Track your competitors' email marketing tactics with SendView 🙌

See their ESP, content calendar, spam scores, source code, and more.

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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 esp@sendview.io 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.
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ESP Finder can identify over 315 ESPs and is 100% free.
Just forward any email to:
esp@sendview.io

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