltathree Inc. is an American company engaged in the business of voice over IP telephony services. The company was one of the first in the world to offer a telephony service over the internet, reducing the cost of international calls by over 90 percent.
Users can either use the free softdialer product and make calls through their computer, or sign up for the broadband phone service and receive an Analog Telephony Adapter (ATA) or the linksys PAP2 device. Both devices allows users to plug a standard phone into their internet connection and make calls independent of the PC.
History
Deltathree was founded in 1996 by Dmitry Goroshevsky, Sophia Babkove, Damian Kudriavtsev, Elie Wurtman and Jacob Ner David to develop an Internet-based international low cost calling service using VoIP technology, and a "PC to Phone" solution, using a technology developed by Israeli company VocalTec Communications.[2] RSL Communications, an investment firm owned by Ronald Lauder, acquired a majority stake in Deltathree the following year,[3] before the company listed on the NASDAQ stock exchange in November 1999.[3]