If you want privacy guarantees do not install or use anything connected to the internet. Even HN - with stylometry and a motivated actor it's easy to correlate your username here with any other publicly written text. An even more motivated actor could do this with privately written text (you know, all of those data breaches).

Stay offline for your safety.

This is obviously unrealistic for many in the modern era. So now the question is - regardless of how much or what is collected, which companies are least likely to sell you out, by any means? By pretty much any criteria Apple is near the top of that list. Though, they're not the very, very top. Companies like Mullvad offer services in a way such that nothing is collected at all, and since you can pay cash in theory no way to come back to you.

Personally, for me - it's more important to think about whether or not you trust the organization you're dealing with, than whether or not they're collecting stuff or not. Of the big tech companies I'd say I trust Apple the most from their track record, but I am not under any illusion that I have absolute privacy while using Apple products, and neither should you.