I doubt any of the companies are willing partners in PRISM - it's terribly bad for business, as Americans are only 4% of humans and being forced on threat of personal imprisonment to spy for the American government is not a really wise customer acquisition strategy.
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?
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?
I doubt any of the companies are willing partners in PRISM
AFAICT that was xenadu02's point - that data from Apple et al are being collect by PRISM, but Apple is not a "partner" in the sense that "partner" implies cooperation. If intelligence agencies have to steer clear of management, that's not a partnership, that's espionage.
