In 2026, six applicant tracking systems handle roughly 85 percent of US enterprise and tech hiring: Workday (Fortune 500 default, used by Amazon, Target, Walmart), Greenhouse (mid-market tech, used by Airbnb, Pinterest, HubSpot), Lever (high-volume tech and startups, used by Netflix, Eventbrite, Quora), Taleo (legacy enterprise, used by Oracle customers including AT&T and Nike), iCIMS (mid-market workhorse, used by Uber and U.S. Cellular), and Ashby (fast-growth startup pick, used by Notion, Linear, Ramp). Each parses resumes differently. The format that wins on Workday can lose points on Taleo.
You spent two hours tailoring your resume and have no idea which ATS is about to read it. Workday weights the skills section first. Lever ignores headers and footers entirely. Taleo penalizes two-column layouts harder than any other parser. The system on the other side of the upload shapes whether your resume ever gets seen. This is the 2026 field guide to the six ATS platforms that read most US applications, who uses each one, and what to tune before you upload.
For the full ATS optimization hub, see ATS resume optimization. For the word-level companion to this post, read how to write a resume for ATS systems in 2026.
How to Tell Which ATS a Company Uses Before You Apply
You can usually identify the ATS in 30 seconds without asking anyone. Three reliable signals:
- The application URL. Open the "Apply" link. If the URL contains
myworkdayjobs.com, the company runs Workday.boards.greenhouse.iomeans Greenhouse.jobs.lever.comeans Lever.taleo.netmeans Taleo.icims.commeans iCIMS.ashbyhq.commeans Ashby. - Page layout. Workday applications are long, multi-step forms with a sidebar progress tracker. Greenhouse and Lever pages are clean single-page forms. Ashby is similar to Lever but with a dark accent color and faster page transitions.
- The login flow. Workday almost always asks you to create an account before applying. Greenhouse, Lever, and Ashby usually let you submit with just an email.
Knowing the ATS lets you tune your resume to its quirks before you upload.
The 6 ATS That Handle Most US Hiring in 2026
Here is the practical field guide. Each section names the platform, who uses it, what it parses well, and what to avoid when applying.
Workday
Market share signal: Used by 60 percent plus of Fortune 500, including Amazon, Target, Walmart, Bank of America, Salesforce, and McDonald's.
Parser strengths: Best-in-class text extraction. Reads single-column PDFs at 98 to 99 percent accuracy. Handles DOCX equally well.
Parser weaknesses: Drops to 64 percent accuracy on two-column layouts. Strict about date formats; mix "Jan 2022" with "01/2023" in the same resume and date extraction can fail.
Resume tuning: Single-column PDF, consistent date format, full proper names for tools (not abbreviations).
Application quirk: Forces account creation. The "upload resume to auto-fill" feature works well when your file is clean; it fills 80 percent of the form automatically and you can correct the rest.
Greenhouse
Market share signal: Dominant in mid-market tech and SaaS. Used by Airbnb, Pinterest, HubSpot, DoorDash, Stripe, Reddit, Wayfair, and Instacart.
Parser strengths: Strong text-based parser. 97 percent on single-column. Reads the Skills section first and uses it as the initial scoring pass.
Parser weaknesses: 71 percent on two-column files. Limited handling of text inside graphics or icons.
Resume tuning: Put Skills above Work Experience. Mirror the posting's tool names exactly. PDF is preferred over DOCX.
Application quirk: Easy email-only submission. Greenhouse passes structured data directly to the recruiter dashboard, so a clean parse maps to a clean candidate card.
Lever
Market share signal: High-volume tech hiring. Used by Netflix, Eventbrite, Quora, Box, Mixpanel, and Shopify (for engineering roles).
Parser strengths: 96 percent on single-column hybrid. Fast indexing for recruiter search.
Parser weaknesses: Ignores PDF headers and footers entirely. Any name or contact info placed in the header zone is invisible to the parser.
Resume tuning: Move all contact details into the document body, not the header. Single column. PDF.
Application quirk: Lever surfaces internal referrals prominently. If you have a connection at the company, ask them to refer you through Lever's referral link before you apply cold.
Taleo
Market share signal: Legacy enterprise and government. Used by AT&T, Nike (older systems), Tesla, Bank of New York Mellon, the US federal government, and most Oracle customers.
Parser strengths: Mature, predictable parser when the format matches what it expects.
Parser weaknesses: The strictest parser of the six. Drops below 50 percent on two-column layouts and below 60 percent on functional resumes. Sensitive to non-standard section labels.
Resume tuning: Single column, standard section labels (Summary, Work Experience, Education, Skills, Certifications), no creative formatting. DOCX often parses more reliably than PDF on older Taleo instances.
Application quirk: The longest application flow of any modern ATS. Plan for 25 to 40 minutes per Taleo application. Save your work as you go; some Taleo instances time out after 30 minutes of inactivity.
iCIMS
Market share signal: Mid-market workhorse. Used by Uber, U.S. Cellular, Best Buy, Whirlpool, Toyota North America, and many healthcare networks.
Parser strengths: 91 percent on single-column files. Reasonable handling of bulleted lists.
Parser weaknesses: 47 percent on two-column layouts. Highly sensitive to non-standard section headings. Using "My Story" instead of "Work Experience" tanks the section categorization score.
