Proton Pass Plus costs $59.88 annually, before any discounts. For that, you get all the free tier's perks as well as an unlimited number of email aliases, the ability to generate multi-factor authentication (MFA) codes via the mobile apps, the option to create multiple vaults, vault sharing for up to 10 users, dark web monitoring, and the ability to enroll in Proton Sentinel (more on that feature later).