Google and Apple are still subject to the same pressures applied by warrants, subpeonas and national security letters.

I'm not really sure what you mean by encryption, though. Apple's iMessage may be encrypted, but their key exchange can be MitM'd easily.

Realistically you wouldn't use a service that exists because of the profit motive or is in the US. It will continue to operate to drive a profit while working with the government to stay in business.