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Subject Line Optimization

Seventh Sense

Per-person send-time optimisation for HubSpot and Marketo

pricingfree tierapi

Visit Seventh Sense checked 20 Aug 2026

What Seventh Sense is

Seventh Sense works out the individual hour each recipient tends to open email and holds the send until then, per person rather than per campaign, and recycles unengaged audiences into later sends. It reports per inbox provider. The constraint is absolute: it works only with HubSpot and Marketo and does nothing on its own, so it is an add-on to an existing platform rather than a tool in itself.

Pricing

Plan Price What you get
Business $180/mo From $180/mo billed annually — up to 25,000 marketing contacts
Enterprise On request Custom — from 150,000 marketing contacts

Free access: Free trial, setup in five minutes

read from the vendor pricing page · 20 Aug 2026 · how we verify

Best for

  • Teams already on HubSpot or Marketo whose open rates have flattened
  • Senders whose deliverability suffers from blasting a whole list at once

Not for

  • Anyone not on HubSpot or Marketo — those are the only two platforms it works with

Integrations

Compiled by Stepan Noianov from the vendor's own site and pricing page. Something wrong? Report an inaccuracy.