Endorphin emails
Endorphin sends about 3 emails a week through Klaviyo, most often on Sunday around 6 AM Eastern.
- ESP
- Klaviyo
- Emails a week
- about 3
- Busiest send time
- Sundays at 6am ET
- Last sent
- 3 days ago · Oct 28
- Tracked since
- Mar 2026
- Emails collected
- 53
Recent emails
Oct 28, 2026 5:01 AM
Cold mornings. Electric Blue.
Oct 25, 2026 6:23 AM
Holds more than expected
Oct 25, 2026 4:03 AM
Meet Electric Blue.
Oct 24, 2026 6:22 AM
“I forgot it was there”
Oct 23, 2026 6:21 AM
Not a $20 belt
Oct 23, 2026 4:02 AM
Run with your dog. Hands free.
Recent subject lines
All subject linesSubject lines average 26 characters. Each one opens the email it came from.
| Picture | Sent (Eastern) | Subject | Preview text |
|---|---|---|---|
| Oct 28, 2026 5:01 AM | Cold mornings. Electric Blue. | A new color for your running rotation. The early access list shops first. | |
| Oct 25, 2026 6:23 AM | Holds more than expected | Here’s how | |
| Oct 25, 2026 4:03 AM | Meet Electric Blue. | Our next limited-edition color. Sign up to shop 24 hours early. | |
| Oct 24, 2026 6:22 AM | “I forgot it was there” | That’s the goal | |
| Oct 23, 2026 6:21 AM | Not a $20 belt | Here’s why | |
| Oct 23, 2026 4:02 AM | Run with your dog. Hands free. | The Dog Leash Attachment clips onto your Endorphin Belt. Shop it now. | |
| Oct 22, 2026 6:20 AM | Why $54.99 | Let’s address it | |
| Oct 21, 2026 6:19 AM | Your phone stays dry | Finally |
Archive
View full archiveOctober 2026 19 emails
View allOct 22, 2026 6:20 AM
Oct 21, 2026 6:19 AM
Oct 20, 2026 6:18 AM
Oct 19, 2026 6:17 AM
Oct 18, 2026 6:16 AM
Oct 17, 2026 6:15 AM
When Endorphin sends
26% of its emails arrive in the 6 AM hour, with a second, smaller wave around 11 AM. Sundays 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 | 0 | 0 | 2 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Tue | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wed | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Thu | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Fri | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 2 | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sat | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Sun | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 4 | 2 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
|---|---|---|---|---|---|---|---|
| 12a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1a | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 2a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4a | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| 5a | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 6a | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| 7a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9a | 1 | 0 | 0 | 1 | 1 | 1 | 4 |
| 10a | 1 | 1 | 0 | 0 | 2 | 2 | 2 |
| 11a | 1 | 1 | 1 | 3 | 2 | 0 | 1 |
| 12p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1p | 0 | 1 | 0 | 1 | 1 | 1 | 0 |
| 2p | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 3p | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 4p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10p | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 11p | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
FewerMore(busiest cell: 4 emails)
Based on 53 emails received from Mar 16 to Oct 28, 2026. Times in US Eastern. How we collect · When all brands send
How often Endorphin sends
The one complete month so far had 8 emails.
- Busiest month
- Sep 2026, 8
- Quietest month
- Sep 2026, 8
- Busiest day
- Sunday, 12
- Quietest day
- Tuesday, 5
About Endorphin
- ESP
- Klaviyo
- Tracked since
- Mar 2026
- Emails collected
- 53
- Emails a week
- about 3
- Last sent
- Oct 28, 2026
- Sends from
- support@
endorphinbelt.com - Subject length
- 26 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 | |
|---|---|---|---|---|---|---|---|
 1791 Gunleather1791gunleather.com · Top 1 million sites | Klaviyo | Top 1 million sites | about 3 | Friday | Oct 30, 2026 | Klaviyo · about 3 a week · busiest Friday · last sent Oct 30, 2026 | |
 A&E Leisureaeleisure.co.uk · Top 1 million sites | Klaviyo | Top 1 million sites | about 3 | Tuesday | Oct 28, 2026 | Klaviyo · about 3 a week · busiest Tuesday · last sent Oct 28, 2026 | |
 11th + Sixth11thandsixth.com | Klaviyo | about 3 | Thursday | Oct 22, 2026 | Klaviyo · about 3 a week · busiest Thursday · last sent Oct 22, 2026 |
