ProtonMail Dark Web — Official Onion Link & Guide (2026)

What Is ProtonMail’s .onion Address?

ProtonMail is the world’s most widely used end-to-end encrypted email service. It operates an official .onion address that provides an additional layer of anonymity on top of its existing privacy protections — when you access ProtonMail via its Tor address, your IP address is hidden from Proton’s servers entirely.

ProtonMail was founded in 2013 by scientists at CERN and MIT. Its servers are located in Switzerland, which has some of the strongest privacy laws in the world and is outside the jurisdiction of US and EU data requests. It cannot read your emails due to end-to-end encryption — not even Proton employees have access to message content.

Onion Address

Clearnet version: https://proton.me

Verification: This address is published in Proton’s official documentation and has been stable since launch. It is one of the most reliably verified .onion addresses available.

How to Access ProtonMail via Tor

1. Download Tor Browser from torproject.org
2. Set security level to Safer — ProtonMail requires JavaScript for its interface
3. Paste the .onion address into the address bar
4. Log into your existing account or create a new one

Note on JavaScript: ProtonMail’s web interface requires JavaScript to function. This means you cannot use Safest security mode with ProtonMail — set Tor Browser to Safer instead. Be aware that enabling JavaScript increases your browser fingerprint surface compared to Safest mode.

Alternative: ProtonMail’s mobile app (Android and iOS) can be configured to route traffic through Tor using Orbot, which avoids the JavaScript limitation of the web interface.

What the .onion Address Adds to ProtonMail’s Privacy

Creating an Anonymous ProtonMail Account

Creating a ProtonMail account via its .onion address from the start — before ever connecting to Proton from a clearnet browser — means Proton never has a real IP address associated with your account. This is significantly more private than creating an account on the clearnet and then switching to the .onion address later.

For maximum anonymity when creating a new account:

• Use Tor Browser to access the .onion address — not the clearnet site
• Choose a username with no connection to your real identity
• Do not verify with a phone number — ProtonMail offers phone-free registration on the free tier, though it may prompt for verification during account creation
• Do not recover the account with an existing email address linked to your identity
• If phone verification is required, use a number not linked to your identity

ProtonMail’s Privacy Limitations

The 2021 IP logging incident. In 2021, ProtonMail complied with a Swiss legal order requiring it to log the IP address of a French climate activist. This was possible because the activist used ProtonMail via its clearnet address — Proton could see their real IP. Had they used the .onion address, there would have been no IP to log. This incident is the clearest real-world demonstration of why the .onion address matters.

Metadata is not encrypted. ProtonMail encrypts message content but not all metadata. The fact that you emailed a specific address, when, and how often may be visible to Proton and potentially to law enforcement through legal process. Subject lines of emails sent to non-ProtonMail users are also not encrypted end-to-end.

Emails to non-ProtonMail users are not end-to-end encrypted by default. When you email someone on Gmail, Outlook or any other provider, the message leaves ProtonMail’s encrypted environment and travels over standard email infrastructure. End-to-end encryption only applies to email between ProtonMail accounts, or when using PGP with external contacts.

ProtonMail vs. Alternatives

Frequently Asked Questions

Is ProtonMail truly anonymous?

ProtonMail via its .onion address is among the most anonymous email options available for general users. It hides your IP from Proton, encrypts message content and is based in Switzerland. It is not perfectly anonymous — metadata remains accessible through legal process, and content encryption only applies between ProtonMail users by default. For the highest level of anonymity, combine ProtonMail’s .onion with a fresh account created entirely over Tor.

Can I use ProtonMail on my phone via Tor?

Yes. Install Orbot on Android and enable VPN mode to route all traffic through Tor, then use the ProtonMail app normally. On iOS, use the Onion Browser with ProtonMail’s mobile web interface via the .onion address — the native app cannot be routed through Tor on iOS without Orbot, which has limited iOS support.

What happened with ProtonMail and the French activist?

In 2021, Swiss authorities passed a legal order to ProtonMail requiring it to log the IP address and browser fingerprint of a French climate activist who used ProtonMail’s clearnet service. ProtonMail complied — Swiss law required it to. The activist’s real IP was handed to French authorities. Had the activist used ProtonMail’s .onion address, no real IP would have been available to log or hand over. ProtonMail subsequently made IP logging opt-in rather than default.

Does ProtonMail work with PGP?

Yes. ProtonMail supports PGP for encrypted communication with external contacts who use standard email clients. You can import your existing PGP key or use the key ProtonMail generates for your account. When emailing a PGP-enabled contact outside ProtonMail, messages are encrypted end-to-end even though they leave ProtonMail’s environment.

Is the free tier sufficient?

For most privacy-focused users, yes. The free tier provides 1GB of storage, one email address and access to all core features including end-to-end encryption and .onion access. Paid tiers add storage, custom domains, aliases and priority support. The free tier has no advertising and no data monetization.