Proton
Proton is a secure collaboration platform offering encrypted email, calendar, and document storage.

System Parameter Breakdown
- Free Plan:
- Yes
- Starting Price (Paid):
- 4.99 (USD/mo)
- Free Storage:
- 500 (MB)
- End-to-End Encryption:
- Yes
- Max Users (Business Plan):
- Unlimited
- Calendar Sharing:
- Yes
Proton provides end-to-end encrypted productivity tools including email, calendar, file storage, and document editing. It's designed for privacy-conscious professionals, businesses, and organizations that require secure communication and data protection without compromising on collaboration features.







