Email Detective — ESP Tracker (by EmailTooltester)

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Brand	Marketing	Other ESPs	Setup	Obs	Last seen
EmailTooltester emailtooltester.com ↗	Brevo 470	Postmark 31 CleverReach 1	90	502	2026-06-29
Therundown therundown.ai ↗	Beehiiv 168	—	95	168	2026-06-30
Growthcurrency growthcurrency.net ↗	Kit 15	—	73	15	2026-06-26

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 3,708 brands with 5+ placement observations

inbox 82.2%promotions 16.4%spam 1.4%

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

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