Email Detective — ESP Tracker (by EmailTooltester)

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Brand	Marketing	Other ESPs	Setup	Obs	Last seen
Barbour barbour.com ↗	Bloomreach 110	Mailgun 241	53	351	2026-07-01
Helpscout helpscout.net ↗	HubSpot 79	—	58	79	2026-06-30
User user.com ↗	Positive User 156	Amazon SES 377	62	533	2026-07-01

Newsletter / campaign platforms, by brand count

SMTP relay / infrastructure, by brand count

Email design tools, by brand count

38 brands ship interactive AMP emails

Averaged across 3,827 brands with 5+ placement observations

inbox 82.2%promotions 16.4%spam 1.5%

Spam placement is mostly driven by the sender (list quality, content, complaints), not the ESP.

14.9% of Outlook opens never fire the sender's tracking pixel (images blocked)

Based on 1,407 opens tracked. Open rates undercount real opens more than most senders realize.

Anonymous, privacy-preserving observations from the free Email Detective extension. Read more