The New York Post and Dow Jones, the parent company of The Wall Street Journal, sued Perplexity AI on Monday, claiming the artificial intelligence startup has illegally ripped off a "massive amount" of its reporting.

News Corp’s Dow Jones & Co., publisher of the Wall Street Journal, and the New York Post have sued Perplexity, a startup that calls itself an “AI-powered Swiss Army Knife for information discovery and curiosity,