Perplexity AI

Free tier

AI-powered search engine that answers questions with cited, up-to-date sources.

Free tier available·All audiences·Powered by Perplexity / OpenAI / Anthropic·API available

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Key strengths

real-time web searchcited sourcesSonar APIfollow-up questions

Free tier + paid plans · from $20 USD/mo

San Francisco, US

Founded 2022

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Perplexity's Sonar API wraps their search-augmented LLM as an OpenAI-compatible endpoint. Models: sonar-small-online, sonar-large-online, sonar-huge-online. Each response includes citations array with source URLs and snippets. Ideal for RAG pipelines needing real-time grounded answers.

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