ESP Finder

Discover the software used
to send any email campaign.

Curious which email service provider (ESP) was used to send the marketing emails in your inbox? Just forward them to [email protected] and we’ll instantly reply with the answer. Best of all, it's free.

This tool is provided free of charge by SendView, a slick competitor tracking platform for email marketers.

ESP Finder can identify over 315 ESPs and is 100% free.
Just forward any email to:
[email protected]

Most Analyzed ESPs

We can currently identify over 315 ESPs and we're always adding new ones, but if we can't identify a specific ESP they won't show up on the list.

ESP Name	% of Total	Chart
MailChimp	10.7%
Salesforce	9.9%
Klaviyo	9.2%
HubSpot	5.3%
Acoustic	5.0%
Iterable	3.8%
Responsys	3.2%
Marketo	3.1%
ActiveCampaign	2.4%
NGP VAN	2.1%
Sailthru	2.1%
Shopify	2.0%
Emarsys	1.9%
Braze	1.9%
Pardot	1.6%
CampaignMonitor	1.5%
Omnisend	1.4%
Intercom	1.4%
ActionKit	1.3%
Listrak	1.2%
Eloqua	1.2%
dotdigital	1.1%
ExpertSender	1.1%
Cheetah	1.0%
Bronto	0.9%
Constant Contact	0.9%
Epsilon	0.9%
Adestra	0.8%
Customer.io	0.7%
Infusionsoft	0.7%
ConvertKit	0.7%
SendinBlue	0.7%
Blueshift	0.6%
Technolutions	0.6%
Blue State	0.6%
Bluecore	0.5%
Emma	0.5%
Wunderkind	0.5%
Mapp	0.4%
MailerLite	0.4%
GetResponse	0.4%
Maropost	0.4%
Retention Science	0.4%
Drip	0.4%
EmailOctopus	0.4%
Selligent	0.4%
Action Network	0.3%
Cordial	0.3%
Paramount	0.3%
Sendy	0.3%