SKYPE is a voice-centered IM tool which runs on multiple platforms and has a global user base. The operating systems supporting SKYPE include Windows, Linux, Mac Os, Pocket PC etc. The service, which has a global user base and supports a multi-language format, has achieved a fast growth in registered users in China, and is especially beloved by Chinese users in Hong Kong, Macao, Taiwan and other Southeast Asian countries.

Currently, SKYPE boasts registered users of 220 million worldwide (by June 30, 2007, as published by ebay) and in China , Tom-skype has registered users of 42 million ( by June 30, 2007, as published by TOM).