Email Detective — ESP Tracker

by EmailTooltester
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All brands › Marketing & Agencies

Email service providers used by Marketing & Agencies brands

Real-world data from emails received by Email Detective users. Brand counts include only senders that have crossed our visibility threshold.

862Brands tracked
10ESPs detected

Top ESPs in Marketing & Agencies

SendGrid
176
Amazon SES
144
HubSpot
121
Mailgun
84
Kit
61
Mailchimp
51
Postmark
51
Customer.io
48
Klaviyo
40
SparkPost
35

Brands in Marketing & Agencies

Beehiiv Beehiiv
1665 obs
Customer SendGrid
1603 obs
HubSpot HubSpot
1006 obs
Seguno Seguno
960 obs
Salesforce Salesforce MC
886 obs
Intercom Intercom
627 obs
Klaviyo Klaviyo
601 obs
EmailTooltester Brevo
502 obs
User Amazon SES
481 obs
Omnisend Omnisend
473 obs
Figma SendGrid
461 obs
Tinuiti Amazon SES
436 obs
Bloomreach Bloomreach
436 obs
Circle Mailgun
420 obs
Impact SendGrid
402 obs
Kit Kit
396 obs
Gong Mailgun
369 obs
Kajabimail Kajabi
308 obs
Hubstaff Amazon SES
294 obs
Ahrefs SendGrid
290 obs
Moengage Salesforce CRM
278 obs
ActiveCampaign ActiveCampaign
261 obs
Movableink Salesforce CRM
251 obs
Sarbacane Sarbacane
241 obs
Constant Contact Constant Contact
235 obs
Alertmouse Postmark
229 obs
Brevo Brevo
222 obs
Americanprofitinsight Amazon SES
220 obs
Iterable Salesforce CRM
205 obs
Greatmarketvision Iterable
200 obs
Revenuespotlights Iterable
199 obs
Zapier Mailgun
196 obs
Dealhub SendGrid
194 obs
Insiderintelligence Salesforce MC
183 obs
Zoominfo SendGrid
182 obs
Prolific SendGrid
175 obs
Tooltester Kit
174 obs
Cleverreach CleverReach
173 obs
Pertxpert Iterable
163 obs
Marketingprofs Acoustic
162 obs
Avoma Amazon SES
159 obs
Rechargemail SendGrid
154 obs
Chilipiper Amazon SES
153 obs
Royalgainnetwork Iterable
149 obs
Factorial SendGrid
143 obs
Benchmarkemail Benchmark
136 obs
Adsalsa Amazon SES
130 obs
Miro SparkPost
126 obs
MailerLite MailerLite
125 obs
Reallygoodemails Cordial
125 obs
Canva Braze
122 obs
Dub Amazon SES
120 obs
Braze Braze
117 obs
Martech Marketo
116 obs
Mailchimp Mailchimp
110 obs
Listengage Salesforce MC
106 obs
Fireflies SendGrid
103 obs
Partnerstack SendGrid
97 obs
Lever Mailgun
95 obs
Apollo Customer.io
91 obs
Kinsta HubSpot
89 obs
Read SendGrid
89 obs
Postmarkapp Postmark
86 obs
Ashbyhq Amazon SES
86 obs
Growthinreverse Kit
85 obs
Story Power Marketing Mailgun
84 obs
Glockapps Amazon SES
84 obs
Fathom Postmark
84 obs
Agencyofincome Iterable
81 obs
Yotpo SendGrid
79 obs
Cmswire Marketo
78 obs
Leadinfo Amazon SES
77 obs
Emailadviceinyourinbox Beehiiv
77 obs
Attentivemobile Zendesk
75 obs
Digitalmarkettrends Iterable
75 obs
Goldengatemarketers Iterable
75 obs
Emailonacid Mailgun
72 obs
Disprz Amazon SES
70 obs
Allabout Beehiiv
69 obs
Friendbuy SendGrid
69 obs
Via Everflow SendGrid
69 obs
Similarweb Salesforce MC
68 obs
Getmailtracker SendGrid
68 obs
Neilcanhelp Mailgun
67 obs
Bitly SendGrid
64 obs
Scrollyapp Klaviyo
63 obs
Amazonses Amazon SES
62 obs
Stripo Yespo
62 obs
Powerdmarc Amazon SES
60 obs
Squarespace Iterable
57 obs
Positivegroup Sarbacane
57 obs
Mn Mailgun
56 obs
Mixpanel Customer.io
56 obs
Qualified SendGrid
56 obs
Firstpromoter Postmark
55 obs
Ghost Ghost
55 obs
Rebrandly Customer.io
55 obs
Workweek Sailthru
55 obs
Alignedup SendGrid
55 obs
Tldrnewsletter Amazon SES
54 obs
Anonymous data crowdsourced from Email Detective users. We collect only domain, esp, day — no personal data, no user identifiers. Back to all brands.