Email Detective — ESP Tracker

by EmailTooltester

Get Email DetectiveDetect any senderright in your inbox Gmail Outlook

Email service providers used by Professional Services brands

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

343Brands tracked

10ESPs detected

Top ESPs in Professional Services

SendGrid

63

Amazon SES

49

Mailgun

37

Mailchimp

34

HubSpot

33

Salesforce MC

25

Kit

25

17

SparkPost

16

Iterable

16

Brands in Professional Services

Atlassian Amazon SES

1065 obs

Analystratings SendGrid

584 obs

Calendly SendGrid

367 obs

Futureslabresearch Iterable

330 obs

Usps Mailgun

220 obs

Justworks Constant Contact

213 obs

Cloudflare SparkPost

206 obs

Pertxpert Iterable

163 obs

Glassdoor SendGrid

162 obs

Indeed SparkPost

136 obs

Pandadoc Mailgun

124 obs

Linkedin Adobe Campaign

117 obs

Hronecloud Brevo

108 obs

Upwork Mailgun

107 obs

G2 Iterable

95 obs

Hellosign Mailgun

93 obs

Thespotcowork Mailgun

91 obs

Capitaxer Iterable

89 obs

Williamsadvises Iterable

85 obs

Rippling SendGrid

82 obs

Bejakovic Kit

77 obs

Govdelivery Amazon SES

70 obs

Ewomennetwork Mailgun

68 obs

Linksquares Amazon SES

67 obs

Propertyandentrepreneursummit Mailgun

59 obs

Wework SendGrid

58 obs

Mxtoolbox Mailgun

54 obs

Microsoft Adobe Campaign

54 obs

Experian Salesforce MC

52 obs

Fyxer Customer.io

47 obs

Accentgr Bloomreach

46 obs

1stamericanpath Iterable

46 obs

Peopleforce Amazon SES

45 obs

Namecheap SendGrid

43 obs

Sembly SendGrid

43 obs

Service Amazon SES

40 obs

Validity Salesforce MC

39 obs

Aws Amazon SES

38 obs

Attio Customer.io

38 obs

Cdpinstitute Kit

36 obs

Exitfive HubSpot

36 obs

Eurecia Mailgun

33 obs

Salesforceben HubSpot

33 obs

Crunchbase Iterable

32 obs

Epcnetwork Mailgun

30 obs

Themodernpeopleleader Kit

29 obs

Brownstoneresearch Salesforce MC

29 obs

Adp Salesforce MC

29 obs

M3aawg Mailgun

28 obs

Uspto Amazon SES

25 obs

Myenotice Mailgun

24 obs

Robmoore Salesforce MC

23 obs

Richardvanderblom ActiveCampaign

23 obs

Dpd SendGrid

23 obs

Sercante Salesforce CRM

23 obs

Mckinsey Epsilon

23 obs

Mattgiaro MailerLite

21 obs

Tutorful Braze

21 obs

Seek SendGrid

21 obs

Letstalkstrategy Mailchimp

20 obs

Shawnperkins Mailgun

20 obs

Deanjackson Mailgun

20 obs

Talent Talk Kit

19 obs

Systemssavedme Kit

19 obs

Civicplus Amazon SES

19 obs

Denic rapidmail

19 obs

Verisure Mailjet

18 obs

Auspost Salesforce MC

18 obs

Jointheassist Mailchimp

18 obs

Companieshouse Amazon SES

18 obs

Sectionai HubSpot

17 obs

Cal Postmark

17 obs

Carta Mailchimp

17 obs

Masterpeacecoaching Keap

17 obs

Sbs Infosys Amazon SES

17 obs

Yaelkeon ActiveCampaign

16 obs

Themathergroupllc Mailchimp

16 obs

Profitadvisornation Iterable

16 obs

Kolbe Mailchimp

16 obs

Sandraholze ActiveCampaign

15 obs

Negotiation Kit

15 obs

Kevinmcdonnell Mailchimp

15 obs

Martinstrobel Brevo

14 obs

Navyprofessional Klaviyo

14 obs

Xing Amazon SES

13 obs

Profitfirstprofessionals Mailgun

13 obs

Equisolve SendGrid

13 obs

Cadremploi Brevo

12 obs

Engagedgroups Kit

12 obs

Pmmalliance Intercom

12 obs

Beyondriskfactor Iterable

12 obs

Ama HubSpot

12 obs

Spservicing SendGrid

12 obs

Bizcomfort SendGrid

12 obs

Rivviaprojects Klaviyo

12 obs

Michaelegerber Keap

12 obs

Philipbandholtz GetResponse

11 obs

Booksy Mailchimp

11 obs

Higherlogic HubSpot

11 obs

Vertice HubSpot

11 obs

Anonymous data crowdsourced from Email Detective users. We collect only domain, esp, day — no personal data, no user identifiers. Back to all brands.