Summarize papers, find sources and reason over documents.
Perplexity AI
An AI-powered answer engine that searches the web in real time and returns synthesized answers with linked source citations, rather than a plain list of results.
Elicit / Ought
A research assistant that searches academic literature, extracts key findings from papers, and summarizes them into structured, comparable tables.
Consensus
A search engine that queries peer-reviewed scientific papers to answer questions directly, surfacing supporting citations from the underlying studies.
scite.ai
A research tool that shows how a published paper has been cited elsewhere, classifying each citation as supporting, contrasting or merely mentioning the original claim.
SciSpace
An AI research assistant that helps users read, understand and search scientific literature, including explaining dense passages of a PDF in plain language.
Allen Institute for AI
A free academic search engine that uses AI to generate paper summaries and TLDRs, helping researchers quickly assess relevance across millions of papers.
ResearchRabbit
A citation-graph discovery tool that visualizes connections between academic papers, helping researchers surface related work they might otherwise miss.
Litmaps
A visual citation mapping tool that plots how research papers cite and build on one another, making it easier to trace a field's development.