ExpressVPN is a paid premium service many swear by, while VPNBook offers a free service with mixed reviews. ExpressVPN consistently ranks as a leading VPN thanks to super-fast speeds, the ability to watch Netflix, and military-grade security. VPNBook is a completely free service that doesn’t cap bandwidth and offers strong encryption. But, you’re limited to six servers that are all monetized by ads. Keep reading to discover more of the differences between these two.