VPNBook is described as 'Our free VPN (Virtual Private Network) server is designed with the latest technologies and most advanced cryptographic techniques to keep you safe on the internet from prying eyes and hackers. Our VPN securely routing all your internet traffic through an encrypted tunnel to' and is a VPN service in the security & privacy category. There are more than 100 alternatives to VPNBook, not only websites but also apps for a variety of platforms, including Windows, Mac, Android, iPhone and iPad apps. The best VPNBook alternative is Proton VPN, which is both free and Open Source. Other great sites and apps similar to VPNBook are Mullvad, Windscribe, Psiphon and Shadowsocks.