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ACI Worldwide

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Read 117 ACI Worldwide reviews and testimonials from customers, explore 105 case studies and customer success stories, and watch 14 customer videos to see why companies chose ACI Worldwide as their Payment Gateway Software

ACI Worldwide, the Universal Payments (UP) company, powers electronic payments for more than 5,100 organizations around the world. More than 1,000 of the largest financial institutions and intermediaries, as well as thousands of global merchants, rely on ACI to execute $14 trillion each day in payments and securities. In addition, a myriad of organizations utilize their electronic bill presentment and payment services. Through their comprehensive suite of software solutions delivered on customers’ premises or through ACI’s private cloud, they provide real-time, immediate payments capabilities and enable the industry’s most complete omni-channel payments experience.

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  • 117 Testimonials View
  • 105 Case Studies View
  • 14 Customer Videos View
Customer Rating Review Score based on 3898 reference ratings
4.8/5.0 (3898)
  • Summer 2025 Market Leader Payment Gateway Software

117Testimonials

  • “We have been able to gain a more complete view into the performance of our core processing systems. Now we have more visibility into the transactions coming into each of …

  • “Implementation of the ACI Chargeback Indemnification service was seamless and wrapped up in a week’s time. We were able to release or reassign staff over the course of one month …

  • “We needed a single, yet powerful integrated offering across all of our business lines, and ACI’s integrated Bill Payment Engine™ was the logical choice.”

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105 Case Studies

  • Horizon Increases Members 400% with New Insurance Payments System

  • How One Large Auto Lender Drove Satisfaction With ACI Speedpay

  • Simplifying the payments process for staff and offering more flexibility for students

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14 Customer Videos

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Additional ACI Worldwide Information & Resources

Read ACI Worldwide Reviews, Testimonials & Customer References from 117 real ACI Worldwide customers.

Browse ACI Worldwide Case Studies, Customer Success Stories, & Customer References from 105 businesses that use ACI Worldwide.

Watch ACI Worldwide Customer Videos to learn why 14 businesses chose ACI Worldwide.