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Read 40 Mailgun reviews and testimonials from customers, explore 36 case studies and customer success stories, and watch 2 customer videos to see why companies chose Mailgun as their Email Delivery 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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  • 40 Testimonials View
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Customer Rating Review Score based on 3669 reference ratings
4.7/5.0 (3669)
  • Winter 2026 Market Leader Transactional Email Software
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40Testimonials

  • "Mailgun's Email Validation API is simple and incredibly accurate. It allows our customers to make changes to their email address quickly, which only adds to the product’s value-add."

    Joe Dan Galyean Vice President of Software Development

  • "Dead simple setup, top-notch customer support, incredibly powerful apis, and completely dependable. Mailgun delivers a feature-rich service that lets us focus on managing our product instead of our mail servers."

    Gobble

  • "Mailgun makes it easy to track the delivery of emails without maintaining our own email infrastructure, subscribing to spam feedback loops, or developing our own bounce detection software. In the …

    Anyvite
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36 Case Studies

  • Behind the Scene at Jungle Disk Reliable Email Communications with Mailgun

  • How Switchboard improved email deliverability with Mailgun Validate

    Justine Hong COO

  • Omnisend - Customer Case Study

    Paulius Milisauskas VP of Customer Operations
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2 Customer Videos

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Additional Mailgun Information & Resources

Read Mailgun Reviews, Testimonials & Customer References from 40 real Mailgun customers.

Browse Mailgun Case Studies, Customer Success Stories, & Customer References from 36 businesses that use Mailgun.

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

FeaturedCustomers has 2,120,568+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.