Overview
Proton VPN is a VPN service operated by the Swiss company Proton AG, the company behind the email service Proton Mail. According to its official website, Proton VPN and Proton Mail share the same management team, offices, and technical resources, and are operated from Proton's headquarters in Plan-les-Ouates, Switzerland.
Features
As of 16 May 2023, Proton VPN has a total of 2,914 servers, sited in 67 different nations.
Although ProtonVPN owns and operates a portion of their servers, the bulk majority are owned and operated by ASNs such as M247 and Datacamp Limited. Its service is available for Windows, MacOS, Linux, Android, and iOS, ChromeOS and also has a command-line tool for Linux and can be implemented using the IPSEC protocol. Proton VPN can also be installed on a Wireless Router.
Proton VPN utilizes OpenVPN (UDP/TCP), IKEv2, and WireGuard protocols with AES-256 encryption. On October 11, 2022, Proton VPN released their Stealth Protocol, designed to disguise VPN traffic as HTTPS traffic.
From Wikipedia (CC BY-SA 4.0).