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Research & AI Search Engines

Citation-backed search engines, academic paper summarizers, and deep literature research bots.

9 tools in this category Filter in global directory ➔
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Consensus

by Consensus
freemium
🔍 Research & AI Search Engines

AI search engine indexing 200M+ academic research papers to provide evidence-based answers.

  • Indexes 200 million+ peer-reviewed academic papers via Semantic Scholar
  • Consensus Meter indicating percentage agreement among scientific studies
  • Copilot agent for writing synthesized literature reviews
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Elicit

by Elicit
freemium
🔍 Research & AI Search Engines

AI research assistant automating literature reviews and data extraction across scientific papers.

  • Extracts structured data columns directly from uploaded research PDFs
  • Semantic search across 125 million+ academic research papers
  • One-sentence summaries of paper findings
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Genei

by Genei Ltd
🔍 Research & AI Search Engines

AI research tool that automatically summarizes background reading and extracts key data from PDFs.

  • Automated PDF summarization and key data extraction
  • In-document AI question answering
  • Note-taking editor with citation references
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NotebookLM

by Google
free
🔍 Research & AI Search Engines

Personal AI research notebook grounded strictly in your uploaded documents and notes.

  • Grounded strictly in user-uploaded sources (zero web hallucination)
  • Audio Overview generates photorealistic two-host podcast audio conversations
  • Inline source citation links referencing exact PDF page paragraphs
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Perplexity AI

by Perplexity AI, Inc.
freemium
🔍 Research & AI Search Engines

Citation-backed conversational search engine delivering direct, verified answers.

  • Pro Search mode with multi-step reasoning and Python code execution
  • Inline citations for every fact back to original web sources
  • Focus Mode filters (Academic papers, YouTube, Reddit, Writing)
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SciSpace (Typeset.io)

by SciSpace
freemium
🔍 Research & AI Search Engines

All-in-one AI platform for searching, reading, and understanding scientific research papers.

  • SciSpace Copilot for explaining highlighted PDF math/text in plain language
  • Database of 270M+ research papers
  • Instant translation into 75+ languages
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Scite.ai

by Scite Inc.
🔍 Research & AI Search Engines

Smart citation research platform that analyzes whether academic papers support or contrast findings.

  • Smart Citations showing citation context and supporting/contrasting classification
  • Assistant for asking research questions grounded in scientific literature
  • Indexes over 1.2 billion citation statements
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Semantic Scholar

by Allen Institute for AI
free
🔍 Research & AI Search Engines

Free AI-powered academic search engine indexing over 200M+ research papers.

  • Free access to 200M+ indexed research papers
  • AI-generated TLDR paper summaries
  • Citation velocity and influential citation tracking