Category
Signals
Rating
4.9/5 (15 Reviews)
Availability
HQ
A Coruna, Spain
Pricing
From $59/mo
Free tier
Yes
Best for
Also in
Capabilities
What is TheirStack?
TheirStack is a hiring-and-technographic signals tool for staffing and recruiting agencies. It reads public job postings across major global boards (190M+ historical postings per TheirStack) plus the technologies a company runs (32,000+ tracked), so you can find companies that are actively hiring or that use the tools you place around, and it automatically excludes other recruiting firms from results. For an agency running outbound, that is a filtered list of companies to pitch - reaching a decision-maker while the hiring need is live, rather than after the role is everywhere.
What are TheirStack's key features?
Tracks job postings and hiring activity so you can spot companies that are hiring.
Technographic data showing which tools a company runs.
Company, job and technographic data only, with no emails or phone numbers.
Developer API and a vendor-hosted MCP server at api.theirstack.com/mcp.
Credits bill per record returned: 1 per job, 3 per company.
How do staffing agencies use TheirStack?
- Spot client companies hiring for roles you place, then work them as BD targets.
- Feed new postings into Make or Clay so BD outreach fires on a fresh signal.
- Qualify a company before you pitch by checking which tools it already runs.
Who is TheirStack best for?
- Agency BD teams that work companies already hiring, not cold prospect lists.
- Agencies with someone who can wire an API into Clay or Make, or pay for the app plan.
- Not a fit on its own if you need contacts; it carries no emails or phones.
What are TheirStack's pros and cons?
Pros
- Surfaces hiring companies early from public job-posting signals, so you pitch before the role is everywhere.
- Technographic filtering across 32,000+ technologies adds targeting beyond firmographics (per TheirStack).
- Automatically excludes recruiting and consulting firms, so the list is genuine hiring companies.
- API, webhooks, and an official MCP server route signals into Clay, a CRM, or a sequencer.
Cons
- Runs on public job-posting and tech signals, so it is weaker for companies with little public hiring activity.
- It is a signals layer, not a full outbound platform - you still need your own CRM or sequencer, and often a separate step for verified decision-maker contact data.
- Not certified GDPR-compliant, which matters when processing data on EU-based contacts.
What are people saying about TheirStack?
TheirStack holds a 4.8/5 rating on G2, though from a small early review base. Reviewers praise the coverage and stability of its job-posting and technographic data and the quality of its API; the main limitation noted is that signals depend on public hiring data.
Consolidated from 15 reviews across G2 · Updated May 29, 2026
Frequently asked questions about TheirStack
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