Proton VPN

What Is Proton VPN?

Every major VPN provider claims to be the most private, the most secure, the most trustworthy. None of them offer you their product for free with no strings attached. Except one.

Proton VPN is the only VPN service from a reputable provider that offers a genuinely unlimited free tier — no data caps, no bandwidth limits, no time restrictions, no advertising. You sign up, you connect, and your internet traffic is encrypted through servers in five countries. Forever. For free.

This is not a marketing gimmick or a 7-day trial dressed up as generosity. Proton VPN's free tier has been available since 2017, funded entirely by paid subscribers who choose to support the mission. The model works because Proton VPN is not a standalone VPN company trying to maximise user acquisition — it is part of Proton AG, the Swiss privacy company behind Proton Mail, built by CERN scientists with a stated mission to make privacy accessible to everyone.

Founded in 2017 as an extension of the Proton Mail infrastructure, Proton VPN has grown into a full-featured VPN service with over 4,000 servers in 90+ countries. Every application — Windows, macOS, Linux, iOS, Android — is open source under the GPLv3 license and has been independently audited by SEC Consult and Securitum. The no-logs policy is not a marketing claim; it has been verified in Swiss legal proceedings where Proton had no connection logs to provide.

Proton AG is headquartered in Geneva, Switzerland, and operates under the Swiss Federal Data Protection Act — one of the strongest privacy frameworks in the world. Switzerland has no mandatory data retention laws for VPN providers. Swiss constitutional law explicitly protects the right to privacy. This is not a jurisdiction of convenience like Panama or the British Virgin Islands — it is a jurisdiction of substance.

Key Features

The Free Tier

Proton VPN's free tier deserves its own section because it is genuinely unprecedented. You get unlimited data, no ads, and the same no-logs policy as paid plans. Servers are available in five countries: the United States, Netherlands, Japan, Poland, and Romania. You are limited to one device connection, medium speeds, and no streaming or P2P support.

For basic privacy needs — protecting your connection on public Wi-Fi, bypassing basic geo-restrictions, keeping your ISP from logging your browsing — the free tier is sufficient. It is funded by the same model as Proton Mail's free tier: paid subscribers subsidise free access because privacy should not be a luxury.

The catch is real but proportionate: speeds are medium (not throttled, but lower priority than paid servers), you cannot use it for Netflix, and one device at a time is limiting for households. But compared to every other "free VPN" — which are either data-capped trials, ad-supported surveillance tools, or outright malware — Proton VPN Free is in a category of one.

Secure Core Architecture

Secure Core is Proton VPN's answer to the question: what if the exit server is compromised? In a standard VPN connection, your traffic goes from your device to the VPN server, then to the internet. If the VPN server is monitored (by a government, an ISP, or a compromised data centre), your traffic pattern — if not your content — can be observed.

Secure Core routes your traffic through servers in privacy-friendly jurisdictions (Switzerland, Iceland, Sweden) before it reaches the exit server. Even if the exit server is compromised, the attacker sees only that the traffic came from a Secure Core country — not your actual location. It is essentially a double-hop VPN with jurisdictional intelligence.

The tradeoff is speed: Secure Core adds latency. For everyday browsing, you will not notice. For gaming or video calls, you might.

Open Source and Audited

Every Proton VPN application is open source under GPLv3. The code is available on GitHub for anyone to inspect. Independent security audits have been conducted by SEC Consult (2019, 2022) and Securitum (2023, 2024), with published reports covering the Windows, macOS, Linux, iOS, and Android clients. The core VPN libraries are also open source.

This level of transparency is rare in the VPN industry, where most providers ask you to trust their no-logs claims without providing any way to verify them. Proton VPN's approach — open source code, independent audits, Swiss jurisdiction — provides multiple layers of verifiable trust.

NetShield Ad and Tracker Blocker

NetShield, available on paid plans, blocks ads, trackers, and malware at the DNS level. It operates on the VPN server, meaning it protects all traffic from your device without requiring a browser extension or local software. Three levels are available: malware blocking only, malware plus tracking, and malware plus tracking plus ads.

NetShield is not a replacement for a comprehensive ad blocker like uBlock Origin, but it provides baseline protection across all applications — including mobile apps where browser-based blockers do not work.

VPN Accelerator

Proton VPN's VPN Accelerator technology uses a combination of protocol optimizations to improve connection speeds, particularly over long distances. Proton claims speed improvements of over 400% on certain routes. In practice, the improvement varies, but VPN Accelerator does meaningfully reduce the speed penalty associated with connecting to distant servers.

Pricing

Proton VPN's pricing structure is straightforward, with significant discounts on longer commitments.

