Perplexity AI

Perplexity combines large language models with live retrieval so answers include linked citations readers can verify. It supports follow-up threads, focus modes for academic or financial queries (availability varies by plan), and mobile or desktop clients for daily information work.

A generous free tier coexists with Pro subscriptions that unlock higher-quality models, more uploads, and faster retrieval for heavy users. The product competes with traditional search by summarizing evidence rather than only listing links.

Researchers, investors, students, and knowledge workers use Perplexity when they want concise synthesis grounded in current sources, while still retaining the option to inspect originals.