The following is a list of the Indexing databases that cover hosted by Knowledge E:
  • Google Scholar                
  • Microsoft Academic Research 
  • Thomson Reuters (ISI): Emerging Sources Citation Index          
  • PubMed Central (PMC)                
  • Scopus         
  • Chemical abstract services
  • CAB Abstract
  • Index Copernicus 
  • Index Medicus for the WHO Eastern Mediterranean Region (IMEMR)   
  • Directory of Open Access Journals (DOAJ)                  
  • EBSCO
  • ISC   
  • Magiran
  • Scientific Information Database (SID)               
  • Iran Medex     
  • Semantic Scholar  
  • Bioline International   
  • Long-term archiving: To preserve scholarly literature published in electronic form and to ensure that these materials remain available to future generations of scholars and researchers, Knowledge E content is archived in Portico, a not-for-profit organization with a mission and singular focus to provide a permanent archive of electronic scholarly content. Portico representative offices are located in New York, New Jersey, and Michigan.