Proton Product
Proton Duo
Proton Duo is a paid Proton subscription plan for two users who share 2 TB of storage and receive access to all Proton services and premium features. Proton describes it as a way to bring a family member or partner into the Proton ecosystem. It sits between the single-user Proton Unlimited plan and the six-user Proton Family plan.
Proton Duo is a Proton product filed under Email Client Software. Lifecycle: no published lifecycle.
Source: Proton plans explained: Proton Free, Proton Mail Plus, Proton Unlimited, Proton Duo, Proton Family, and Proton Visionary | Proton, retrieved 15 Oct 2026
Releases and Lifecycle
All Proton productsRelease and support dates as published by Proton; dates within the next 12 months are highlighted, past dates dimmed. Retrieved 2026-10-14.
- No published lifecycle 1
- Proton Duo