StarMoney is multibanking software from Star Finanz of Hamburg, available as a program for Windows and Mac and as an app for smartphones and tablets. The main product page is aimed at private customers; for business customers the company supplies StarMoney Business and SFirm. According to the vendor, StarMoney connects accounts, payment services and customer accounts from multiple providers and shows a dashboard with transactions, budgets and charts. A household budget book and guided setup of bank accounts are part of the package.
Star Finanz describes itself as a company of the Sparkassen-Finanzgruppe and is based in Hamburg, Germany; no non-European parent is known. StarMoney is software that you install yourself. The pages consulted do not say where account data and any synchronisation through StarMoney Flat are processed, so you should ask the vendor. The privacy policy mentions transfers to the US only for third-party services on the website, such as Google and LinkedIn.