Proton Pass Plus is a cybersecurity service that allows users to protect their primary email address by using email aliases. These aliases act as temporary email addresses that can be used to sign up for websites or receive communications without revealing the user's main email. The alias is linked to the primary email but remains hidden from the websites where it is used. If a data breach occurs, only the alias is exposed, allowing users to create a new one and reduce the risk of further exposure. Proton Pass Plus is available for a first-month trial at 1 euro, with monthly and annual subscription options. The monthly plan costs 4.99 euros, while the annual plan is 2.49 euros per month. The service includes unlimited storage, end-to-end encryption using AES-256, and features like Pass Monitor, which alerts users to potential threats to their online identities. It also identifies websites that lack multi-factor authentication (2FA) and allows users to enable it directly from the app. Proton Pass Plus is part of Proton AG's suite of privacy-focused tools, which are built around strong cybersecurity principles. The company follows a no-logging policy and operates under privacy-respecting laws. Users can manage an unlimited number of passwords and store them in up to 50 different "safes" for better organization. The Proton Pass application is available on Windows, macOS, and Linux, offering features like offline secure mode and advanced email alias management. However, the browser extension is noted to have some limitations, particularly when dealing with complex forms or changing identifiers. The mobile version of Proton Pass is described as smooth and user-friendly, while more advanced data management is better suited for desktop users. Proton AG provides customer support in English through chat and email, available 24/7. The company also offers a 30-day satisfaction guarantee, allowing users to request a refund if they are not satisfied with the service.