Essential Science Indicators (ESI) is an analytical tool that helps you identify top-performing research in Web of Science Core Collection. ESI surveys more than 11,000 journals from around the world to rank authors, institutions, countries, and journals in 22 broad fields based on publication and citation performance.

Essential Science Indicators is sourced from the Science Citation Index-Expanded (SCIE) and the Social Sciences Citation Index (SSCI).
Only the most highly cited individuals, institutions, journals, countries and papers are included in ESI, see https://clarivate.libguides.com/esi.