Reddit Inc. sued Perplexity AI Inc. and three other companies over alleged data scraping from the discussion site without permission, a sign of the growing demand and value of original data in the burgeoning AI industry.

Three data scraping companies — Oxylabs UAB, AWMProxy, and SerpApi — have been illegally collecting Reddit data via Google search results for the purpose of reselling it, according to the complaint filed Wednesday in federal court in Manhattan. Perplexity has been buying that data from at least one of the companies, the suit alleges.