The Perplexity website and logo are shown in this photo, in New York Reddit has filed a lawsuit against artificial intelligence company Perplexity AI and three other entities, accusing them of participating in an “industrial-scale, unlawful” operation to scrape millions of Reddit user comments for profit. The lawsuit, filed in a New York federal court, targets San Francisco-based Perplexity, known for its AI chatbot and “answer engine” that competes with Google and ChatGPT.