Yes, is safe to download and is widely considered one of the most secure and transparent VPN services available. It was developed by the same team of scientists at CERN behind Proton Mail and is governed by strict Swiss privacy laws. Security & Privacy Verification

Unlike many competitors, all Proton VPN apps are open source , allowing anyone to inspect the code for vulnerabilities or hidden "backdoors."

Yes. The Proton VPN Free plan is one of the few free VPNs that does not sell user data to advertisers. It offers and uses the same strong encryption as the paid tiers. The primary limitations are a smaller number of servers, slower speeds during peak times, and the lack of advanced features like Secure Core or streaming-optimized servers. Safe Download Practices

Routes traffic through multiple servers in privacy-friendly countries. Protects against sophisticated network attacks (Paid only). DNS-level ad, tracker, and malware blocker. Prevents malicious sites from loading (Paid only). Is the Free Version Safe?

Its no-logs policy was tested in court in 2019 ; the company was unable to provide user data to authorities because it simply did not exist.