ProtonMail

Is ProtonMail down? Proton Mail is an end-to-end encrypted email service founded in 2013 by scientists from CERN, headquartered in Geneva, Switzerland. It is part of the broader Proton privacy ecosystem which includes Proton VPN, Proton Drive, Proton Calendar, and Proton Pass. Proton Mail uses zero-knowledge encryption, meaning Proton itself cannot read user emails — a design that appeals strongly to privacy-conscious users, journalists, activists, and businesses that need confidential communications.

Proton Mail has grown to over 100 million registered accounts, positioning itself as the privacy-respecting alternative to Gmail and Outlook. Its open-source cryptography and Swiss privacy law protections have made it the email platform of choice for users who distrust centralized providers. Proton was notably targeted by a large DDoS attack in 2015 — an incident that led to the company investing heavily in DDoS mitigation infrastructure.

Proton Mail is down or not working — users commonly report login failures on the Proton web interface or mobile app, sent emails being delayed in the outbox, the inbox failing to load or showing stale messages, Proton Bridge (the IMAP client integration) losing its connection, or end-to-end encryption key exchange failures when sending to other Proton users. Because Proton encrypts mail server-side, server availability is directly tied to email access.

If Proton Mail is down, Outage.gg tracks Proton Mail server status and outage history in real time. If Proton Mail is not loading or your emails are stuck, check the live status page for current incident information and get notified when full encrypted email service is restored.