Snap Inc. announced a $400 million partnership with Perplexity AI Inc. to distribute the firm’s AI search engine to Snapchat users globally, according to a statement Wednesday. The shares surged 16% in extended trading after the news. The deal gives Snap a new business line and puts the social messaging company more squarely into the mix around AI chatbots and assistants. Perplexity’s AI-powered search engine will take “default” placement inside of Snapchat beginning in 2026, according to Snap C...