Perplexity AI

Perplexity AI is an American conversational search engine company, founded in August 2022 and headquartered in San Francisco, that delivers cited, real-time answers by combining large language models with live web indexing. As of March 2025, its flagship product, Perplexity Pro, processes over 100 million queries monthly, using a model-agnostic architecture that selects among models like GPT-4, Claude 3.5, and its own Sonar reasoning system, which achieved a 92.4% accuracy score on the SimpleQA benchmark. The platform distinguishes itself by surfacing attributed sources alongside generated responses, functioning as a conversational research tool rather than a traditional link-based search engine. The company closed a $73.6 million Series B in January 2024 at a $520 million valuation, with backers including Nvidia, Jeff Bezos, and Institutional Venture Partners. Perplexity matters now because it directly challenges Google’s search dominance with an ad-free, attribution-driven interface, reshaping how information is synthesized and consumed in an era of AI-driven content.

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