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Resend is the 11th most popular transactional ESP we track.
Detected by 33 distinct extension users.
Distribution of brands using Resend by industry. Helps you gauge whether this ESP is popular with businesses similar to yours. Brands tagged in two industries are counted in both.
Based on 20 of 21 brands tagged (95% coverage). Industries assigned automatically using AI; not every brand is tagged yet.
Where this ESP's emails land in Gmail. Each brand counted once (average of per-brand percentages) so a single high-volume sender can't dominate. Spam placement is mostly driven by the sender (list quality, content, complaint rate). This number reflects both the ESP's infrastructure AND the kind of senders who choose it — not just deliverability quality.
By volume: inbox 199 · promotions 21 (223 emails observed)
Percentages are averaged per brand (each counted once) across 7 brands using Resend with at least 5 placement observations each.
9 as their primary ESP, the rest send transactional or secondary email through it. Primary users are listed first, then secondary.
| Brand | Role | Obs | Spam | Last seen |
|---|---|---|---|---|
|
Resend
resend.com
|
primary | 5 | 50% | 2026-06-27 |
|
Ezremove
ezremove.ai
|
primary | 1 | — | 2026-06-07 |
|
Findecoded
findecoded.com
|
primary | 1 | — | 2026-06-27 |
|
Karumi
karumi.ai
|
primary | 2 | — | 2026-06-30 |
|
Kingdomcrown
kingdomcrown.life
|
primary | 1 | — | 2026-06-25 |
|
Newsletters
newsletters.club
|
primary | 2 | — | 2026-06-27 |
|
Vestigio
vestigio.domains
|
primary | 1 | — | 2026-06-26 |
|
Waitlister
waitlister.me
|
primary | 1 | — | 2026-06-26 |
|
Yosa
yosa.ai
|
primary | 2 | — | 2026-06-29 |
|
Mistral
mistral.ai
|
secondary | 2 | 0.0% | 2026-06-25 |
|
Dub
dub.co
|
secondary | 6 | 0.0% | 2026-06-23 |
|
Every
every.to
|
secondary | 2 | 0.0% | 2026-06-28 |
|
Askelephant
askelephant.ai
|
secondary | 1 | 0.0% | 2026-06-25 |
|
Creativul
creativul.com
|
secondary | 1 | — | 2026-06-22 |
|
Heystream
heystream.com
|
secondary | 1 | — | 2026-06-25 |
|
Infinite Institute
infinite-institute.com
|
secondary | 1 | — | 2026-06-25 |
|
Infraova
infraova.com
|
secondary | 1 | 0.0% | 2026-06-27 |
|
Marketingcloud30
marketingcloud30.com
|
secondary | 3 | 0.0% | 2026-06-29 |
|
Prebodigital
prebodigital.co.za
|
secondary | 1 | 0.0% | 2026-06-26 |
|
Segmentflow
segmentflow.ai
|
secondary | 1 | 0.0% | 2026-06-26 |
|
Thread
thread.app
|
secondary | 2 | 0.0% | 2026-06-29 |
IPs we've observed sending via Resend. "Brands" = distinct brands seen on each IP; "Placement" = where those emails landed in Gmail (inbox / promotions / spam). Click "reputation" to check the IP on Cisco Talos.
| IP | Hostname | Brands | Obs | Placement | Reputation |
|---|---|---|---|---|---|
| 54.240.14.56 | a14-56.smtp-out.amazonses.com |
1 | 2 | 4 | Check → |
| 54.240.9.104 | a9-104.smtp-out.amazonses.com |
1 | 2 | — | Check → |
| 23.251.234.54 | e234-54.smtp-out.ap-northeast-1.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.9.116 | a9-116.smtp-out.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.9.107 | a9-107.smtp-out.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.9.37 | unknown |
1 | 1 | — | Check → |
| 54.240.9.3 | a9-3.smtp-out.amazonses.com |
1 | 1 | — | Check → |
| 54.240.9.20 | a9-20.smtp-out.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.14.146 | a14-146.smtp-out.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.3.10 | a3-10.smtp-out.eu-west-1.amazonses.com |
1 | 1 | 1 | Check → |
| 54.240.9.24 | a9-24.smtp-out.amazonses.com |
1 | 1 | 3 | Check → |