ProtonVPN releases source code and undergoes full security audit

Website
(Image credit: ProtonVPN)

From its onset, ProtonVPN has set out to be the most transparent and accountable VPN provider and now the company has backed up these claims by releasing its source code on all platforms and undergoing an independent security audit.

The VPN market has come under scrutiny recently as many free VPN apps have been found by security researchers to share user data, have poor implementations and suffer security lapses. Some free Android VPN apps have even been found to contain viruses and malware.

To reassure customers that their data is safe when using its VPN, ProtonVPN made the decision to release its source code on all platforms so that security experts could conduct an independent audit on its services and software. Undergoing a security audit is also a way for a VPN provider to test its security features while providing customers with more than just promises.

Why open source?

By open sourcing 100 percent of its client code, ProtonVPN is providing security experts worldwide with the chance to inspect is encryption implementations as well as how the company handles user data. Open source software is also more trustworthy than proprietary software because it can be independently scrutinized which means that potential vulnerabilities are identified and resolved quickly.

ProtonVPN also worked with the security firm SEC Consult on a full security audit that was able to verify the security of the company's software.

CEO and Founder of Proton, Dr. Andy Yen explained how the company can earn the trust of its customers by publishing its code, saying:

“VPN services can technically access some very sensitive user data, which is why users should choose services with a track record for transparency and security. This trust must be earned, and by publishing our code, we hope to demonstrate our commitment towards always going above and beyond when it comes to security and putting users first.”

  • Also check out our complete list of the best VPN services
Anthony Spadafora

After working with the TechRadar Pro team for the last several years, Anthony is now the security and networking editor at Tom’s Guide where he covers everything from data breaches and ransomware gangs to the best way to cover your whole home or business with Wi-Fi. When not writing, you can find him tinkering with PCs and game consoles, managing cables and upgrading his smart home. 

Latest in VPN Services
A hand holds a smartphone displaying the NordVPN logo
NordVPN Prime hits lowest-ever price in VPN Spring sale
ExpressVPN mobile app and Aircove
ExpressVPN ‘reduces workforce’ for the second time in two years
Harry Halpin, CEO and co-founder of Nym Technologies, and Chelsea Manning, Nym Technlogies' security consultant, on stage at the Frontline Club in London during the NymVPN launch on March 13, 2025.
NymVPN is now live – here's everything you need to know
Green background featuring laptop with connect button
I tried the "world's most secure VPN" and while it's not the VPN you'll want, you'll need it sooner than you think
A representational concept of a social media network
Living in the US? You can now measure your online data exposure for free
Surfshark Alternative Number running on an iPhone
How to use Surfshark Alternative Number to stop unwanted spam and scam calls
Latest in News
Zendesk Relate 2025
Zendesk Relate 2025 - everything you need to know as the event unfolds
Disney Plus logo with popcorn
You can finally tell Disney+ to stop bugging you about that terrible Marvel show you regret starting
Google Gemini AI
Gemini can now see your screen and judge your tabs
Girl wearing Meta Quest 3 headset interacting with a jungle playset
Latest Meta Quest 3 software beta teases a major design overhaul and VR screen sharing – and I need these updates now
Philips Hue
Philips Hue might be working on a video doorbell, and according to a new report, we just got our first look at it
Microsoft
"Another pair of eyes" - Microsoft launches all-new Security Copilot Agents to give security teams the upper hand