Lens.org
Scholarship and patents in one place — the open platform linking research to innovation.
Tier 2 Open AccessFreemium
Research Database Directory
Every research database, reviewed.
Connected Papers
A visual map of a research field — find the papers around the one you already know.
Tier 3 ToolsFreemium
HathiTrust
A massive digital library of scanned books — the scholarly record, digitized.
Tier 3 Open AccessFreemium
Statista
The statistics portal that turns scattered market and survey data into citable charts — fast, broad, and secondary.
Tier 1 CorporateFreemium
Dimensions
Digital Science's linked-data platform — the database that connects publications to the grants, patents, clinical trials, and policy documents around them.
Tier 1 AcademicFreemium