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There are only two good ones are both based in Sweden. Mullvad gets a lot of hype but just as good is https://ovpn.se
OVPN also has been proven in Swedish court system by winning a court case that The Pirate Bay was behind their network and movie companies wanted their data. The whole case was hilarious and the movie company really tried to squeeze out something that wasn't there. They got nothing in the end and had to pay OVPNs court costs. On top of that it created praxis that it will be much harder for Swedish VPN companies to get subpoenaed or raided in the future, which we saw in the recent Mullvad raid. The Swedish police knew there was nothing to get, but the German police didn't.
https://www.ovpn.com/en/blog/ovpn-wins-court-order
I think they get way to little attention in the privacy discussion forums. They also never rent hardware (like Mullvad does), they run their diskless servers on OVPN owned hardware in colocation datacenters.
They also accepts cash just as Mullvad and another very nice thing is that they provide a service where you can get a public IPv4 address with all ports open for your server needs.