The core activity of PaytestLab AG is the development and provision of software solutions for the payment testing industry. The company offers a range of products, including PaytestHub, PaytestRobot, PaytestMux, PaytestCore, PaytestECR, PaytestProbe, and PaytestPlayer, which aim to automate and optimize payment testing processes. The company also supports distributors and partners in the dissemination of its solutions and offers a range of services, including the PaytestHub Help Desk and a library of resources.