Earlier quoted context omitted.
The Washington Post documents claim otherwise: http://www.washingtonpost.com/wp-srv/special/politics/prism-...
That link doesn't contradict xenadu02's claim. Do you have a link that better spells out that Apple is a willing partner in PRISM?
It is really quite likely that the access to Apple and Google and other large providers' systems is done at an operations level, without knowledge of their management and providing for complete plausible deniability. How many network admins and ops people at Apple have physical access to the machines where keys are generated, stored, and used?
https://en.wikipedia.org/wiki/Tailored_Access_Operations
The #1 realtime end-to-end encrypted messaging service on the planet (where the software development and cyphertext transmission are both physically present inside the legal jurisdiction of the US) would be your first choice, no?