Free tools / Which ATS?

Free tool · no sign-up

Which ATS does this company use?

Type a company website. You get its applicant tracking system, the public job board, the number of open jobs, and every ATS switch we can date since 2023. Recruiters, sales teams and HR-tech vendors use it to qualify accounts.

Try an example

ATS market share

Among the employers we track, Greenhouse, Ashby and Workday lead, and Ashby grew fastest since 2023. Monthly shares and every dated switch: the free ATS market share report. The companies that switched in 2026: a CSV. Companies per vendor: ATS vendors.

For developers and AI agents

The same answer is one API call, without a key up to 300 calls a day per IP on these routes (a free key gives 1,000 calls a month):

  • GET /v1/companies/{domain}
  • GET /v1/ats/switches?domain=
  • GET /v1/companies/{domain}/history

Base URL https://api.arcadiumdata.io. Every route in the API guide and the OpenAPI document; agents can use the MCP server.

Questions

How do you know which ATS a company uses?

We read the public job boards that applicant tracking systems host for employers (Greenhouse, Workday, Ashby, Lever, SmartRecruiters, Workable, Personio, Teamtailor, Recruitee, Oracle) every day and tie each board to the employer’s website domain.

How do you date an ATS switch?

From the public web archive (Common Crawl, monthly since February 2023): the month the new board first appears or the old one disappears. Each switch has a confidence; moves away from Lever in late 2025 fall into an archive gap and are marked low.

Can I look up a whole list?

Yes: the ATS technographics file covers more than 11,000 companies (free 100-row sample on the datasets page), and a free API key checks up to 50 domains per call.

What if a company is not found?

It has no public job board we know of yet, or it posts jobs only on its own site. Sign up and add it to a watchlist: we start reading it.

More free tools

Is it hiring?

Open jobs of any company by function and country, the monthly trend since 2023, the share of job ads that state pay and the latest hiring events.

Tender winners

Pick a country, a CPV sector or a keyword and see which organisations won the most public contracts in the last 12 months, which buyers award the most, and the latest award notices.

Posted pay

Posted-pay bands (25th percentile, median, 75th percentile, in EUR a year) for a job title in a country, from employer job ads that state pay, with the number of postings and employers behind each figure.

Company card

One company website, one card: hiring and job board, tools named in job ads, Shopify store, public contracts won, reviews and the dated change events of the last 90 days.

Hiring badge

A live "we are hiring" badge or widget for a careers page, a README or an article: the open-jobs count of a company, updated daily.