Perplexity

Perplexity replaced the search habit for millions of people by answering questions directly and showing its work. Every response is assembled from live web sources with inline citations, so you can verify a claim in one click instead of trusting a black box. Focus modes narrow retrieval to academic papers, YouTube, Reddit, finance data or the general web, which makes it equally useful for a literature review and a product comparison. Pro Search runs a multi-step research plan — clarifying the question, running several searches, reading the results and synthesising an answer — and Deep Research extends that into long, structured reports with dozens of sources. Spaces let teams collect files and threads around a topic so follow-up questions carry the accumulated context. The mobile apps and browser extension make it a natural default search replacement, and Comet extends the idea into an AI-native browsing experience. Free users get generous everyday usage; Pro unlocks frontier models, unlimited advanced searches, file analysis and image generation. For research, competitive analysis, due diligence and any question where a hallucinated answer would be costly, Perplexity is the tool to reach for.