The number we were able to gather refers to users rather than customers

[Rakibul200]

” Klaviyo , USA Klaviyo investor report “Over , customers are using Klaviyo.” Omnisend , Lithuania Omnisend website “K+ happy customers worldwide” AWeber , USA AWeber website “AWeber is an email marketing service provider helping over , customers.” Campaigner , USA Campaigner website “over , businesses“ Email Octopus , UK Email Octopus website “We've helped over , organisations. ” Kit , USA Kit Baremetrics page Baremetrics stats (real customers) Mailjet , France Mailjet website “With over , customers in countries” Data originally collected in June Similar to the Datanyze data I used in my LinkedIn post, Mailchimp is absolutely dominating the email marketing market by their number of users.

They were one of the first companies to lebanon telemarketing list introduce a freemium plan, and that also seems to be the reason for their huge popularity. However, it's unclear how many of them actually pay. MailerLite is another ESP that offers a (generous) free plan. Constant Contact and Brevo are the first ones that talk about customers. If they really have more than half a million customers, that's enormous.

A bit of a surprise is CleverReach, which isn't widely known internationally. They are likely the biggest ESP in German-speaking countries (Germany, Austria and Switzerland) and claim to have almost K customers, which is almost as big as GetResponse. More expensive ESPs like ActiveCampaign, Klaviyo and Keap don't have the same user numbers as the more popular ESPs; however, we can assume that their margins are considerably higher. Limitations of the data It's important to note that the data comes from the websites of the ESPs themselves.