Microsoft Faces Antitrust Complaint in Spain Over Cloud Services

Microsoft Corp. has been accused of anti-competitive behavior in a new complaint filed to the Spanish antitrust regulator amid growing scrutiny of the technology giant’s power in the cloud computing market.

Asociación Española de Startups, which represents 700 companies and counts as partners Alphabet Inc.’s Google and Amazon Web Services, the cloud unit of Amazon.com Inc., filed a formal complaint with competition regulator CNMC on Monday, alleging that Microsoft is leveraging its dominance in the software market to force the use of its cloud services.

The group argues that the technical and contractual barriers imposed by Microsoft are “significantly ...