Lumo is a privacy-first read receipt for Gmail. Know the moment your message is opened and your links are clicked — with smart filtering so a mail scanner never gets mistaken for a real read.
We’re onboarding people in batches. Request access and we’ll send your invite.
Add the Lumo extension to Chrome and sign in. It hooks into Gmail’s compose window — nothing else.
Write and send like always. Lumo quietly adds tracking to your outgoing mail before it leaves.
Your dashboard lights up in real time when a message is opened or a link is clicked.
Apple Mail Privacy, Gmail’s image proxy, security scanners and pre-fetches are detected and filtered, so an automated load never shows up as a real human read.
Tracking runs on Lumo’s own infrastructure — not a shared network. We store what’s needed to show your opens and clicks, and nothing more.
Treat an open as a hint that it’s a good time to follow up — never as proof. We keep it calm and light.
Join the waitlist and we’ll send an invite as spots open up.