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Maya Chen opened your email
3rd openiPhone · Brooklyn, NY · 2m ago
Re: Q2 procurement — pricing addendum
3 opens · 2 clicks · no reply yet
✦ Suggested follow-up
Maya has opened twice and clicked the pricing PDF. She didn't reply. Try a short note acknowledging the new line items — Tuesday morning lands best.
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Built around what the others got wrong.
Tracking is a commodity. The interesting work is what you do with the signal — and what you don't do to your recipients.
- 01
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Three opens, no reply? We draft the follow-up that fits the thread. Approve, edit, send — never a templated guess.
- 03
Chase the warmest leads first
The Chase Now worklist ranks every open thread by real engagement — who's reading, who clicked, who's gone quiet — so you follow up in priority order, not inbox order.
- 04
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A one-line consent footer keeps recipients in the loop — required workspace-wide or per send. Full audit log of everything we collected, ever.
- 05
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Real city, device, and active-now signal per recipient — with Apple Mail prefetch and your own self-opens filtered out, so the numbers actually mean something.
- 06
Open is just the first signal
We weight intent by opens, link clicks, replies, and how the thread behaves over 72 hours. The follow-up suggestion is the output, not the alert.
The signal
Open, click, reply. Then a recommendation.
Most trackers stop at the open. We weight intent by which links they clicked, where and on what device they opened, and how the thread behaves over 72 hours. The follow-up suggestion is the output, not the alert.
✦ Signal takeaway
Peak attention at hour 38. Send the follow-up Tuesday 9:14 AM — that's the next time this recipient was active.
Thread · procurement Q2
Signal over 72 hours
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DevelopersTeam · coming soon
Public API, coming with Team.
REST for reads, webhooks for events — landing with the Team plan. Pipe opens into HubSpot, Salesforce, Zapier, or your own CRM. No partnership form, no "contact sales for an API key."
Read the docs# Subscribe to thread.opened events
curl https://api.mailsenseai.com/v1/webhooks \
-H "Authorization: Bearer $MAILSENSEAI_KEY" \
-d url=https://hooks.acme.dev/inbound \
-d events[]=thread.opened \
-d events[]=thread.clicked
# You'll receive:
{
"event": "thread.opened",
"thread_id": "th_8m2KQ",
"recipient": "maya@northwind.co",
"device": "iPhone",
"city": "Brooklyn, NY",
"occurred_at":"2026-05-09T13:14:02Z"
}Find out what happens after you hit send.
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