Proton VPN backs its no-log claim with open code and 4 audits

Proton's answer is transparency. Anyone can inspect its app code to see what happens to traffic. The audits were carried out by the firm Securitum, the latest in 2025. Auditors examined the production infrastructure and confirmed there were no logs that could link activity to a user. The report is public.

Swiss jurisdiction and extra protection

Proton is based in Geneva and subject to Swiss law, regarded as among the most protective of privacy. The company began in 2014 with Proton Mail and launched its VPN in 2017. The optional Secure Core feature routes traffic through hardened servers in Switzerland, Sweden or Iceland before the final destination, so a compromised exit server never sees the real IP address. Tor routing is built into the app.

The free version shows no ads and does not cap data, as it is funded by paying subscribers. It is deliberately basic: one device, automatic country selection and no advanced options. VPN Plus adds 10 simultaneous devices, more than 20,000 servers in over 140 countries, streaming and P2P servers, and NetShield, which blocks ads, trackers and malicious domains.

A VPN has limits. It hides your IP address and encrypts your connection, for example on public Wi-Fi, but services you are logged into still know who you are, and it does not replace antivirus software. An audit is also a snapshot in time, which is why repeated audits and permanently open code carry more weight.

Black Friday pricing

Until 30 November, VPN Plus costs €2.49 a month on a two-year plan, or €59.76 paid once, versus €9.99 monthly without commitment. That is a 75% discount. The price is locked for 24 months, then renews at €83.88 a year. A 30-day money-back guarantee applies. Proton Unlimited, at €6.49 a month on a one-year plan, adds Proton Mail, Proton Pass, the calendar and 500 GB on Proton Drive.