May 21, 20264 min readindexcoverage
300M+ papers and counting: our research coverage
We index work from every major source — OpenAlex, PubMed, arXiv, bioRxiv, PMC, CrossRef and more — so you can search the world's research from one place.
If a paper exists, you should be able to find it. That's our north star.
NobleBlocks indexes work from every major scholarly source on the planet — peer-reviewed journals, preprint servers, conference proceedings, theses, datasets, and books. Together that's more than 300 million records and growing every day.
What we cover
- Peer-reviewed journals across every discipline (life, physical, social, health sciences, humanities).
- Preprints from arXiv, bioRxiv, medRxiv, SSRN, ChemRxiv and more.
- Open access full-text from PubMed Central, Europe PMC, DOAJ.
- Author profiles, institution profiles, journal profiles, and the OpenAlex topic taxonomy.
- Citation graphs connecting papers across decades.
We refresh daily. New papers show up in search within hours of being indexed upstream.
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