I presume you mean Google, Microsoft and Samsung. Further that you are some how worried about their influence on the Raspberry Pi Foundation, the various operating systems available for the Pi or applications.
If this is concern for you I have bad news for you. Microsoft and Google are among the biggest contributors to the Linux kernel. That is actual code never mind funding. I suspect Samsung is a kernel contributor as well.
Even more bad, Microsoft is a full paid up Platinum member of the Linux Foundation and board member. Which means they put in a lot of money every year and gain a lot of influence. As you perhaps know The Linux Foundation pays Linus Torvalds' salary. That's right MS pays the Linux kernel project leader !
There is nothing for it. To avoid such "Questionable actors" you will have to stop using Linux altogether. All the time, everywhere. Never mind the Pi.
Memory in C++ is a leaky abstraction .