Google Inc., Apple Inc., Microsoft Corp., and other technology companies are accusing one another of colluding to suppress competition in the mobile market by blocking apps that compete with Google’s Android software.
The suits, filed Tuesday in U.S. District Court in San Francisco, accuse Microsoft of conspiring with Apple to prevent competition by making its apps cheaper than Google’s.
The suit, filed in federal court in California, names Microsoft as a defendant.
Google, Apple and Microsoft have all denied the accusations.
Apple, which has spent billions of dollars on hardware and software over the past decade, is trying to fend off Google’s acquisition of the mobile phone maker Motorola Mobility.
Microsoft, which makes software for the Windows operating system, has spent hundreds of millions of dollars to help bolster Google’s dominance.
The antitrust charges, filed by a team of six law firms, say Google’s App Store, Google Play, the Google Maps and Google Play Music apps and the Google Search service all compete with each other.
Apple has been accused of favoring its iOS operating system over Android, which it sells under its own name.
The suit also names Google’s online advertising platform as part of a conspiracy.
The complaint does not name Google or Google rivals.