Perplexity

Perplexity is an AI-powered answer engine that responds to queries with a synthesized answer plus cited, clickable sources pulled from a live web search — positioning it as an alternative to both traditional search engines and standard chatbots. It supports focused search modes, file upload for grounding answers in your own documents, and a Pro tier that unlocks access to multiple underlying models and expanded "Pro search" usage. Because every claim links back to a source, it's commonly used for research tasks where verifiability matters more than open-ended conversation.