Google! Now that's a company you can really trust your privacy to.
The beauty of the Droid OS is that the OS itself is open source. While Google provides wireless service portals for the OS, there are so many derivatives of the Droid OS that Google doesn’t control the libraries/repositories for all of them.
There’s been a lot of work done to “clean up” the repository code on these operating systems whereas Apple’s OS is proprietary and while you can “jail break” your phone, you’re still stuck with the Apple kernels.