We develop databases, retrieving them from online sources by means of automatic processes using tools like BeautifulSoup, Scrapy, Requests and Selenium, all of them from Python. For this service, the first thing to do is a viability and legal study for the data extraction, since not all webplaces allow to legally be analysed using the mentioned automatic processes above. This service is used to generate databases, which are the front door to other purification and processing models, allowing the customer to obtain the knowledge it seeks even without any need of databases beforehand.