ProXPN AnandTech VPN Of these three choices, ProtonVPN is the clear victor if you must use a free VPN. Opera’s offering isn’t a true VPN on the desktop, doesn’t work on mobile, and has questionable statements in its privacy policy. Betternet is the slowest of the three options, and lies on its homepage about showing ads. While ProtonVPN only allows access to a few servers and limits you to one device at a time, it has a commitment to privacy and never shows ads. 7 Best VPNs to Use in the UK in 2018 "domain": '',