OpenAlex
openalex.org
A fully open catalog of the world's research output — over 250 million works with citations, author information, and institutional affiliations, free to query.
Why it is useful
The open alternative to Elsevier's Scopus and Clarivate's Web of Science — both of which are expensive institutional subscriptions. OpenAlex offers comparable coverage with a fully open API, making it the best choice for building bibliometric tools or conducting large-scale academic research analysis. The citation graph is particularly useful for understanding how ideas propagate across disciplines.