Perplexity
An answer engine that searches the web and cites its sources.
FeaturedFreemiumAI Research
Overview
Semantic Scholar, from the Allen Institute for AI, indexes millions of papers and uses AI to surface key findings, influential citations and related work.
Key features
01
TLDR summaries
One-line summaries of papers.
02
Citation insights
See influential citations.
03
Research feeds
Get recommendations for new papers.
Pros & cons
What's great
- Free and non-profit
- Clean, fast search
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