You can make a case for Google tbh. Apple has what, 30% of the market at best, while every phone manufacturer uses Google by default. Heck, I don't know where to begin to brake Google's grip without seriously fragment everything.
You can't escape google even if you want to, whereas with Apple you only need to switch phones.
Apple has more than half of US market share.
For google, it's an open and shut case. Look up how they force numerous other companies to collude with them using their open handset aliance contract. They explicitly prohibit "forking android" which they consider creating a non-android OS with an android app loader as an "android fork".