ROSS Intelligence is alleging that Thomson Reuters uses anticompetitive behavior to maintain Westlaw’s dominance in the legal research space, according to a complaint filed Monday.

The counterclaims come in a lawsuit brought by Thomson Reuters against San Francisco-based legal research firm ROSS. In May, Thomson Reuters sued ROSS for allegedly working with a third party to scrape Westlaw’s copyrighted material with a bot to develop the artificial intelligence featured in its platform. Ross announced in December that it would be shutting down its operations as a result of the costs of the lawsuit and inability to fundraise.