Factusol is an invoicing, stock control and service billing program from Software DELSOL, a Spanish company based in Mengíbar, Jaén. It runs as a Windows program on a local PC or local network, and the same product offers a cloud option in which customers work with their data online. It is aimed at small and medium-sized businesses and self-employed professionals who need to manage invoices, sales, purchases and inventory in one place.
Software DELSOL is part of the TeamSystem group. The majority shareholder of TeamSystem is the US investment firm Hellman & Friedman, which holds a controlling stake. The privacy policy names Software del Sol S.A.U. as data controller and states that some processing may take place outside the EU, for example in customer-service tools. The website does not state where cloud-stored data is hosted. The local version is installed on the customer's own systems, so the hosting question applies to the cloud option.