Free costs nothing and provides unlimited data, servers in 5 countries, 1 device connection, and medium speeds. No ads, no logs, no catch. This is the tier you should start with to evaluate whether Proton VPN works for your connection and use case.

VPN Plus costs EUR 9.99/month, or EUR 4.99/month on an annual plan, or approximately EUR 4.49/month on a 2-year plan. You get 4,000+ servers in 90+ countries, 10 simultaneous device connections, streaming and P2P support, Secure Core, NetShield, and VPN Accelerator. For most users, this is the tier to be on.

Proton Unlimited at EUR 9.99/month (annual) bundles VPN Plus with Proton Mail Plus, Proton Drive, Proton Calendar, and Proton Pass. If you are already using or considering Proton Mail, Unlimited is better value than subscribing to VPN Plus and Mail Plus separately.

Compared to the competition: Surfshark is cheaper on long-term plans (EUR 3.19/month for 2 years) and offers unlimited devices. ExpressVPN is more expensive at approximately EUR 8.32/month annually. NordVPN's 2-year plan lands around EUR 3.69/month. Proton VPN's mid-range pricing is justified by its open-source transparency, Swiss jurisdiction, and the only genuinely free tier in the market.

EU Compliance & Data Privacy

Proton AG operates under Swiss law, which provides privacy protections that in several respects exceed those of the EU's GDPR. The Swiss Federal Data Protection Act does not require VPN providers to retain connection logs. Swiss constitutional law explicitly protects the right to privacy. There are no intelligence-sharing agreements comparable to Five Eyes, Nine Eyes, or Fourteen Eyes — Switzerland is not a member of any of these alliances.

Proton VPN's no-logs policy has been tested in legal proceedings. When Swiss authorities have requested connection data, Proton has had nothing to provide — not because of a policy decision, but because the data does not exist. The architecture is designed to not retain identifying information.

For European businesses and individuals, Proton VPN's Swiss base provides jurisdictional separation from both US surveillance (CLOUD Act, FISA) and EU-level data retention requirements that some member states impose. Switzerland has an EU adequacy decision, meaning it is recognised as providing adequate data protection for the purposes of cross-border data transfers.

The open-source codebase and published audit reports provide verifiable privacy — a standard that no closed-source VPN provider can match.

Who It's Best For

Privacy-conscious users on a budget who want a reputable, no-logs VPN without paying anything — Proton VPN's free tier is the only ethical option in the free VPN market.

Security professionals and journalists who need verifiable privacy guarantees backed by open-source code, independent audits, and Swiss jurisdiction.

Proton ecosystem users already on Proton Mail who want VPN protection integrated with their existing account and potentially bundled via Proton Unlimited.

European businesses needing a VPN provider outside EU and US jurisdiction but with recognised privacy adequacy, providing an additional layer of separation from government data requests.

The Verdict

The VPN market is crowded with providers making identical claims about privacy, speed, and security. Most of these claims are unverifiable. Proton VPN is different — not because its marketing is better, but because its evidence is better. Open-source code you can read. Independent audits you can download. A no-logs policy tested in court. Swiss jurisdiction with constitutional privacy protections. And a free tier that proves the company means what it says about making privacy accessible.

Proton VPN is not the fastest VPN. It is not the cheapest paid VPN. It does not have the most servers. But it is the most trustworthy VPN — and in an industry built on trust, that is the only metric that ultimately matters.

Frequently Asked Questions

Is Proton VPN really free?

Yes. Proton VPN's free tier provides unlimited data, no ads, and the same no-logs policy as paid plans. You get servers in 5 countries and 1 device connection. There are no bandwidth caps or time limits. The free tier is funded by paid subscribers.

Is Proton VPN safe and trustworthy?

Proton VPN is operated by Proton AG in Switzerland. All apps are open source under GPLv3 and independently audited by SEC Consult and Securitum. The no-logs policy has been verified in legal proceedings. Switzerland has no mandatory data retention laws for VPN providers.

How does Proton VPN compare to NordVPN?

Proton VPN offers stronger transparency (open-source apps, published audits), a genuinely free tier, and Swiss jurisdiction. NordVPN has faster speeds, more server locations, and features like dedicated IPs and Meshnet. NordVPN is based in Panama; Proton VPN is Swiss.

Does Proton VPN work with streaming?

Proton VPN Plus works with many major streaming services on streaming-optimized servers. The free tier does not support streaming. Performance varies by service and region, and streaming platforms actively work to block VPN connections.

Can I use Proton VPN and Proton Mail together?

Yes. The Proton Unlimited plan (EUR 9.99/month annually) includes Proton VPN Plus, Proton Mail Plus, Proton Drive, Proton Calendar, and Proton Pass. You can also subscribe to Proton VPN Plus independently.