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  • 4.8 / 5.0 (2528)
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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 Scorebased on 3242 reference ratings
4.7/5.0 (3242)
  • Market Leader 2025 2025
    Winter 2025Market LeaderTransactional Email Software
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51Testimonials

  • "Without a hitch, every single email type we moved to Postmark simply stopped having problems. All emails were being delivered to the inbox instantly."

    Josh SommersLead Developer
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32 Case Studies

  • Proposify banks on Postmark’s reliability

    Kyle RackiCo-Founder
31 more case studiescurrently 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 1,821,557+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.