Transport Layer Security (SSL/TLS) can tunnel an entire network's traffic (as it does in the OpenVPN project and SoftEther VPN project) or secure an individual connection. A number of vendors provide remote-access VPN capabilities through SSL. An SSL VPN can connect from locations where IPsec runs into trouble with Network Address Translation and firewall rules.
With a presence in 148 locations across 94 countries, you also won’t need to worry about international travel. Furthermore, the more than 2,000 servers are all well placed throughout common travel destinations and urban centers. Any package will land you unlimited bandwidth and speed, a guaranteed 99.9 percent uptime, and 24-hour customer service. With so many guaranteed features, it’s no wonder this vendor is considered among the best — although note that ExpressVPN only supports up to three simultaneous connections, which is the least of the services on our list.
One basic test for a VPN service is to check how long a VPN client takes to connect to a VPN server and get online. For our 2018 reviews, we installed each vendor's VPN client software on an HP EliteBook x360 1020 G2 laptop running Windows 10, an iPad mini and a Samsung Galaxy S8 Android phone. (In 2017, we used a Lenovo ThinkPad X1 Yoga notebook, an Apple MacBook Air, a Samsung Galaxy S6 phone and the iPad mini.) We used each device with each VPN service we tested.