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Mailgun

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Read 39 Mailgun reviews and testimonials from customers, explore 29 case studies and customer success stories, and watch 2 customer videos to see why companies chose Mailgun as their Email API Software

Mailgun is a developer-focused email delivery platform that empowers companies to send, receive, and track transactional and marketing emails through an API. Founded in 2010, Mailgun became a Y-Combinator success story later acquired by Rackspace. In February 2017, Mailgun spun back out as a standalone business focused on building best-in-class email deliverability solutions. Mailgun enables developers to tightly integrate email into their apps, i.e. give real email mailboxes to their users, their web pages or any objects in their apps. Customers like Slack, Lyft, Github, and Reddit rely on Mailgun to deliver email to their customers.

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Customer Rating Review Scorebased on 3102 reference ratings
4.7/5.0 (3102)
  • Market Leader 2025 2025
    Winter 2025Market LeaderTransactional Email Software

39Testimonials

  • "We use Mailgun for all of our automated emails and for our weekly newsletter to our registered users. We also use it to communicate with our artists and labels."

38 more testimonialscurrently locked

29 Case Studies

  • How Ruby-Based DNSimple Uses Mailgun’s API To Create & Configure Domains For Email Forwarding

28 more case studiescurrently locked

2 Customer Videos

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Additional Mailgun Information & Resources

Read Mailgun Reviews, Testimonials & Customer References from 39 real Mailgun customers.

Browse Mailgun Case Studies, Customer Success Stories, & Customer References from 29 businesses that use Mailgun.

Watch Mailgun Customer Videos to learn why 2 businesses chose Mailgun.