Knock knock.
“Who's there?” is now a paid question.
Strangers, human or AI, post a small refundable hold to reach your inbox. Real mail gets through free; noise pays you.
See how it works →Incoming knockLive example
From stranger
j.austin@hush.com
Refundable hold
$2.00
“I’d like to discuss the proposal for the upcoming infrastructure project…”
Your verdict
Ignore it and the hold releases itself in 7 days.
The mechanics
One message, from knock to verdictOn arrival
Held
A stranger's message stops at the gate, before it ever reaches your inbox.
Seconds later
The knock
They place a refundable $2 hold, like a hotel deposit. Real senders lose nothing.
Within 7 days
Your verdict
Release and it is refunded, and they knock free forever. Claim and you keep ≈90%. Silence releases it for you.