No inboxes. No accounts. No database.

The exchange runs in your browser. There is no server side to send email from, and nothing to sign up for.

What we never collect

What we do measure

Aggregate traffic with Google Analytics 4 (property G-T414B9YV9T): pages viewed, approximate region, device class — the standard aggregate picture, via cookies (_ga, _ga_*). GA4 never sees your names or links: the pairing lives in the URL fragment, which browsers do not send to the server. See Google’s privacy policy or opt out.

The nitty-gritty of “the links are the data” is on the retention page.