Sources

Six research databases. One brief. One email.

Relaylit queries PubMed, Europe PMC, arXiv, Semantic Scholar, Crossref and OpenAlex in a single pass — then AI-ranks every result 0 to 100 against your plain-language brief. Six sources, one email.

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Source

PubMed

35M+ biomedical citations from MEDLINE, life-science journals, and online books.

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Europe PMC

42M+ life science citations, including preprints and full-text open-access papers.

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arXiv

2.4M+ preprints in physics, mathematics, computer science, and quantitative disciplines.

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Semantic Scholar

200M+ academic papers with citation graphs and AI-extracted metadata across disciplines.

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Crossref

155M+ records covering journals, conference proceedings, books, and preprints with DOIs.

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OpenAlex

Free, open replacement for Microsoft Academic Graph with 250M+ works across every discipline.