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Customer.io

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Read 60 Customer.io reviews and testimonials from customers, explore 21 case studies and customer success stories, and watch 1 customer videos to see why companies chose Customer.io as their Transactional Email Software

Customer.io is a leading customer engagement platform designed for organizations to create personalized customer journeys that engage, convert, and scale. Orchestrate messages across all channels, including email, in-app, SMS, push, and webhooks. Over 7,500+ companies, including Notion, Typeform, and Angi, rely on Customer.io to power their messaging needs.

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Customer Rating Review Scorebased on 1434 reference ratings
4.8/5.0 (1434)
  • Top Performer 2025 2025
    Winter 2025Top PerformerTransactional Email Software
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60Testimonials

  • "Performance analytics are very important to us as an eComm business, and Customer.io provides both broad and granular views of message performance. Plus it integrates perfectly with the rest of our tech stack and CDP."

    Bjørn SeatonChief Marketing Officer
59 more testimonialscurrently locked

21 Case Studies

  • Bamboo doubled conversion rates: The power of multi-channel messaging

    Ugo IwuchukwuHead of Marketing & Partnerships
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1 Customer Videos

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Additional Customer.io Information & Resources

Read Customer.io Reviews, Testimonials & Customer References from 60 real Customer.io customers.

Browse Customer.io Case Studies, Customer Success Stories, & Customer References from 21 businesses that use Customer.io.

Watch Customer.io Customer Videos to learn why 1 businesses chose Customer.io.

Explore answers to frequently asked questions about Customer.io.

FeaturedCustomers has 1,833,904+ validated customer references including reviews, case studies, success stories, customer stories, testimonials and customer videos that will help you make better software purchasing decisions.