Coverage
The Keenious index
Statistics for the Keenious search index, a curated subset of the OpenAlex catalogue. Data as of 23 October 2026.
Publications
174,164,391 publications by publication year, field, language and publication type.
Publications by year
4.9M publications from before 1950 are not shown. Counts for the current year are incomplete.
Publications by field
From the OpenAlex topic classification, which assigns each publication one primary topic.
- Medicine33.2M 19.1%
- Social Sciences21.9M 12.6%
- Engineering21.5M 12.3%
- Arts and Humanities13.5M 7.7%
- Computer Science9.2M 5.3%
- Biochemistry, Genetics and Molecular Biology8.7M 5.0%
- Agricultural and Biological Sciences8.2M 4.7%
- Environmental Science6.8M 3.9%
- Physics and Astronomy6.6M 3.8%
- Materials Science5.1M 2.9%
- Business, Management and Accounting4.8M 2.7%
- Psychology4.7M 2.7%
Publications by language
- English133.6M 76.7%
- Spanish7.5M 4.3%
- French5M 2.9%
- German4.3M 2.5%
- Portuguese3.5M 2.0%
- Indonesian3.1M 1.8%
- Russian2.5M 1.4%
- Japanese2.3M 1.3%
- Chinese2.2M 1.2%
- Other languages2M 1.1%
- Korean1.7M 0.99%
- Italian1.5M 0.86%
Publications by type
- Articles151.1M 86.8%
- Conference papers14.2M 8.2%
- Preprints4.2M 2.4%
- Books3.7M 2.1%
- Reviews971.4K 0.56%
Record completeness
Share of publications with each metadata field present in the OpenAlex record.
- DOI70.7%
- Abstract62.0%
- Reference list48.1%
- Cited by at least one publication in the index51.2%
- Author affiliation58.2%
- Funder16.0%
- PubMed ID21.9%
- Licence21.1%
- PDF link26.1%
Open access
Open access status from OpenAlex, which uses Unpaywall data. Search results link to the open access copy where one exists.
70,870,305 of 174,164,391 publications are open access.
Publications by open access status
- Gold6.1% · 10.6MPublished in a fully open access journal
- Diamond9.8% · 17MPublished in a fully open access journal without article processing charges
- Hybrid4.4% · 7.6MPublished under an open licence in a subscription journal
- Bronze6.3% · 10.9MFree to read on the publisher site, without an open licence
- Green14.2% · 24.7MPaywalled at the publisher, open access copy in a repository
- Closed59.3% · 103.3MNo open access copy found by OpenAlex
Share of publications that are open access, by year
Share of publications that are open access, by field
- Mathematics54.7%
- Agricultural and Biological Sciences47.9%
- Business, Management and Accounting47.7%
- Social Sciences46.2%
- Economics, Econometrics and Finance45.2%
- Environmental Science44.6%
- Biochemistry, Genetics and Molecular Biology44.4%
- Dentistry43.7%
- Psychology43.7%
- Decision Sciences43.6%
Peer review
Peer review status is derived from the Norwegian Scientific Index, maintained by the Norwegian Directorate for Higher Education and Skills (HK-dir). Publications in venues on level 1 or 2 are marked as peer reviewed. Level 1 requires external peer review.
76,830,101 of 174,164,391 publications are in level 1 or 2 venues.
Publications by venue level in the Norwegian Scientific Index
- Level 210.9% · 18.9MHighest level
- Level 133.3% · 57.9MApproved as scientific. Requires external peer review
- Level 03.8% · 6.6MAssessed and not approved as scientific
- Not in the register52.1% · 90.8MNot assessed by the register, including repositories and preprint servers
Venues in the register: 29.5K of 189.6K. Publications in level 0 venues and in venues outside the register have peer review status unknown.
Share of publications in level 1 or 2 venues, by year
Share of publications in level 1 or 2 venues, by field
- Neuroscience65.0%
- Chemistry65.0%
- Materials Science64.6%
- Biochemistry, Genetics and Molecular Biology64.0%
- Chemical Engineering61.4%
- Immunology and Microbiology57.9%
- Energy57.9%
- Physics and Astronomy57.9%
- Mathematics54.1%
- Pharmacology, Toxicology and Pharmaceutics53.3%
Study design
Study design as classified by OpenAlex. Search results can be filtered by study design.
18,129,922 of 174,164,391 publications have a study design.
Publications with a study design, by design
Share of the 18.1M publications with a study design. Randomized controlled trials are also counted as clinical trials, meta-analyses as systematic reviews.
- Observational Study12.4M 68.6%
- Case Report3M 16.3%
- Clinical Trial1.7M 9.1%
- Randomized Controlled Trial575.9K 3.2%
- Systematic Review993.8K 5.5%
- Meta-Analysis355K 2.0%
- Study Protocol83.9K 0.46%
Share of publications with a study design, by year
Share of publications with a study design, by field
- Medicine32.6%
- Dentistry28.7%
- Psychology24.8%
- Nursing21.8%
- Health Professions20.6%
- Immunology and Microbiology15.5%
- Neuroscience11.8%
- Business, Management and Accounting11.8%
- Pharmacology, Toxicology and Pharmaceutics11.0%
- Biochemistry, Genetics and Molecular Biology8.5%
Authors, venues and institutions
Authors, venues and institutions with at least one publication in the index.
Authors
Authors with an ORCID iD: 15.9%.
Authors by number of publications
- 1 publication32.9M 49.3%
- 2 to 924.6M 36.8%
- 10 to 998.5M 12.8%
- 100 to 999782.2K 1.2%
- 1000 or more7.2K 0.01%
Venues
Venues in the Directory of Open Access Journals: 21,697 (11.4%).
Venues by type
- Journal159K 83.9%
- Ebook platform16.6K 8.7%
- Conference5.9K 3.1%
- Book series5.3K 2.8%
- Repository2.7K 1.4%
- Other104 0.05%
Venues by Norwegian Scientific Index level
- Level 22.2K 1.2%
- Level 122.4K 11.8%
- Level 04.9K 2.6%
Institutions
Institutions by type
- Company29.7K 24.1%
- Education29.3K 23.8%
- Nonprofit15.5K 12.6%
- Healthcare15.1K 12.2%
- Facility14.8K 12.0%
- Government8.7K 7.0%
- Other7.1K 5.8%
- Archive2.5K 2.1%
- Funder621 0.50%
Institutions by country
- United States28.3K 23.0%
- Japan9.4K 7.6%
- China7.2K 5.9%
- United Kingdom6.9K 5.6%
- France5.7K 4.6%
- Germany5.1K 4.1%
- India4.1K 3.4%
- Canada3.5K 2.9%
Curation and updates
The index excludes other record types, retracted works, journal front matter, duplicates, incomplete records and venues that publish mostly non-research content. It is updated weekly from OpenAlex.
OpenAlex records
- In the Keenious index174,164,391 (37.5%)
- Excluded290,601,094 (62.5%)
The OpenAlex total includes 137.8M records in its expansion corpus, mostly datasets and repository records. 12.1M of these are in the Keenious index.
Search the index
Free on the web, in Word and in Google Docs.