Subject: Feature Request – Privacy-First Accounting/Bookkeeping Module for Proton Workspace

To Proton Product Team,

I am a long-time Proton user and supporter of your mission to build privacy-respecting alternatives to Big Tech. I'm writing to propose a significant expansion of the Proton Workspace ecosystem.

Current Gap:
Proton Workspace currently offers excellent encrypted communication and file storage, but lacks native financial/accounting capabilities. Businesses must use third-party US-based accounting software (QuickBooks, Xero, Zoho), creating data leakage points where sensitive financial information is exposed to entities that monetize user data through advertising and third-party sharing.

Proposal:
Develop an end-to-end encrypted accounting/bookkeeping module integrated with Proton Workspace featuring:

1. Invoice & Receipt Management

   • E2EE storage of all financial documents
   • OCR scanning with private AI processing (client-side or encrypted-server-side)
   • No metadata sold to advertisers or data brokers

2. Transaction & Expense Tracking

   • Bank API integrations with privacy-preserving protocols
   • Automated categorization using Lumo AI (trained only on user-consented data)
   • Zero-knowledge architecture ensuring Proton cannot access financial data

3. Customer Data Protection

   • Client PII encrypted with zero-access keys
   • GDPR-compliant data handling throughout
   • No third-party data sharing even for "analytics" purposes

4. AI-Powered Financial Insights

   • Private dashboard queries ("What were my top expenses last quarter?")
   • Cash flow projections without sending data to external servers
   • Tax preparation summaries generated locally or via encrypted API

5. Compliance & Interoperability

   • Multi-jurisdiction tax law support (EU VAT, US Sales Tax, etc.)
   • Export compatibility with existing formats for migration scenarios
   • Audit trails with cryptographic verification

Why Proton?
- Nonprofit structure eliminates incentive to monetize user financial data
- Swiss/EU jurisdiction provides stronger privacy protections than US competitors
- Existing trust relationship (users already store sensitive emails/files here)
- Technical expertise proven with Drive's encryption SDK

Business Model Consideration:
Premium tier add-on for Proton Workspace subscribers ($X/user/month), or bundled in Visionary plans.

Closing:
This expansion would position Proton as the first truly private, secure alternative to Intuit/QuickBooks for businesses that prioritize data sovereignty and privacy. I am willing to beta test such a module if development begins.

Thank you for considering this proposal. I believe there is significant market demand among privacy-conscious professionals, consultants, small businesses, and activists who currently have no fully encrypted accounting option.

Respectfully,
SunniDhaes