Every Email, Delivered at
the Perfect Moment
AI analyzes 60 days of open history per subscriber, finds their peak engagement hour, and staggers delivery so every email lands when they're most likely to read it.
+18%
Avg open rate lift
60 days
History analyzed
4hr
Recomputation cycle
How the Algorithm Works
Five steps from raw data to perfectly timed delivery.
Collect Open Events
Pull every email open for each subscriber over a rolling 60-day window. Minimum 3 opens required.
Build Hour-of-Day Histogram
Extract the hour (UTC) from each open timestamp and build a frequency histogram across all 24 hours.
Identify Peak Hour
Select the hour with the highest open count as the subscriber's optimal send hour.
Stagger Campaign Delivery
When you send a campaign, each email is delayed to match the subscriber's personal peak hour.
Continuous Recomputation
Optimal hours are recalculated every 4 hours so timing adapts as subscriber behavior evolves.
Timing Is Everything
Per-Subscriber Timing
Not a blanket 'best time for your audience' — each subscriber gets their own optimal hour.
Higher Open Rates
Emails arriving at peak engagement windows get opened more. Timing is one of the highest-leverage levers.
Fully Automatic
No configuration needed. The optimizer runs every 4 hours in the background, updating profiles silently.
Smart Fallback
New subscribers without enough history get sent at your list's overall peak hour until they build their own profile.
Timezone Aware
Handles subscribers across every timezone. A 9am peak means 9am in their local time.
Adapts Over Time
As subscriber habits change, the algorithm adapts. Morning readers who become evening readers get re-optimized.
More AI-Powered Features
AI Campaign Builder
Write emails from a single prompt
Auto-Optimization
AI resends to non-openers
Subject Lines
A/B test AI-written variants
Engagement Scoring
Hot, warm & cold tiers
Behavioral Triggers
React to every subscriber action
Revenue Attribution
Track revenue from every email
List Hygiene
Auto-clean inactive subscribers
Stop Guessing When to Send
Let AI find the perfect moment for every subscriber. Higher opens, more clicks, better results.
No credit card required • Free plan includes 1,000 subscribers