Workday isn't 75% of the ATS market. I checked 337 companies. | ResumeAI<br>Skip to main contentSign InBuild Resume Free

svg]:pointer-events-none [&>svg]:size-3 bg-primary text-primary-foreground [a&]:hover:bg-primary/90">Data4 min read<br>Jun 15, 2026<br>Workday isn't 75% of the ATS market. I checked 337 companies.<br>KZ

Kayvan Zahiri<br>Founder, ResumeAI<br>Kayvan is the founder and lead engineer of ResumeAI. He writes the product and the code, and recently open-sourced the State of ATS 2026 dataset that maps the Applicant Tracking System used by 743 large employers.<br>View on LinkedIn

Last updated June 16, 2026

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Throughout my job search, I've seen a variety of things, with 3000+ applications. Workday isn't 75% of the ATS market. I checked 337 companies.<br>If you have read about applicant tracking systems, there's the claim: Workday runs hiring, and a few vendors own the market.<br>An earlier version of my own dataset put Workday at 75.4% of large employers, with the top three vendors at 93.5%. However, I went and looked at the actual companies, and Workday is around 41%.

Why my number was wrong

The first version of that dataset wasn't really researched. I had an LLM compile it from public info and I didn't check the companies one by one. When I finally went back and verified each employer against its real careers page, I noticed that about half the rows were wrong.<br>When the model didn't know what a company used, it said "Workday." Why? Because Workday is the most common answer.<br>As a result, I threw the guesses out and checked them properly.

You can check any company yourself

Click Apply on a careers page and watch where it sends you. For instance,

myworkdayjobs.com is Workday

boards.greenhouse.io is Greenhouse

jobs.lever.co is Lever

icims.com is iCIMS

oraclecloud.com (look for /hcmUI/) is Oracle

successfactors.com is SAP SuccessFactors

jobs.ashbyhq.com is Ashby

I did this for 337 of the 743 companies in the dataset and:

Workday, 41%. Still the biggest and still the one most worth knowing.

Greenhouse, 17%. The default in venture-backed tech.

SAP SuccessFactors, 7%.

Oracle (Cloud Recruiting plus the old Taleo), 7%. Banks, hospitals, old-line employers.

Proprietary internal systems, 5%. The Apples and Googles rolling their own.

Then: iCIMS 4.5%, Eightfold 4%, Taleo 4%, SmartRecruiters 3%, Avature 2%, Lever 2%, Ashby 2%.

I think it's important because each of these parses a resume a little differently. They weight keywords differently, they mess up on different things, so the same resume will perform differently.<br>337 of 743 are verified. I'm working through them, but a smaller honest number than a big wrong one is more helpful than not.<br>If it's useful: a free checker scores your resume against whatever ATS a given company runs, and the verified data is open if you want to pull it apart yourself. Thanks.<br>Related Resources<br>Free ATS Score Checker →185 Action Verbs for Resumes →50 Resume Summary Examples →Resume Keywords by Industry →Skills Section Guide →Browse Resume Examples by Job Title →

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Popular Skills<br>PythonJavaScriptSQLProject ManagementData AnalysisExcelReactAWSLeadershipCommunicationView all 200+

Reports<br>State of ATS 2026 (743 employers)Which ATS does Workday power?ATS by industryDownload dataset (CSV)

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