Share a retrieval link
Give the intended recipient the drop link through a route you trust.
Dead Drops
An encrypted handoff with a limited life.
Send a message or file as an encrypted drop instead of starting a lasting conversation. Choose the available retrieval and expiry controls for the handoff.
No phone number or email required for core Hat use.
The useful difference
A clearer way to handle sensitive work.
Set the lifecycle
Choose supported viewing limits, time locks or expiry rules before delivery.
Separate handoff from chat
Use a drop for a specific exchange, and a Hat channel when you need an ongoing conversation.
How it works
Three deliberate steps.
Compose the drop
Add the message or supported file and choose the available lifecycle options.
Share carefully
Check the recipient and protect the retrieval link and any secret needed to open it.
Retrieve within the rules
The recipient opens the drop before expiry; subsequent access follows the selected lifecycle.
Know the boundary
Choose controls with clear expectations.
Deleting a service payload cannot erase a copy already downloaded or photographed by the recipient. A link can be forwarded, and devices or networks may retain traces. Choose retention rules compatible with your obligations.
Review the security evidenceQuestions, answered
Before you get started.
Where can I use Dead Drops?
Open City of Hats to review the controls available for your client, content and plan. The app shows applicable requirements before you proceed.
What should I check before sharing sensitive information?
Verify the recipient, use a supported device and choose appropriate access and retention rules. Review the Security Evidence Center for boundaries and evidence status.
City of Hats is free to use. Feature availability and limits vary by plan and client. Premium is optional; review current limits in the app or on the plans page.
Explore what matters next
Build the workflow around your work.
Start with a Hat
Give sensitive work its own space.
Start free. Choose your controls as the work requires them.