Proton declared an incident on its status page at 15:35 CEST on July 10, 2026, affecting login across its service portfolio. The initial status read "Investigating," with the company stating: "We are aware of an incident, the team is working on investigating it." Proton Status

The outage is not confined to a single product. Proton Mail is affected across its Web Application, Bridge, Mobile Apps, and Desktop Apps. Proton Calendar's Mobile Apps and Web Application are impacted. Proton Drive is affected across Web, Mobile, and Desktop Apps, along with Proton Docs. Proton Pass is down across Mobile Apps and Browser Extensions, and Proton VPN is affected across Mobile and Desktop Apps and Browser Extensions. SimpleLogin, Proton Wallet, and Lumo — Proton's AI assistant — round out the list of affected services. Proton Status

That breadth is notable on its own terms. Proton's stack spans email, calendaring, cloud storage, password management, a consumer VPN, an email-alias service acquired in 2022, a crypto wallet, and a generative AI product. A login failure cutting across all of them points toward a shared authentication layer — likely Proton's centralized account and SSO infrastructure — rather than an isolated fault in any one client or app.

Proton posted follow-up updates at 15:38, 15:39, 15:40, and 15:42 CEST. As of the last of these, engineering teams remained in active investigation, working to restore normal access, with no resolution posted. Proton Status The status page itself runs on Atlassian Statuspage, the widely used third-party incident-communication platform that many SaaS vendors rely on to publish real-time updates independent of their own potentially-affected infrastructure. Proton Status

Worth flagging: at seven minutes past the initial declaration, the public record offers cadence but not root cause. Proton has not yet indicated whether the fault traces to an authentication microservice, a database or cache layer feeding session tokens, a certificate or key-rotation issue, a third-party identity dependency, or a deployment regression. Companies running centralized login for privacy-focused, end-to-end-encrypted services face a particular constraint here: because Proton's zero-access architecture means the company itself cannot decrypt user data, login failures tend to be pure availability incidents rather than data-exposure events, but that same architecture also means there is no shortcut around a broken authentication path — users locked out cannot fall back to alternate access methods that would compromise the encryption model.

For an operator whose entire value proposition rests on trust in a self-contained, privacy-first ecosystem, a login outage spanning encrypted email, VPN, password vault, and crypto wallet in a single sweep is a more consequential failure mode than the equivalent incident would be for a looser bundle of independent products. Users who rely on Proton Pass as their password manager and Proton Mail as their primary inbox lose both simultaneously if authentication is the shared point of failure — an operational reality that increases the pressure on Proton's team to isolate and communicate root cause quickly, even while the technical fix is still in progress.

In this author's view, the more interesting story here, assuming the incident resolves within the hour as most authentication-layer outages of this kind do, will be the postmortem: which specific dependency in Proton's login path proved to be the single point of failure, and whether the company's architecture — built explicitly to resist government subpoenas and third-party data access — has any structural blind spot when it comes to redundancy for its own account services. Proton has generally published transparent postmortems for past incidents, and this one will likely be scrutinized precisely because the affected surface area is so wide.

As of this writing, Proton has not published an estimated time to resolution, and the incident remains open on its status page. Brief will update this story as Proton posts further status changes.