21Captains emails
21Captains sends about 2 emails a week through Klaviyo, most often on Tuesday around 4 AM Eastern.
- ESP
- Klaviyo
- Emails a week
- about 2
- Busiest send time
- Tuesdays at 4am ET
- Last sent
- 3 days ago · Oct 27
- Tracked since
- Mar 2026
- Emails collected
- 21
Recent emails
Oct 27, 2026 5:30 PM
A Troopy, an old house and a bathroom
Oct 24, 2026 11:51 PM
Our Promise To You (Let’s Shake On It)
Oct 20, 2026 11:50 PM
Still thinking it over, ?
Oct 20, 2026 5:00 AM
Is your Air Refiner in the right spot?”
Oct 16, 2026 11:49 PM
- Your 5% off is still waiting.
Oct 15, 2026 7:11 AM
Still thinking about it, ?
Recent subject lines
All subject linesSubject lines average 32 characters. Each one opens the email it came from.
| Picture | Sent (Eastern) | Subject | Preview text |
|---|---|---|---|
| Oct 27, 2026 5:30 PM | A Troopy, an old house and a bathroom | What three owners noticed first, in their own words. | |
| Oct 24, 2026 11:51 PM | Our Promise To You (Let’s Shake On It) | What you can expect from us, every time | |
| Oct 20, 2026 11:50 PM | Still thinking it over, ? | Your 5% welcome code is ready when you are. | |
| Oct 20, 2026 5:00 AM | Is your Air Refiner in the right spot?” | Our guide to where each one works hardest, from the van to the wardrobe. | |
| Oct 16, 2026 11:49 PM | - Your 5% off is still waiting. | 544 verified reviews say it's worth using. | |
| Oct 15, 2026 7:11 AM | Still thinking about it, ? | Here’s why so many travellers trust 21Captains ⚓️ | |
| Oct 14, 2026 1:09 AM | Still thinking it over? | The one you were checking out is still waiting ⚓️ | |
| Oct 13, 2026 11:48 PM | Welcome aboard 🫡 Here’s 5% off to get you started | You’ve just joined a crew that does things differently |
Archive
View full archiveOctober 2026 11 emails
View allOct 14, 2026 1:09 AM
Welcome aboard 🫡 Here’s 5% off to get you started
Oct 13, 2026 11:48 PM
We won! Plus your October Sunbake reminder.
Oct 13, 2026 9:01 PM
Oct 2, 2026 8:37 AM
Oct 1, 2026 2:35 AM
September 2026 3 emails
View allDid your partner steal your Air Refiner?
Sep 30, 2026 8:05 PM
You kept asking about the pink. Here's our answer.
Sep 14, 2026 4:45 AM
Your September Fleet Newsletter is here!
Sep 11, 2026 4:30 AM
When 21Captains sends
19% of its emails arrive in the 4 AM hour, with a second, smaller wave around 11 PM. Tuesdays are the busiest day.
| 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tue | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 2 |
| Wed | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Thu | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Fri | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
| Sat | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Sun | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
|---|---|---|---|---|---|---|---|
| 12a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1a | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 2a | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 3a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4a | 2 | 0 | 1 | 0 | 1 | 0 | 0 |
| 5a | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 6a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7a | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 8a | 1 | 0 | 1 | 0 | 1 | 0 | 0 |
| 9a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 12p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2p | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
| 3p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5p | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 6p | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 7p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8p | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 9p | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 10p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11p | 0 | 2 | 0 | 0 | 1 | 1 | 0 |
FewerMore(busiest cell: 2 emails)
Based on 21 emails received from Mar 16 to Oct 27, 2026. Times in US Eastern. How we collect · When all brands send
How often 21Captains sends
The one complete month so far had 3 emails. April, May, June and July were not collected, so they are drawn as gaps and left out.
- Busiest month
- Sep 2026, 3
- Quietest month
- Sep 2026, 3
- Busiest day
- Tuesday, 6
- Quietest day
- Sunday, 0
About 21Captains
- ESP
- Klaviyo
- Tracked since
- Mar 2026
- Emails collected
- 21
- Emails a week
- about 2
- Last sent
- Oct 27, 2026
- Sends from
- customerservice@
21captains.com - Subject length
- 32 characters avg
Counts include automated emails such as a welcome series.
Similar sending frequency
| Latest email | Brand | ESP | Website popularity | Emails a week | Busiest day | Last sent | |
|---|---|---|---|---|---|---|---|
 24Builds24builds.com · Top 1 million sites | Klaviyo | Top 1 million sites | about 2 | Friday | Oct 30, 2026 | Klaviyo · about 2 a week · busiest Friday · last sent Oct 30, 2026 | |
 13th Heaven Co.13thheaven.com | Klaviyo | about 2 | Friday | Oct 30, 2026 | Klaviyo · about 2 a week · busiest Friday · last sent Oct 30, 2026 | ||
 2902929029.co | Klaviyo | about 2 | Wednesday | Oct 29, 2026 | Klaviyo · about 2 a week · busiest Wednesday · last sent Oct 29, 2026 |
