Mullvad vs Proton VPN: Which Is Actually Private?

Most VPN comparisons devolve into spec sheets. This one won't. Mullvad and Proton VPN are the two most credible privacy-focused VPNs available right now — both open source, both audited, both used by people who actually think about threat models. But they solve the problem differently, and picking the wrong one for your situation is a real mistake.

The short version: Mullvad is built around identity elimination. Proton is built around a trusted privacy ecosystem. If you want a provider that structurally cannot know who you are, that's Mullvad. If you want a full suite of privacy tools under one account with more features and a free tier, that's Proton. The rest of this article explains why that distinction matters more than any benchmark.

The privacy model: what "no logs" actually means

Every VPN claims no logs. The phrase has been so diluted by marketing that it's nearly meaningless on its own. What matters is the structural question: even if the provider wanted to hand over your data, what do they actually have?

Mullvad's answer is extreme by design. To create an account, you generate a random 16-digit number — no email, no name, no nothing. You can pay with cash mailed in an envelope, Bitcoin, or Monero. The account number is your only identifier, and Mullvad has no way to link it to you if you pay anonymously. This isn't a policy choice — it's a structural one. There's no identity to surrender because none was ever collected.

Proton's model is more conventional but still strong. You create an account with an email address (which can be a Proton Mail address you created anonymously), and Proton operates under Swiss privacy law, which is among the strictest in the world. They use RAM-only servers, meaning data doesn't survive a reboot. Their no-log policy has been audited multiple times and survived real-world legal pressure. But fundamentally, Proton knows your account exists. Mullvad structurally cannot.

For most threat models, Proton's approach is more than sufficient. For people who need or want zero linkage — journalists, activists, operational security practitioners, or anyone who just prefers the cleanest possible setup — Mullvad's identity elimination is genuinely different.

Audits

Both providers have accumulated serious audit records. Mullvad has been audited by Cure53, Radically Open Security, and Assured Security Consultants across its apps, infrastructure, and VPN servers. The most recent — an August 2025 penetration test by Assured — found zero critical, high, or medium-severity issues. One low-severity input validation issue was patched immediately. Mullvad also shipped GotaTun, a custom Rust-based WireGuard implementation forked from Cloudflare's BoringTun, which passed its own independent security audit in early 2026 with no major vulnerabilities found.

The real-world test came in early 2024 when Swedish police executed a search warrant on Mullvad's Gothenburg office. They found nothing, because there was nothing to find — no IP addresses, no traffic logs, no connection timestamps. That outcome is more useful than any audit report.

Proton VPN completed its third independent no-log audit in July 2024 via Securitum, who confirmed full compliance with their no-log policy and found no evidence of user activity being stored. Proton's apps are open source and have been separately audited. Their Secure Core server infrastructure also undergoes regular review. The audit cadence is consistent and the results have been clean.

WireGuard implementation

Both providers use WireGuard as their primary protocol, which is the right call — it's faster, leaner, and has a smaller attack surface than OpenVPN. But their implementations diverge in interesting ways.

Mullvad has gone deep on WireGuard. As of early 2026, they dropped OpenVPN support entirely and went WireGuard-only. They built GotaTun, their own Rust-based WireGuard implementation, to have full control over the stack. They've also deployed quantum-resistant tunnels by default on desktop — using Kyber-1024 key encapsulation to protect against harvest-now-decrypt-later attacks. And their DAITA feature (Defense Against AI-guided Traffic Analysis) adds packet padding and dummy traffic to make traffic analysis significantly harder. This is materially more sophisticated than what most VPNs offer.

Multihop on Mullvad routes your traffic through two separate servers in different jurisdictions before it exits. An adversary would need to correlate timing attacks across multiple points to de-anonymize you — a much higher bar than a single-hop connection.

Proton supports WireGuard alongside OpenVPN, IKEv2/IPsec, and their proprietary Stealth protocol. Stealth disguises VPN traffic as regular HTTPS, which is specifically useful for bypassing VPN blocks in restrictive countries or networks. Their Secure Core multi-hop routes traffic through servers in privacy-friendly jurisdictions (Switzerland, Iceland, Sweden) before exiting, serving a similar purpose to Mullvad's multihop but with named, owned infrastructure rather than rented servers.

Account model & payment

Mullvad: no email, no account linkage, random number. Payment options include credit card, PayPal, bank wire, Bitcoin, Monero, voucher codes, and cash by mail. €5/month flat, no annual discounts, no upsells. You pay for time on an account number. That's the entire relationship.

Proton: email required, but that email can be a Proton Mail address you set up without a phone number. Swiss jurisdiction. Free tier available with no credit card required — unlimited data, no speed caps, servers in 10 countries. Paid plans start at around $9.99/month for Plus. The account connects to the full Proton ecosystem: Mail, Drive, Pass, and Calendar all share the same account and encryption infrastructure, which is either a feature or a liability depending on your threat model.

The ecosystem angle is worth thinking about. If you're already using Proton Mail, consolidating into one trusted Swiss account is genuinely useful. If you want clean separation — VPN with no connection to anything else in your life — Mullvad's approach is cleaner.

Mullvad vs Proton VPN: side by side

Who should use which

Use Mullvad if: anonymity is your primary requirement and you want the structurally cleanest setup possible. Security researchers, journalists, anyone doing operational security work, or people who simply want a provider that literally cannot identify them. Also the right call if you prefer a minimal, no-ecosystem, no-upsell relationship with your VPN. The DAITA and quantum-resistance features are technically ahead of the field.

Use Proton VPN if: you want a full-featured VPN that works reliably for everyday use — streaming, browsing, travel, restrictive networks. The free tier is legitimately one of the few honest free VPN options in existence. If you already use Proton Mail or are building out a Swiss-hosted privacy stack, Proton VPN integrates naturally. The Stealth protocol is useful if you're in a country or on a network that actively blocks VPN traffic. NetShield's DNS-level ad and malware blocking is more polished than Mullvad's blocklist setup.

The one use case where neither is the obvious answer: streaming-first users who want to unblock every service in every region. Proton handles it better than Mullvad, but dedicated streaming-focused VPNs (NordVPN, ExpressVPN) are still more reliable for that specific use case. That's a deliberate tradeoff both providers have made.

Bottom line

These are the two most technically credible consumer VPNs available. The decision isn't about which one is better — it's about which privacy model fits your situation. Mullvad is for people who want to be structurally unknowable. Proton is for people who want a trusted provider with more features and a free entry point.

If you're reading this as someone who works in security or cares deeply about operational hygiene: Mullvad. The anonymous account model, DAITA, quantum resistance, and the 2024 police raid outcome put it in a different category for threat-sensitive use cases. For everyone else — including people who just want a solid, honest VPN that doesn't sell their data — Proton VPN is the easier recommendation.