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Evidence synthesis for papers, programs, and decisions. Built for research rather than general chat.
ResearchFree tier, then paid plans for deeper analysis.Added Aug 9, 2026
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Rank 01
FeaturedResearch chat that answers with the sources attached. Use it when a paragraph without links is not enough.
Visit perplexity.ai02
Evidence synthesis for papers, programs, and decisions. Built for research rather than general chat.
ResearchFree tier, then paid plans for deeper analysis.Added Aug 9, 2026
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Search peer-reviewed papers and ask questions against that literature.
ResearchFree tier, then paid plans for more searches.Added Jul 28, 2026
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Google's research notebook, the product that was NotebookLM. Summaries grounded in sources you upload.
ResearchFree with a Google account. Limits depend on the account.Added Oct 8, 2026
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Read a research paper with an explanation beside the PDF, and ask questions of the text.
ResearchFree tier, then paid plans for more papers.Added Feb 20, 2026