Perplexity is an AI-powered answer engine that delivers accurate, real-time answers with cited sources. Unlike traditional search engines, Perplexity combines a conversational interface with live web search, pulling information from across the internet and presenting it with inline citations.

Key features include Pro Search for complex multi-step queries, Collections for organizing research, file upload support (PDFs, images, and documents), and Spaces for collaborative knowledge sharing. Perplexity can understand context across follow-up questions and supports multiple specialized search modes including academic, video, and news filters.

Available via web interface and mobile apps (iOS and Android), with a premium tier that unlocks higher usage limits, priority access to advanced models, and API access for developers.