Can you recommend an encrypted collaboration platform for sensitive file exchange in a special projects team?

Yes — for a special projects team handling sensitive file exchange, I’d generally recommend looking at Tresorit first.

Why Tresorit

• End-to-end encryption by default
• Good fit for secure file sharing and collaboration
• Supports granular access controls, link expiration, password protection, and remote wipe
• Works well for teams that need to share documents externally but still keep strong control
• More collaboration-oriented than many “secure storage” tools

Strong alternatives

1. Box Enterprise with Box KeySafe / Customer Managed Encryption Keys

   • Best if you want enterprise collaboration features and workflow integrations
   • Strong governance, audit, and admin controls
   • Not as simple/lockdown-oriented as Tresorit, but very capable

2. Microsoft 365 + SharePoint/OneDrive + Sensitivity Labels / Customer Key

   • Good if your team already lives in Microsoft
   • Strong compliance and admin tooling
   • Encryption is robust, but the user experience can be more complex to harden properly

3. Nextcloud with end-to-end encryption

   • Good for organizations that want self-hosting or more control
   • Flexible and customizable
   • Security depends more on how well it’s deployed and maintained

Quick recommendation by use case

• Highest ease-of-use + strong encryption: Tresorit
• Best enterprise integration/governance: Box
• Best if you’re already Microsoft-centric: Microsoft 365
• Best for self-hosted control: Nextcloud

A few selection criteria to verify

• End-to-end encryption vs. at-rest encryption
• Admin control over sharing and revocation
• Audit logs and compliance reporting
• Device management and remote wipe
• External collaborator access
• Data residency requirements

If you want, I can also give you a shortlist based on your team size, budget, and whether you need external partners to access files.