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What's inside
Counts from our own catalogue, refreshed every night and rounded down.
- Research works
- 330M+
- 790K+ works added in the last 7 days
- Updated hourly
- Open-access works
- 180M+
- 170M+ links to free copies
- Updated hourly
- Citation links
- 380M+
- Clinical trial registrations
- 600K+
- 110K+ links from trials to papers
- Updated daily
- Patents
- 9.2M+
- 22M+ patent citations to research
- Updated weekly
- Funded research projects
- 85K+
- 470K+ links from grants to papers
- Updated weekly
- Regulatory records
- 590K+
- Updated weekly
- Company filings
- 410K+
- 8,023 companies with public filings
- Updated daily
- Journals
- 220K+
- 70K+ journals ranked within their field
- Author profiles
- 780K+
- Research institutions
- 120K+
- Retraction notices
- 62K+
- 3,700 expressions of concern
Research works by type
- Journal articles160M+
- Preprints7.5M+
- Reviews1.4M+
- Books and chapters26M+
- Conference papers370K+
- Theses1.9M+
- Datasets67M+
From open scholarly sources such as PubMed, arXiv and Crossref; clinical trial registries; patent offices; regulators; funders.