What is the best time to send a newsletter?

Across the Newsletrix corpus, the highest-density send slots are Tuesday and Thursday between 09:00 and 11:00 in the recipient's local timezone. However the optimum varies sharply by niche: B2B SaaS peaks Tuesday 10:00, ecommerce peaks Thursday 19:00, creators peak Sunday 08:00. The right answer for your sends depends on your specific competitor cohort, not a global average.

What is the worst time to send a newsletter?

Friday afternoon (after 14:00 local) and Saturday all day are the lowest-engagement slots in most niches. Mid-week mornings see 2-3x the open rate of Friday afternoon in the same audience.

Should I send when my competitors send?

Usually no. The recommendation engine in Newsletrix favours slots with low competitor density - landing in an inbox alongside 4 competitors splits attention. Pick the best slot in your niche that is least crowded by the brands you track.

Does the time matter more than the day?

Day matters more for B2B (Tue/Thu vs. Mon/Fri swings open rate by 30-50%); hour matters more for consumer (peak hours move the needle ~20% within the right day). Both compound when you get them right.

How does Newsletrix know?

Every newsletter forwarded to Newsletrix is analyzed for send timestamp (read from the Date header, with timezone offset). The corpus across thousands of brands becomes the benchmark - your tracked competitors become the calibration set for your account specifically.

📅 Send-time data

Best time to send a newsletter

Real data from thousands of newsletter sends. Hour-by-hour heatmaps, niche-specific peak windows, and a recommender that picks the slot least crowded by your tracked competitors.

See your best slots ✨

Hour x weekday heatmap Niche-calibrated ICS export

Quick answer

When should you send your newsletter?

TL;DR. Across the Newsletrix corpus, the highest-density send slots are Tuesday and Thursday, 09:00-11:00 recipient-local. But the right answer depends on your niche: B2B SaaS peaks Tue 10:00, ecommerce peaks Thu 19:00, creators peak Sun 08:00. The single best lever is picking the slot in your niche that is least crowded by the brands you compete with.

Benchmarks

Peak send slots by niche

Median of densest send hours by category. Updated quarterly.

Niche	Best day	Best hour	Worst slot
B2B SaaS	Tuesday	10:00	Fri 16:00+, Sat all day
Ecommerce	Thursday	19:00	Sun 14:00-18:00
Media / news	Wednesday	07:00	Sat 09:00-12:00
Creator / personal	Sunday	08:00	Mon 09:00-11:00
Fintech	Tuesday	09:00	Fri 14:00+
Developer / DevTools	Wednesday	11:00	Sun all day

How it works

From inbox to optimal window

Forward competitor newsletters

Subscribe to any competitor with your unique Newsletrix forwarding address.

Send timestamps captured

The original Date header (with timezone offset) is parsed and stored per send.

Heatmap rendered

Per-brand and cohort heatmaps - hour x weekday density grid in your timezone.

Optimal window picked

Recommender favours peak-engagement slots that are also least crowded by your tracked competitors.

Calendar export

Download the recommended weekly slots as an .ics file and drop them into Google Calendar.

Drift alerts

Get notified when a tracked competitor changes cadence so you can adjust your slot before they do.

Who it is for

Stop guessing send-time best practices from 2017

Marketers

Pick a slot calibrated against your real cohort, not a generic industry average.

Newsletter operators

Compare your send pattern to the best in your niche, find the slot that converts.

Agencies

Justify timing decisions to clients with a per-niche heatmap, not anecdote.

FAQ

Frequently asked questions

What is the best time overall?

Tue / Thu, 09:00-11:00 local. But niche-specific is always sharper.

What is the worst time?

Friday afternoon and Saturday in most niches. Open rates drop 2-3x vs. mid-week mornings.

Should I copy my competitors?

No - avoid them. The recommender favours slots they don't crowd so you don't share inbox attention.

Day or hour - which matters more?

Day for B2B (30-50% swing). Hour for consumer (~20% within the right day). Both compound.

Does timezone matter?

Yes. We parse the Date header offset so EU and US senders are not averaged together.

Is it free?

Yes - the niche-benchmark page is free. Personalised heatmaps require a free Newsletrix signup.

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