Mullvad.

It has been proven in a court of law that when Mullvad says "no logging", they mean it.

They also regularly have security audits and publish the results[2][3]

[1]https://mullvad.net/en/blog/mullvad-vpn-was-subject-to-a-sea... [2]https://mullvad.net/en/blog/new-security-audit-of-account-an... [3]https://mullvad.net/en/blog/successful-security-assessment-o...