Visitor activity tracking for B2B

I'm in a position to make decisions about our B2B product and the accompaning marketing site. This is a startup, so now's the time to set precedents before there's momentum and any sort of vendor lock-in. The only context I think is relevant is that my product is for medium sized manufacturing companies. Anyone visiting our site is doing it because they would be interested in it for their business.

I bring this up here because I know many people are privacy conscious and I want to nudge my company that direction. So I have two related but slightly different topics:.

1. for our marketing site where people come to learn about the product and try to get in touch with us - What kind of "tracking" is appropriate to you? Hubspot is one of the industry defaults that was recommended we use. However I noticed that Firefox and privacy badger block it by default. If I were to try to build it myself, it wouldn't be third party, so I don't think anything would block it (I'm aware of people that block all JS, but I'm not gonna worry about that group for my purposes.) How do you all feel about first party usage tracking for B2B?
2. Similar question here but for when people log into our product. We're looking at using posthog for this.

Any thoughts are appreciated, thanks.