Discover 239.376.621 research papers


The database consists of 240,627,322 works, of which 36,713,328 are available with full text PDFs.

Are you interested in using at your institution? Reach out and a member of our team will get back to you.

Here is how we compare to other database and research tools: vs Semantic Scholar / vs CORE / vs Internet Archive Scholar / vs Unpaywall / vs Web of Science / vs Scopus / vs Dimenions
Name of DatabaseNumber of WorksNumber of full-text PDFsCostParent Company
Semantic Scholar203,000,000 18,100,000FreeAllen Institute for Artificial Intelligence
CORE207,000,000 29,800,000 2FreeOpen University
Internet Archive Scholar124,280,808 332,073,200 3FreeInternet Archive
Unpaywall 32,696,938 4FreeOurResearch
Web of Science193,000,000 5 $100,000+ 7Clarivate Analytics
Scopus87,000,000 6 $100,000+ 7Elsevier
Dimensions129,329,309 839,036,117 8$23,000+ 9Digital Science & Research Solutions Ltd
1 Fetched on August 12, 2022 from
2 Fetched on August 12, 2022 from and
3 Fetched on August 12, 2022 from, the data provider for Internet Archive Scholar.
4 Fetched on August 12, 2022 from
5 Fetched on August 12, 2022 from
7 It’s difficult to accurately find the cost of Web of Science and Scopus.
Here is what we do know:
The Texas A&M University pays $212,000 for Web of Science and $140,000 for Scopus.
They had 242,331 searches for WoS (=$0.88/search) versus 69,134 searches for Scopus (=$2.02/search).
See their report here

Arizona University paid around $170,000 for Web of Science.
120,907 searches were done on Web of Science at Arizona University, at a cost of $1.74 per search.
See here
8 Fetched on August 12, 2022 from
9 Like with Web of Science and Scopus, it’s hard to find pricing online for Dimensions. This number is from stands on the shoulders of friends. We could never do this work alone, and are indebted to the sources we get our data from.