ProtonVPN Completes Independent Security Audit
Table of Contents
On September 2, 2026, ProtonVPN published the full report of a new independent security audit β its fourth consecutive year commissioning third-party review of core infrastructure. In an industry where "no-logs" promises keep falling apart, a publicly downloadable, line-by-line checkable audit carries more weight than any ad copy. This round's conclusion: no technical implementation violating the no-logs policy was found.
1. What Did the Audit Check?
The audit was performed by an independent European security firm across three layers: server-side log configuration, confirming no connection timestamps, real IPs or DNS queries are recorded; client code, checking for silent data-reporting backdoors; and Secure Core relay node data retention. The team got read-only infrastructure access and operated independently, without ProtonVPN interference.
2. What Do the Results Prove?
The report showed all inspected servers had no connection logging, the client code contained no undeclared data collection, and Secure Core nodes retained no user data. The auditors also verified the Kill Switch logic, confirming it truly cuts all traffic at the moment of disconnection, with no plaintext leak window.
| Audit Item | Checked | Result |
|---|---|---|
| Server logs | Connection/IP/DNS recording | Not recorded |
| Client code | Silent reporting | Not found |
| Secure Core | Relay data retention | None |
| Kill Switch | Cuts traffic on drop | Confirmed |
3. The Value of Certification for Users
For non-technical users, an audit's value is turning trust into verification. You don't need to read every line of code β just know an independent third party checked for you, with the full report public and conclusions checkable. This solves the VPN industry's core trust problem: a vendor claims no-logs, but who proves it?
| Trust Method | Relies On | Verifiability |
|---|---|---|
| Vendor self-claim | Vendor credit | Low |
| Media reviews | Third-party word | Medium |
| Independent audit | Third-party firm | High |
"Auditing is not the destination, but the starting point of long-term trust. We welcome anyone to check again every year." β ProtonVPN, at the report release.
A privacy-focused lawyer mentioned that when doing supplier compliance review for a corporate client, ProtonVPN was one of the few VPN providers that could produce a complete audit report on the spot β directly influencing the client's purchasing decision. This shows audit value has moved beyond individuals into enterprise procurement compliance.
Back to the opening question: is a vendor's privacy promise trustworthy? When it's written into a downloadable, checkable audit report, the answer gains ground. To learn ProtonVPN's full security mechanism, do a free vpn download from the ProtonVPN official site and read the published audit report in full.
