ESP Finder
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Find the ESP behind any marketing email.

Curious which email platform was used to send the marketing campaigns in your inbox? Just forward them to and we’ll instantly reply with the answer.

ESP Finder is 100% free, just forward any email to:

Top 25 ESPs

Keep in mind that while we current track over 90 ESPs and we're always adding new ones, if we can't identify a specific ESP they won't show up on the list.
ESP Name % of Total Chart
    MailChimp     21.4%
    Salesforce     14.1%
    Responsys     6.9%
    HubSpot     5.2%
    IBM     4.8%
    Sparkpost     4.4%
    Braze     3.6%
    Sailthru     3.2%
    Marketo     2.8%
    CampaignMonitor     2.4%
    Bronto     2.0%
    Iterable     2.0%
    Listrak     2.0%
    Constant Contact     1.6%
    Emarsys     1.6%
    ActiveCampaign     1.6%
    Klaviyo     1.6%
    Eloqua     1.2%
    Pardot     1.2%
    All In     1.2%
    Mailjet     0.8%     0.8%
    EveryAction     0.8%
    Dyn     0.8%
    Epsilon     0.8%

Made with by two hard-working dads.

We're Gregg and Patrick, two marketers and friends who love to build handy tools for hard-working marketers. Have a question? Just reach out. We'd love to chat.


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