The Emerging Sources Citation Index (ESCI) was launched in late 2015 by Thomson Reuters as a new database in Web of Science.
This index was produced by Clarivate Analytics since 2017, which includes over 3,000 journals from various areas of research.
The journal’s index in this ESCI will not come with an impact factor(IF). However, each journal in this new index will be evaluated every year and those qualified will be transferred to SCIE.
The main aim of the ESCI is to ensure the important research works are visible in the Web of Science Core Collection even if it is not yet internationally recognized.
ESCI journals may have chances to be included in the SCIE when the journal continuously maintains its good quality of the publication.