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 esp@peakfeed.com and we’ll instantly reply with the answer.

ESP Finder is 100% free, just forward any email to:
esp@peakfeed.com

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%
    Customer.io     0.8%
    EveryAction     0.8%
    Dyn     0.8%
    Epsilon     0.8%

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