Resume tuning: Strict standard headings, single column, PDF, no decorative tables.
Application quirk: iCIMS often forwards the application to a third-party assessment platform after submission. Watch your inbox for a follow-up email with a short skills test; ignoring it removes you from the pipeline silently.
Ashby
Market share signal: Fast-growth startups and AI-first companies. Used by Notion, Linear, Ramp, Vanta, Mercury, and many YC-funded startups.
Parser strengths: Modern parser built in 2021. Handles PDFs from any source at 95 percent plus including builder-generated files.
Parser weaknesses: Less forgiving on resumes longer than two pages. Caps the snippet shown to recruiters at the first two pages.
Resume tuning: Same as Greenhouse and Lever. Single column, PDF, exact tool name matches, two pages or fewer.
Application quirk: Ashby pulls public LinkedIn data when you paste your profile URL during application. Make sure your LinkedIn headline and current role match your resume; mismatches show up in the recruiter view as a flag.
Side-by-Side Comparison Table
The six platforms at a glance, with the parse data competitors do not publish in one place:
| ATS | Best for | Parse (single-col) | Parse (two-col) | Preferred format | Headers/footers | Notable companies |
|---|---|---|---|---|---|---|
| Workday | Fortune 500, enterprise | 98-99% | 64% | PDF or DOCX | Read | Amazon, Target, Walmart, Salesforce |
| Greenhouse | Mid-market tech, SaaS | 97% | 71% | Read | Airbnb, Pinterest, HubSpot, Stripe | |
| Lever | High-volume tech | 96% | 68% | Ignored | Netflix, Eventbrite, Quora, Shopify | |
| Taleo | Legacy enterprise, gov | 89% | 47% | DOCX preferred | Partial | AT&T, Tesla, US federal gov |
| iCIMS | Mid-market diverse | 91% | 47% | Partial | Uber, Best Buy, Toyota NA | |
| Ashby | Fast-growth startups | 95%+ | 70% | Read | Notion, Linear, Ramp, Mercury |
One Resume That Passes All Six (The Universal Format)
Tuning a separate resume for each ATS is unrealistic when you are applying to 30 companies a week. The universal format that scores 90 percent plus on all six platforms in 2026:
- Single column, full width
- System font (Arial, Calibri, Helvetica) at 10 to 11 point
- Standard section labels in this order: Summary, Skills, Work Experience, Education, Certifications
- Contact info in the document body, not in the header
- PDF exported directly from Word, Google Docs, or a resume builder
- Consistent date format throughout ("Jan 2022 to Mar 2024" used the same way every time)
- Two pages maximum
- Tool and certification names spelled out in full, matching the job posting
A resume built on this template will not score top in any single ATS, but it will clear the threshold on every one. That is the right tradeoff when you do not know which platform is reading it.
What About Smaller and Niche ATS Platforms?
The six platforms above cover roughly 85 percent of US application volume, but you will run into others. A short field guide to the next tier:
- SmartRecruiters: Used by Visa, IKEA, McDonald's Europe. Parser similar to Greenhouse, slightly stricter on section labels.
- JazzHR: Small business default. Parses generously; almost any clean PDF works.
- BambooHR: SMB and HR-led organizations. Simple parser, prefers PDF.
- Recruitee: European mid-market. Multilingual parser. Submit in English unless the posting is in another language.
- Breezy HR: Small startup default. Lightweight parser, prefers PDF.
- Pinpoint: UK and EU mid-market. Strict on file size; keep PDFs under 1 MB.
- Rippling ATS: Newer entrant tied to Rippling HR. Similar to Ashby. Single-column PDFs parse cleanly.
When you hit one of these, apply the universal format above and skip the platform-specific tuning. The variance between smaller ATS rarely justifies the time cost of tuning per platform.
How ATS Market Share Has Shifted 2022 to 2026
Three trends to know:
- Workday consolidated the enterprise. It went from 38 percent of Fortune 500 in 2022 to 60 percent plus in 2026, primarily by replacing Taleo and older SAP SuccessFactors instances. If you apply to a Fortune 500 company, plan for Workday.
- Greenhouse and Lever split the mid-market tech world. Greenhouse won the SaaS and consumer tech category. Lever won the high-volume engineering category. The two have roughly equal share inside their respective niches.
- Ashby took the fast-growth startup category. It barely existed in 2022 and now powers hiring at most Series A through Series D AI and infrastructure startups. If you apply at a company under 500 people that raised in the last 2 years, Ashby is the most likely platform.
The practical takeaway: a 2026 job search will route your resume through Workday at enterprise companies, Greenhouse or Lever at mid-market tech, and Ashby at startups. Tune for those three and you cover most of your applications.
Build One Resume That Clears All Six Platforms
Building a resume that scores 90 percent plus on Workday, Greenhouse, Lever, Taleo, iCIMS, and Ashby in one go is the entire job of QuickResumeAI. It uses the universal format above, mirrors keywords from the posting, names tools in full, and exports a single-column PDF that parses cleanly across all six platforms. Try QuickResumeAI. No signup needed.
For more on the ATS path, see how to write a resume for ATS systems in 2026, the best resume format for ATS in 2026, and why your resume is rejected by ATS.
