Essential Science Indicators

The most influential with easier than ever access


ESI Screen shot


Answer key questions for your institution like:

  • What are the most cited papers in chemistry?
  • What are the emerging research areas in agricultural sciences?
  • What country has the highest impact in physics?
  • Who are the most cited authors in the field of biology & biochemistry?
  • What are the top journals in pharmacology?

About Essential Science Indicators

Essential Science Indicators is part of Journal Evaluation and Highly Cited Research — single environment for research, bibliometrics and evaluation. It offers better support of your long-term vision and keeps you informed of the latest trends with a multifaceted analytics view.

Conduct on-going, quantitative analyses of research performance and trends in science.
Rank top scientists, institutions, countries, and journals in 22 specific fields of research based on
journal article publication counts and citation data.

What's new with
Essential Science Indicators

Reliable data combined with enhanced functionality


ESI Custom

Customize Your Analysis & Build Reports

Determine the influential individuals, institutions, countries, journals, and papers in 22 broad fields of study in addition to emerging research trends that could impact your work. Choose your results list, filter by entities, set custom limits, customize your view, see all Fields data, search within results, and save and export your work.

ESI Unified Data

Unified Data

Improved data unifications, as well as changes to indicators requested by you, such as basing calculations on publication year. These changes result in consistency across the product platform, making data more meaningful and more reliable than ever.

ESI analyze

Enhanced Search with Analytics

Documents in Essential Science Indicators link directly to the Web of Science for more detailed information, creating a seamless experience for your discovery and analytics needs. In addition, Highly Cited and Hot Paper distinctions are featured in the Web of Science itself, assisting your discovery process.

Using Essential Science Indicators



  • Research performance of researchers, institutions, nations, and journals
  • Identify significant trends in 22 broad fields in science and social science


  • Top countries, journals, scientists, papers, and institutions by field of research
  • Determine research output and impact in specific fields


  • Potential employees, collaborators, reviewers, and peers.

ESI in action:
Highly Cited Researchers

Thomson Reuters published the 2014 Highly Cited Researchers List, recognizing approximately 3,000 researchers from 22 fields of study.

We use the highly cited publications dataset within ESI to identify these top researchers . These papers represent the top one percent of articles in each of the Essential Science Indicators categories.

Highly Cited Researchers Categories

Clinical Medicine Materials Science Psychiatry/Psychology
Chemistry Engineering Microbiology
Physics Immunology Agricultural Sciences
Biology & Biochemistry Social Sciences, General Space Science
Molecular Biology & Genetics Environment/Ecology Computer Science
Neuroscience & Behavior Pharmacology & Toxicology Economics & Business
Plant & Animal Science Geosciences Mathematics


Supporting & Understanding
Essential Science Indicators

“By providing metrics and thresholds for people, papers, subjects, publications, institutions, and countries you can identify influential authors and articles across the research community and factor emerging trends into your programs, making it easier to identify new programs or policy shifts earlier and track their on-going impact.”



Get trained on how to use the resources to support your scholarly goals.Take advantage of our free training opportunities.


  • Get 24/7 access to Thomson Reuters online support.
  • Visit our Customer Support page for a complete view of support options.


Tracking trends and performance since 1989.


Thomson Reuters ScienceWatch is an open web resource for science metrics and research performance analysis. Since 1989, ScienceWatch has offered features that include data and commentary on the people, places and topics at the forefront of science today, illustrating the power of bibliometrics for providing a prospective and providing a unique view into the research landscape. As part of the Thomson Reuters research analytics suite of solutions, ScienceWatch highlights the important role of research evaluation and management in support of strategic decision-making.