Apple has gotten a fair amount of flack over Siri – most of it relating to Siri not recognizing words or phrases, misinterpreting requests, or providing incomplete or inaccurate answers. Apple is even facing a class action lawsuit over Siri not working as promised by iPhone 4S ads.
For IBM, however, the concern isn’t that Siri won’t work as advertised. Big blue is worried that Siri will work exactly as advertised and that confidential and sensitive information will leak outside IBM’s network as a result. For those reasons, the company disables Siri on the iPhones of its employees.