Top ATS Systems Recruiters Use in 2026 (And How They Affect Resumes)

Most candidates think of "the ATS" as a single thing—a faceless system that filters resumes before humans see them. In reality, it is a category of products that vary considerably in how they parse documents, score candidates, and route applications. Knowing which system a company uses is not always possible, but knowing the major players and how they differ helps you produce a resume that survives any of them rather than optimizing for the wrong one.

This guide walks through the ATS systems most frequently encountered in 2026, what each one prioritizes, and how that affects what your resume should look like before you submit it. The good news: a resume that works well across the major systems looks similar regardless of vendor. The bad news: the small differences occasionally matter, and the worst layouts fail in some systems even while passing others.

The major ATS players in 2026

Workday

The most common ATS at large enterprises in North America. Workday parses resumes into structured fields and also has candidates manually fill in much of the same information through long application forms. Workday is relatively forgiving on layout—it tends to handle two-column resumes better than older systems—but the form- filling step means recruiters often see a Workday-rebuilt version of your resume, not the original PDF.

Implications for your resume: Optimize for clean parsing of work history, dates, and education. Use predictable date formats (MM/YYYY or Month YYYY). Avoid embedding contact info inside graphics or headers Workday might miss when it parses for the form.

Greenhouse

Common at venture-backed and mid-to-large tech companies. Greenhouse is hiring-team-centric: recruiters and hiring managers see your resume directly, often in PDF form, and most candidate evaluation is done by humans rather than algorithmic scoring. Greenhouse parses resumes into a candidate profile but human reviewers can still see the original document.

Implications for your resume: Layout flexibility is higher because humans see your actual document. Single-column reverse-chronological still wins, but you have more room for thoughtful design without hurting your chances.

Lever

Similar profile to Greenhouse, common at startups and mid-sized tech companies. Lever's parser is reliable for standard layouts and the candidate experience is straightforward. Like Greenhouse, the system is more of a coordination tool for hiring teams than an algorithmic gatekeeper.

Implications for your resume: Same as Greenhouse. Single-column, clean fonts, parseable section headings.

Taleo

Older and still very common at large enterprises, government contractors, and traditional industries. Taleo is the system most likely to fail on complex layouts. It is also the one most likely to be paired with strict keyword matching at large employers.

Implications for your resume: Aggressively simple. Single column, standard fonts, no sidebars, no text in images, no fancy bullet characters. If you suspect you are submitting through Taleo (large employer, older application portal, lots of form fields to refill), default to your simplest layout.

iCIMS

Common at large employers across industries. iCIMS sits between Taleo and Workday in flexibility—generally better at modern layouts than Taleo, somewhat less polished than Workday. Like Taleo, it is often paired with keyword filters that recruiters use for initial screening.

Implications for your resume: Mirror clear, accurate keywords from the posting. Single column is the safe default. Avoid graphic elements that might break parsing.

Ashby

Newer system increasingly common at growth-stage tech companies. Ashby is hiring-team-centric like Greenhouse and Lever, with strong candidate experience and reliable parsing. Resumes are visible to reviewers in their original form.

Implications for your resume: Clean modern layout works well. Single column is still safest.

SmartRecruiters, BambooHR, Jobvite, JazzHR

Mid-market ATS systems, common at smaller businesses and growth-stage companies. Generally more flexible on layout than enterprise systems, less likely to apply algorithmic keyword filtering. Standard parsing considerations apply: single column wins, clean fonts win, predictable date formats win.

How to tell which ATS a company uses (when you can)

Sometimes it is obvious from the URL of the application portal:

• boards.greenhouse.io in the URL means Greenhouse.
• jobs.lever.co means Lever.
• jobs.ashbyhq.com means Ashby.
• myworkdayjobs.com or a workday subdomain means Workday.
• taleo.net or oracle hosted URLs typically mean Taleo.
• icims.com in the URL means iCIMS.

That information is rarely actionable—you should still produce a single resume that works across all of them—but it is a useful tell when you are trying to understand why an application disappeared or what to prioritize on a high-stakes submission.

What every ATS scans for

Despite their differences, all major ATS systems try to extract the same core data from your resume:

1. Contact information (name, email, phone, location)
2. Work history (employer, title, dates, bullets)
3. Education (institution, degree, dates)
4. Skills (often via keyword matching against the body)
5. Optional: certifications, licenses, languages

A resume that makes those five categories easy to extract will parse cleanly in any modern ATS. The categories that get scrambled most often are work history (when dates do not align with employers) and skills (when they live in graphics or columns). Both are layout problems, not content problems.

Layout choices that work across all of them

The same set of decisions produces ATS-resilient resumes regardless of vendor:

• Single column for the body. Text in sidebars sometimes parses out of order in older systems. The visual savings are not worth the parsing risk.
• Standard fonts. Calibri, Arial, Helvetica, Georgia, Times New Roman, and modern sans-serifs like Inter and Source Sans all work. Avoid display fonts or scripts.
• Predictable date formats. "Mar 2020 – Present" or "03/2020 – present" beats "Mar '20 → Now" or other stylized variations.
• Common section headings. "Experience," "Education," "Skills." Save personality for bullet wording, not section labels.
• Real text, not images. Never paste your contact info as part of a header graphic.
• Standard bullet characters. Use a real • bullet, not a custom shape that might fail to render.

Keyword matching: how it works in 2026

At large employers, ATS systems often score resumes against the job description using keyword matching. The scoring algorithms vary but the concept is similar across vendors: count or weight occurrences of terms from the posting in your resume, with bonuses for terms appearing in specific fields like skills or job titles.

Crucially, modern ATS keyword matching is generally not strict pattern matching. Most systems handle synonyms and plurals reasonably well; for example, "React.js" in your resume usually matches a posting that says "React." What they do not handle well is when the concept appears in your bullet but the specific word does not. If a posting says "experience with serverless architectures" and your bullet says "migrated from EC2 to Lambda," some systems will miss the match. The fix is to surface both: include the abstract term where it fits naturally, especially in the skills section.

Full guidance on extracting and using keywords from a posting is in our resume keywords guide.

What ATS systems do not do

Two persistent myths worth dispelling:

• ATS systems do not auto-reject resumes. They rank and filter, but most resumes are seen by a human at some point. Where ATS hurts you is by ranking your resume below candidates who match the posting more cleanly—not by silently deleting your application.
• ATS systems do not penalize you for being "too perfect." A resume that mirrors the posting closely will not get flagged as suspicious by the ATS. Recruiters might notice when human review arrives, but the system itself is not flagging you.

Optimize for the simplest layout that still represents you well, and you will be fine in any ATS. Optimize against a specific vendor and you might lose to candidates with a more universal resume.

The practical takeaway

Do not produce three different resumes for three different ATS systems. Produce one strong, simple, single-column resume that survives any of them. Optimize the content with the ATS-friendly resume guide and the keyword pass from the posting. If a specific high-stakes application is going through a system you know is finicky—Taleo or older iCIMS deployments are the usual culprits—lean on the simplest possible version of your layout for that submission. For everything else, the universal version is sufficient.