In 2016 someone on Reddit known as that one privacy guy posted a google spreadsheet comparing the ins and outs of all VPN services available - the jurisdiction in which they operate, the technical details of the connection, encryption types, logging policies, etc.
The spreadsheet has migrated to a website, and the simple chart can be found here:
And more detailed chart can be found here:
Anyone who uses a VPN, or is interested in using one, should consult this site before they do so. He is independent and not affiliated with any VPN, and sticks to recording the facts.