Google Analytics alternatives for a b2b startup?

Piwik Pro (https://piwik.pro/) is a great privacy-first alternative.

I'm a fan of Matomo (https://matomo.org/), since you can use it on prem you can control where the data goes which is very B2B friendly

Big fan of Dreamdata.

Try Usermaven. It's highly intuitive and offers a free plan.