Teamscale is a software quality platform from CQSE GmbH in Munich. It gives insight into code, tests, security, architecture, issues and requirements across the software lifecycle, and is aimed at development teams and software managers. It is offered as on-premises hosting whose administration and operation are carried out by CQSE's Teamscale operators.
CQSE GmbH is a German company headquartered in Munich, and no foreign owner is named for it. Teamscale is commercial software and not open source, so use requires a commercial licence. For a European organisation, the location of operation is the decisive question. In a CQSE-operated environment, the contract should specify where the instance runs and who has access to it, because the vendor publishes no specific details on this.