This excerpt taken from the VRSN 10-K filed Mar 3, 2009.
Competition in Commerce Services: Our wireless billing and payment services are also subject to competition from providers such as Comverse, Amdocs, Convergys Corporation and Boston Communications
Group. We are also aware of major Internet service providers, software developers and smaller entrepreneurial companies that are or may in the future be focusing significant resources on developing and marketing products and services that may compete directly with ours. Furthermore, customers are increasingly likely to deploy internally developed communications technologies and services which may reduce the demand for technologies and services from third-party providers such as VeriSign and further increase competitive pricing pressures.
Competition in Content Services: The market for content services is extremely competitive. Competitors include developers of content and entertainment products and services in a variety of domestic and international markets, such as Infospace, Itouch, Arvato mobile, Monstermob, and Motricity. This business also faces competition from mobile network operators such as Cingular, Verizon Wireless, Sprint Nextel Corporation, T-Mobile, Vodafone, O2, Orange, E-Plus and Telefónica, as well as Internet portal operators such as Yahoo!, AOL, T-Online and Google. Additional competitors are handset manufacturers such as Nokia and software providers such as Microsoft and Apple. As the market for wireless data, including information and entertainment data, matures, new categories of competitors, such as mobile phone companies, broadcasters, music publishers, other content providers or others have begun to develop competing products or services.
Competition in Real-Time Publishing Services: We face competition from various smaller companies providing similar services.