The world is experiencing an unprecedented digitalization process. Digital solutions to everyday problems are nothing new, but the COVID-19 pandemic leveraged them in an almost imposing way. The legal process, medical consultations, and even much of the traditional office work today have some digital correlation, and in the digital world, robots can automate several examples of repetitive work. The term RPA (Robotic Process Automation) is used to designate software that performs tasks previously done manually. Currently, various tools allow for automated workflows on the internet, and many companies are built around these solutions. Two of these tools are well known: Puppeteer and Selenium. This work conducted a comparative study between these two technologies, pointing out positive and negative aspects and showing situations where there may be an advantage for one or the other. The results obtained in two different experiments show that in case 1, which deals with the automation of filling out forms on the Web, the tools perform in a statistically equivalent way, while in case 2, referring to data extraction and report generation, Puppeteer presents significantly better results. This work verifies that among the factors that can be decisive in the performance difference is how the interface between the written code and the Web browser is made.