Seventh Sense
AI send-time optimization for HubSpot and Marketo email.
About
Seventh Sense is an AI layer on top of HubSpot and Marketo that schedules each email to the individual contact's best open time instead of blasting the whole list at once. It also handles frequency optimization, audience recycling for fatigued contacts, campaign throttling, and deliverability insights, writing engagement profiles back into HubSpot CRM records.
It has been at this since 2013 and claims 500M+ personalized emails orchestrated monthly, which shows in the maturity. The catch is scope: it only works with HubSpot or Marketo, and the full Business plan is $180/month billed annually.
What it can do
- Per-contact AI send-time optimization
- Email frequency optimization
- Audience recycling and fatigue suppression
- Campaign throttling and pause controls
- Deliverability and inbox-provider insights
- Engagement profiles synced to CRM
- Free trial with live-data insights in 24 hours
Setup
- Start the free trial and connect your HubSpot or Marketo portal.
- Let the AI build engagement profiles from historical data (first insights in ~24 hours).
- Enable send-time optimization on campaigns.
- Add frequency caps and audience recycling rules as needed.
Prerequisites
HubSpot or Marketo account; Business plan from $180/month (annual).
Use cases
Works with
Trust score — 6/10
Scored 6/10 (metrics tier, metrics-v1). Evidence: operating since 2013; vendor claims 500M+ personalized emails/month (provider claim); HubSpot/Marketplace-only scope — hard limitation, verified across sources; Business plan $180/month annual; free trial with live-data insights in 24h; closed SaaS, no public API. License: Proprietary SaaS, closed source..
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 6.0/10
- Maintenance · recency, releases, issue load
- 7.0/10
- Openness · license + docs
- 3.0/10
- Manual review · sanity read + red-flag check
- 6.0/10
- · operating since 2013; vendor claims 500M+ personalized emails/month (provider claim)
- · HubSpot/Marketplace-only scope — hard limitation, verified across sources
- · Business plan $180/month annual; free trial with live-data insights in 24h
- · closed SaaS, no public API
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.