A Unified Proton Desktop App with Lumo at the Center

I would love to see Proton eventually move toward a single, unified Proton desktop application that brings the entire Proton ecosystem together in one interface, with Lumo as a persistent, context-aware AI assistant.

Instead of having separate desktop apps or browser tabs for Mail, Drive, Calendar, Docs, Sheets, Pass, VPN, etc., the user could have one central Proton application.

Proposed interface

The app could have a left sidebar containing all Proton services:

• Lumo
• Mail
• Calendar
• Drive
• Docs
• Sheets
• Slides
• Pass
• VPN
• Account / Settings
• Other Proton services

The currently selected service would open in the main area.

On the right side, Lumo would remain available as a collapsible sidebar.

For example:

Drive → full Drive interface in the center + Lumo sidebar on the right.

Sheets → full Sheets interface in the center + Lumo sidebar on the right.

Mail → full Mail interface in the center + Lumo sidebar on the right.

The user could expand or collapse Lumo whenever needed.

Lumo should understand the current context

This would become much more powerful if Lumo could, with explicit user permission, work with the service currently being used.

For example:

“Summarize this email and create a reply draft.”

“Analyze this spreadsheet and show me the most important trends.”

“Turn these notes into a structured document.”

“Create a presentation from this document.”

“Find the relevant files in my Drive and summarize them.”

Eventually, Lumo should also be able to work across Proton services:

“Take the information from this email, create a Calendar event, and save the relevant attachment to my Drive.”

Every action should be permission-based and opt-in, with users being able to control what Lumo can read or modify in each Proton service. Sensitive actions such as sending emails, deleting files, or modifying important data should require explicit confirmation.

Why I think this would be extremely valuable

Lumo currently has a lot of potential, but simply having another AI chat interface is not enough to compete with the larger AI platforms.

Proton has something much more interesting: an entire privacy-focused ecosystem.

Instead of trying to compete only on model intelligence, Lumo could become the private AI layer connecting the entire Proton ecosystem.

The goal would be something similar to the integrated AI experience in Google Workspace, but with Proton's privacy and security principles:

One Proton app → all Proton services → one persistent Lumo assistant → user-controlled permissions.

I believe this could make Lumo dramatically more useful for everyday productivity and would give Proton a very strong differentiator compared with standalone AI assistants.

I would especially love to see this become the long-term direction of the Lumo desktop app.