You can never REALLY be sure, but from what I can tell mullvad is the most honest and sincere vpn company in the space and I wouldn't even consider going anywhere else. They started funding wireguard before it was cool and before anyone else gave a shit about wireguard. back then bitcoin was on the super fringe and the only people interested and involved in it where people that were ideologically aligned with it's vision. No matter what you think about crypto they were probably one of if not the first companies in the world to start accepting bitcoin in 2010 and have always self hosted their infrastructure, not offloading it to bitpay or whatever other company that just funnels right into chain analysis companies.

They don't use accounts or collect email addresses.

it's also first to step into new technology and infrastructure because they are truly interested and ideologically invested in what they are doing. Mullvad has a long history of proving itself as being a good faith actor in the space.

Mullvad vpn