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1. Perplexity
An AI answer engine that gives sourced answers with a citation on every claim.
- Free plan
- From $17/mo
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2. Elicit
An AI research assistant that searches papers and pulls answers into tables.
- Free plan
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3. Consensus
An AI search engine that finds answers in peer-reviewed research papers.
- Free plan
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4. Scite
Searches scholarly articles and shows if later research supports or disputes a claim.
- Free trial
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5. SciSpace
An AI platform to find, read, analyse and write about scientific papers.
- Free plan
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6. Semantic Scholar
A free AI-powered search tool for scientific literature, from the nonprofit Ai2.
- Free plan
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7. ResearchRabbit
Finds related research from papers you like and maps how they connect.
- Free plan
- From $10/mo
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8. Undermind
An AI research assistant that searches scientific papers and builds reports from them.
- Free plan
- From $16/mo
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9. Humata
Answers questions from your PDFs and documents, with citations back to the source.
- Free plan
- From $9.99/mo
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10. ChatPDF
Lets you chat with PDFs and other files to summarise them and find answers fast.
- Free plan
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11. You.com
Offers web search and research APIs that give AI apps live, cited web results.
- Free plan
- From $5 per 1K chars
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12. Exa
An AI search engine and API that finds web pages, people and companies for your agents.
- Free plan
- From $4 per 1K chars
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13. Paperguide
An AI workspace to find, organise and write up research papers with citations.
- Free plan
- From $12/mo
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14. Litmaps
Maps research papers so you can find related work and track new ones.
- Free plan
- From $10/mo
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15. Felo
A multilingual AI search tool that also creates slides, mind maps and docs.
- Free plan
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16. Paperpal
An AI writing and research assistant for academic papers.
- Free plan
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17. Anara
Answers questions about your papers, with each answer linked to its source passage.
- Free plan
- From $8/mo
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18. Kagi
A paid, ad-free search engine with an AI assistant and no trackers.
- Free trial
- From $5/mo
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19. AnswerThis
An AI research assistant that finds papers and writes cited literature reviews.
- Free plan
Prices can change. Check each tool's website for the latest pricing.