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TheirStack

Tracks job postings and technology usage data to find companies by the software they run and their buying signals.

From $49/moActively maintained

HRData extraction
theirstack.com ↗XLinkedInYouTube
Open theirstack.comAlternativesSet it up for my teamIs TheirStack yours? Claim the card →
At a glanceswept Oct 14, 2026

≈ 17.7kvisits/mo

Use not read yet · estimate, read Oct 14, 2026

  • TheirStack17.7k
  • #1 Gusto1.7M
For
Sales and marketing teams who want to find companies by the technology they use or their hiring signals.
Price
From $49/mopricing page, read Oct 15, 2026
Activity
Actively maintainedsite updated 6 days ago
Company
THEIRSTACK SL · since 2022privacy policy · per their site
Runs as
API
Used for
  • find companies using a specific software technology
  • identify companies hiring for relevant job titles
  • enrich a lead list with tech stack data
read off theirstack.com on Oct 15, 2026
Worth knowingcomputed from what we read · each with its source
  • Used more than 89% of the 275 tools on its shelfINITE Atlas →
  • On the web since 2022, older than 75% of its shelfINITE Atlas
  • Has an MCP server (1 in the registry)public registry →
  • Publishes llms.txt, a file written for AI assistantstheirstack.com ↗
Pricingpricing page, read Oct 15, 2026

From $49/mo

pricing page

The companyeach fact with its source · read Oct 15, 2026
Your datawhat they publish, each line with its page · read Oct 15, 2026

These are TheirStack's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 15, 2026
  • MCP servercom.theirstack/theirstackverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-15
  • Address to connectapi.theirstack.com/mcp
  • API docstheirstack.com/en/docs/api-referencethe vendor's page ↗
  • MCP docstheirstack.com/en/job-posting-mcpthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Most used in HRby use, among tools still maintained — this tool shares no tags yet

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is TheirStack?

    Tracks job postings and technology usage data to find companies by the software they run and their buying signals. It is listed in the Atlas under HR and made by THEIRSTACK SL.

  • Who is TheirStack for?

    Sales and marketing teams who want to find companies by the technology they use or their hiring signals.

  • How much does TheirStack cost?

    Paid plans start at $49/mo, per TheirStack's pricing page on 2026-10-15.

  • Is TheirStack still maintained?

    Actively maintained: site updated 6 days ago.

  • Who owns TheirStack?

    TheirStack is run by THEIRSTACK SL, per its privacy policy (2026-10-15).

  • How do I cancel TheirStack?

    In its own words (terms of service, 2026-10-15): “You can cancel your account at any time by going to app.theirstack.com/settings/billing.”

  • Does TheirStack give refunds?

    In its own words (terms of service, 2026-10-15): “Termination under this Section shall not entitle the User to any refund of Subscription Fees or other amounts paid and shall not relieve the User of any obligations accrued prior to termination.”

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk