Proton VPN is a virtual private network service made by Proton AG in Geneva, Switzerland. Proton launched it in 2017, three years after it launched Proton Mail. The company was started by scientists who met at CERN, and a nonprofit foundation is now its main shareholder.
Proton VPN encrypts a device's traffic and sends it through a server in another country. It supports WireGuard, OpenVPN and its own Stealth protocol, which helps in countries that block VPNs. Secure Core routes traffic through extra servers in privacy friendly countries before it leaves the network. NetShield blocks ads, trackers and malware. The apps are open source, and Proton says it keeps no logs of user activity, a claim checked by outside auditors.
Proton VPN has a free plan with no data limit, but users cannot choose the server country and get fewer features. Paid plans unlock servers in many countries, faster speeds, streaming support and more devices. Proton Unlimited bundles the VPN with Proton Mail, Drive and Pass. Proton VPN runs on Windows, Mac, Linux, iOS, Android and some TVs and routers.