Payments Testing

We are changing how e-commerce is built

Whether you are a freelancer or a large enterprise team, you can build, test and scale your payments systems with confidence.

Painless Integrations

Get going faster with your payments integrations and features.

Payment API Simulators

A single, turbo-charged sandbox under your control. No more sandbox frustration.

Continuous Improvement

Leave no payment behind. Finally you can test all payments scenarios painlessly.

Built for developers


We offer powerful simulators of payment APIs for you and your team to use in your projects. Say goodbye to unreliable sandboxes and hard-to-remember test cards. Try it out here.

Why use Testing Pays



50% Less Dev Time

Our simulators enable your team to roll out new payment options in half the time. The more payment options for customers, the greater your revenue.


Build Better Checkout Flows

Our simulators give you the controls and tools to analyse and find improvements for your customer checkout experience.


Protect Revenues

We make continuous testing of you customer payments easy. Prevent software bugs that cause payments errors and outages.



Customer Testimonials

Having a way to reliably work through many different user journeys – happy paths and problems – on test environments opens up the possibility for the identification of significant improvements we can make to our product.

- Roger Martin, VP of Engineering

Before using TestingPays we were dropping transactions due to untested payment responses. Now our customers are given the correct information to help complete their transactions and our revenue has increased by 20%.

- Tony Woods, CEO, Eyesparks