Email Detective — ESP Tracker

by EmailTooltester
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All brands › SaaS

Email service providers used by SaaS brands

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

1,230Brands tracked
10ESPs detected

Top ESPs in SaaS

SendGrid
348
Amazon SES
287
HubSpot
178
Mailgun
149
Customer.io
90
Postmark
83
Marketo
71
SparkPost
59
Iterable
54
Salesforce MC
50

Brands in SaaS

Beehiiv Beehiiv
1693 obs
Customer SendGrid
1629 obs
Atlassian Amazon SES
1061 obs
HubSpot HubSpot
1010 obs
Asana Amazon SES
988 obs
Zoom SendGrid
977 obs
Seguno Seguno
960 obs
Salesforce Salesforce MC
890 obs
Trello Amazon SES
799 obs
Intercom Intercom
629 obs
Klaviyo Klaviyo
615 obs
Slack Amazon SES
505 obs
User Amazon SES
493 obs
Omnisend Omnisend
475 obs
Figma SendGrid
463 obs
Tinuiti Amazon SES
439 obs
Bloomreach Bloomreach
437 obs
Circle Mailgun
423 obs
Impact SendGrid
412 obs
Kit Kit
400 obs
Getsentry SendGrid
397 obs
Stripe Amazon SES
389 obs
Gong Mailgun
369 obs
Calendly SendGrid
364 obs
Shopify Shopify Messaging
350 obs
Anthropic SendGrid
339 obs
Zendesk Zendesk
319 obs
Kajabimail Kajabi
308 obs
Flowium SendGrid
296 obs
Hubstaff Amazon SES
296 obs
Ahrefs SendGrid
291 obs
Monday Braze
287 obs
Moengage Salesforce CRM
280 obs
Latticehq Mailgun
265 obs
ActiveCampaign ActiveCampaign
261 obs
Movableink Salesforce CRM
251 obs
Openai SendGrid
244 obs
Sarbacane Sarbacane
241 obs
Clickup Amazon SES
240 obs
Constant Contact Constant Contact
235 obs
Alertmouse Postmark
232 obs
Brevo Brevo
223 obs
Luma Mail Amazon SES
213 obs
Justworks Constant Contact
212 obs
Iterable Salesforce CRM
208 obs
Cloudflare SparkPost
206 obs
Revenuespotlights Iterable
201 obs
Greatmarketvision Iterable
200 obs
Zapier Mailgun
197 obs
Dealhub SendGrid
197 obs
Zoominfo SendGrid
186 obs
Prolific SendGrid
181 obs
Appsumo Klaviyo
179 obs
Cleverreach CleverReach
174 obs
Therundown Beehiiv
168 obs
Glassdoor SendGrid
160 obs
Avoma Amazon SES
159 obs
Chilipiper Amazon SES
156 obs
Rechargemail SendGrid
154 obs
Google Bloomreach
148 obs
Amazonaws Amazon SES
145 obs
Linear Amazon SES
144 obs
Factorial SendGrid
143 obs
Intuit SendGrid
141 obs
Hive SparkPost
138 obs
Deel Amazon SES
137 obs
Benchmarkemail Benchmark
136 obs
Indeed SparkPost
134 obs
Miro SparkPost
132 obs
Getbrick Klaviyo
128 obs
MailerLite MailerLite
126 obs
Reallygoodemails Cordial
126 obs
Pandadoc Mailgun
123 obs
Canva Braze
122 obs
X SendGrid
118 obs
Braze Braze
117 obs
Linkedin Adobe Campaign
117 obs
Martech Marketo
116 obs
Mailchimp Mailchimp
111 obs
Bamboohr Mailgun
110 obs
Listengage Salesforce MC
109 obs
Eventbrite SparkPost
109 obs
Claude Iterable
108 obs
Hronecloud Brevo
108 obs
Fireflies SendGrid
107 obs
Upwork Mailgun
107 obs
Wix Forms SendGrid
107 obs
Ringover Brevo
107 obs
Gusto SendGrid
100 obs
Otter SendGrid
99 obs
Partnerstack SendGrid
97 obs
G2 Iterable
95 obs
Lever Mailgun
95 obs
Famly Amazon SES
94 obs
Meetup SendGrid
93 obs
Hellosign Mailgun
93 obs
Apollo Customer.io
91 obs
Kinsta HubSpot
89 obs
Read SendGrid
89 obs
Glockapps Amazon SES
88 obs
Anonymous data crowdsourced from Email Detective users. We collect only domain, esp, day — no personal data, no user identifiers. Back to all brands.