Photo messaging app-owner Snap Inc on Tuesday beat Wall Street targets for quarterly revenue and user growth, but gave weaker third quarter guidance than analysts had expected as it works to compete with tech giants for advertising dollars. Shares of Snap, which owns the Snapchat app, dropped 16% to $10.50 in after-market trading. Snap has attracted hundreds of millions of users thanks to its lighthearted photo filters and more recently, an AI-powered chatbot that can answer questions.