Proton VPN review: the most trustworthy VPN you can also start for free

Proton VPN is a subscription VPN from Proton AG, the Geneva company behind Proton Mail. Scientists who met at CERN founded it in 2014. Its largest shareholder is the non-profit Proton Foundation, and it has no venture-capital investors (Proton, About). The service encrypts traffic between your device and Proton’s servers, which numbered more than 20,000 in 149 countries on its server page in October 2026.

On the Cybernock research rubric Proton VPN scores 9.1/10 and ranks first in our best VPN list. Two findings decide that. It leads on privacy and trust, the criterion we weight most heavily. And it renews for less than NordVPN or ExpressVPN. Few paid VPNs also offer a free tier without a data cap.

How strong is Proton VPN’s privacy record?

Strong, and better documented than most rivals. Securitum has audited Proton VPN’s no-logs policy five years in a row, from 2022 to 2026. Every Proton VPN app is open source, so anyone can read the code running on your device.

The latest audit took place on-site in Zürich in May 2026 and covered free and paid servers. Auditors found no logging of browsing activity, DNS queries or connection metadata (Proton no-logs audit page). Proton’s transparency report lists 59 legal orders concerning the VPN in 2025. It rejected all of them, having no activity logs to hand over. A bug bounty pays up to $100,000 for serious flaws.

Swiss jurisdiction helps, with one caveat. In 2021, Swiss authorities compelled Proton Mail, a separate product, to log and hand over the IP address of a French climate activist. That case involved email, not the VPN. Still, it proves Proton must obey binding Swiss orders. In August 2025 Proton said it would move most of its physical infrastructure out of Switzerland because of a proposed surveillance ordinance, while keeping its Geneva headquarters. The Swiss justice department paused that revision in February 2026 for an outside impact assessment. The risk is on hold, not gone.

Which Proton VPN features matter most?

• Secure Core: routes your traffic through a first server in a privacy-friendly country before it exits, so a watched or seized exit server never sees your real IP address.
• Stealth: Proton’s own protocol wraps WireGuard inside TLS, which helps on hotel, school and office networks that block VPNs.
• NetShield: a DNS-level blocker for ads, trackers and known malware domains.
• Tor over VPN, split tunneling and a kill switch on the desktop and mobile apps.

In practice, Stealth is the setting to reach for when a network blocks ordinary VPN traffic. Secure Core costs some speed, so save it for when you need the extra hop.

VPN Plus covers 10 devices at once. Apps exist for Windows, macOS, Linux (with a full graphical app), iOS and iPadOS, Android, Chromebook, Android TV, Apple TV and Fire TV, plus Chrome and Firefox extensions. Router firmware is missing from Proton’s download page. If you’ve built your home network around a VPN router, expect more manual setup than with ExpressVPN.

The clearest gap is post-quantum encryption. Proton’s April 2026 roadmap describes a new WireGuard codebase that lays the groundwork, but nothing has shipped (Proton roadmap). NordVPN, Mullvad, Surfshark, ExpressVPN and Windscribe already offer post-quantum key exchange. For most people today, that’s a future-proofing issue rather than an active weakness.

Is Proton VPN’s free plan worth using?

Yes, for basic protection on one device. There’s no data limit and no ads. In exchange you get one device, a server Proton picks from 10 countries, and medium speed. Fine for a phone on café Wi-Fi. Too thin for a family.

That remains the most generous free tier among the VPNs we rank. Windscribe lets you choose from 10 countries but caps you at 10 GB a month. Free VPN apps of unknown ownership carry real risk: the Tech Transparency Project found in 2025 that 20 of the top 100 free VPN apps in the US App Store belonged to companies in mainland China or Hong Kong without clearly saying so. Proton’s free tier is funded by paying subscribers, not ads or data sales. Don’t trust a free VPN that can’t tell you who pays for it.

How much does Proton VPN cost?

VPN Plus costs $3.49 a month on the 2-year plan, billed $83.76 upfront. It then renews at $83.88 a year ($6.99 a month). When you budget, remember the $3.49 rate ends after two years. The 1-year plan is $3.99 a month and monthly billing is $9.99. These US prices appeared on Proton’s pricing page in October 2026.

Buy the 2-year VPN Plus plan unless you already pay for a password manager or encrypted email. Proton Unlimited adds Proton Mail, Drive and Pass for $36 a year more than VPN Plus at renewal. If you’d otherwise pay separately for two of those, the bundle wins. Skip the monthly plan. Twelve months at $9.99 come to $119.88, more than the $83.76 the 2-year plan bills for two full years.

During October 2026 the comparison section of the pricing page also showed a coupon price of $2.99 a month, so the checkout figure can dip below the list price. Proton’s terms give a full refund if you cancel within 30 days of your first purchase, once per user.

Where does Proton VPN fall short?

• No post-quantum encryption yet, while five of the VPNs in our ranking already offer it.
• Swiss law is in flux, and Proton has already moved infrastructure in response.
• The free plan picks your server country for you and covers only one device.
• The intro price roughly doubles at renewal, from $3.49 to $6.99 a month.

How does Proton VPN compare with NordVPN, Mullvad and Surfshark?

NordVPN matches Proton on audits and adds post-quantum encryption plus a malware-blocking antivirus suite. It renews at $139.08 a year, though, against Proton’s $83.88. Mullvad goes further on anonymity, with no email, cash payments and one flat price, but its network is much smaller and it stops at five devices. Surfshark suits big households thanks to unlimited devices. NordVPN and Surfshark share a holding company, Nord Security, so they aren’t fully independent rivals.

Who should not buy Proton VPN?

Proton is the wrong tool in four situations.

• Households with more than 10 devices. VPN Plus stops at 10 connections; Surfshark and Private Internet Access allow unlimited devices.
• Anyone who needs post-quantum key exchange now. Proton’s is still on the roadmap. NordVPN and Mullvad ship it today.
• Router-first setups. With no router firmware on the download page, ExpressVPN is the easier fit.
• People who want to pay without an email address. Mullvad takes cash and never asks for an email.

Should you buy Proton VPN?

For most people who rank privacy first, yes. The case rests on evidence you can check: five consecutive no-logs audits, open-source apps, a large network and a fair renewal price. Start on the free plan. Move to the 2-year VPN Plus plan when you need more countries, more devices or Secure Core.

The answer changes in three cases. If you want post-quantum protection and a built-in malware blocker now, choose NordVPN. If you want to pay in cash with no email attached, choose Mullvad. If you need to cover more than 10 devices, choose Surfshark or Private Internet Access. See the full VPN ranking or browse all VPN reviews.