Seventh Sense
Early StageAI-driven email send time optimization for HubSpot and Marketo
👥 100K+ users💰 $2M Seed
✓ Last verified: March 2026
Seventh Sense uses machine learning to analyze individual recipient engagement patterns and deliver emails at the optimal time for each person. It integrates directly with HubSpot and Marketo to improve open rates, reduce unsubscribes, and increase email deliverability through intelligent send-time distribution.
Our Ratings
7
Ease of Use
8
Output Quality
7
Value
7
Support
4
Versatility
Key Features
- ✓Per-recipient send time optimization using engagement history
- ✓Throttled email delivery to improve inbox placement rates
- ✓Engagement frequency optimization to reduce list fatigue
- ✓Visual heatmaps showing each contact's peak engagement windows
- ✓Automated re-engagement campaigns for dormant contacts
Best For
- 👍 B2B marketers using HubSpot or Marketo with large email lists
- 👍 Email teams wanting to improve deliverability and inbox placement
- 👍 Organizations experiencing declining open rates due to send-time issues
Limitations
- ⚠️ Only integrates with HubSpot and Marketo, not other ESPs
- ⚠️ Requires several weeks of historical data to build accurate models
- ⚠️ Pricing is per-contact which adds up with larger databases
Integrations
HubSpotMarketo
Quick Facts
DifficultyIntermediate
Team sizesmall
API accessNo
Mobile appNo
Data privacymedium
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