Taleo, Manatal, iCIMS, Jobvite, Greenhouse and SmartRecruiters are some of the most commonly used applicant tracking systems. There are countless more ATS that companies use depending on their specific needs. For example, Taleo is great for large companies with a high influx of applications, whereas JazzHR is preferred by smaller businesses. If you apply for a job via electronic application, your resume will most likely go through an ATS.