SightSpeed

SightSpeed is a videoconferencing company, supplying VoIP and instant messaging app for Windows and macOS operating systems. The service allows people to make video calls, computer-to-computer voice calls, and calls to regular telephones, with free and paid versions.
In October 2008, the company was acquired by Logitech for $30 million. The Logitech Vid service is based on SightSpeed's technology. Due to competing software, the Logitech Vid video calling service will be discontinued as of 1 July 2013 and the downloading of the product has already been terminated. As a result, Logitech is no longer accepting new account registrations.
Technology.
SightSpeed uses a proprietary algorithm for video compression. The video conferencing technology is capable of transmitting 30 frame/s video, and uses the standards-based H263 codec.
SightSpeed's video codec was originally developed at Cornell University's Discover Lab and is based on H263.
SightSpeed's network technology is SIP based.
Limitations.
The main criticisms are: