I’d say the likelihood of an American Big Tech without CIA covert operatives working there is essentially zero, even if there’s no direct cooperation. It doesn’t make sense to not utilize some of your most valuable assets.
Back in the 70s to 90s the CIA had presidents of Mexico as operatives (see LITEMPO). So, I wouldn't be surprised that nowadays some high level people at Google, Microsoft, etc are CIA assets.
Similarly, the KGB (as later exposed by VENONA) had their fingers in extremely sensitive pies during the early cold war period.
I find stuff like this very interesting and hadn't heard of LITEMPO before, thanks!
From another point of view, we can see American Big Tech and CIA (and some other agencies) as the two faces of a same coin : america leadership, as usa are raising their power from economical and cultural supremacy over other country. I may have a blurry foreigner (french) view on your country, but I really see this intrication as real and substential as it was in URSS. In a much robust way, of course, making your country so powerfull.