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Read 51 Postmark reviews and testimonials from customers, explore 32 case studies and customer success stories, and watch customer videos to see why companies chose Postmark as their Transactional Email Software

Postmark delivers your transactional email to your customers, on time every time. Your emails are important, get them to the inbox. Trusted by thousands of developers, Postmark is a fast and reliable transactional email service.

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Customer Rating Review Score based on 3521 reference ratings
4.7/5.0 (3521)
  • Winter 2025 Market Leader Transactional Email Software
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51Testimonials

  • "We’re really happy we decided to use Postmark for ITV’s British Soap Awards. We only count votes from verified email addresses and Postmark’s excellent delivery has lead to our highest …

    Owen Matthews Creative Director

  • "You go above and beyond to make sure your customers understand transactional email. The educational material you provide make me want to use you. But then there is also the …

    Tim Horton Partner

  • “We didn’t realize just how popular VSCO Film would become, and when we started we used an email sending agent that was quickly shut down by our hosting provider."

    Joel Flory CEO
50 more testimonials currently locked

32 Case Studies

  • MoonClerk powers recurring payments. Postmark powers their email

    Ryan Wood CTO

  • Yapmo - Customer Case Study

    Claire Schlafly VP of Operations

  • For Time To Pet, Postmark is a reliable email partner for customer …

    Mike Grenier Co-founder
31 more case studies currently locked

Additional Postmark Information & Resources

Read Postmark Reviews, Testimonials & Customer References from 51 real Postmark customers.

Browse Postmark Case Studies, Customer Success Stories, & Customer References from 32 businesses that use Postmark.

FeaturedCustomers has 1,896,982+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.