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Perplexity
Elicit
Semantic Scholar
Connected Papers
Litmaps
ResearchFreemium4.2
Literature mapping and discovery. Seed-based exploration and alerts.
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Perplexity AI unlocks the power of knowledge with information discovery and sharing. It is an "answer engine" that provides accurate, trusted, and real-time answers to any question.
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AI research assistant. Find papers, summarize, and extract claims.
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AI-powered academic search. Free, with citation graphs and summaries.
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Visual graph of related papers. Explore literature from one seed paper.
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