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TheirStack

Analytics & Data
B2B sales intelligence platform that analyzes 172M+ job postings across 11M companies to surface hiring signals, technographic data, and buying intent.
TheirStack mines 172M+ job postings across 318K job boards and 11M companies to surface hiring intent, technographic data (32K+ technologies), and buying intent keywords in job descriptions. GTM teams use it to identify companies actively looking for solutions and build targeted prospect lists.
Best for
B2B sales teams discovering high-intent prospects through job posting and hiring signals
job-signalstechnographicsbuying-intentlead-discovery
Last updated: February 27, 2026
24/50
Overall Score
API Quality
8/10
GTM Relevance
16/20
PricingFreemium
Complexityeasy
Learninglow
Visit theirstack.com →

API Analysis

REST API
✓
Available
Webhooks
✓
Available
GraphQL
—
—
OAuth
—
—
SDKs:typescriptRate Limits:Credit-based with plan limitsWebhook Reliability:goodDocs:https://api.theirstack.com/
hubspotsalesforcepipedriveapollomakezapierclay

Pricing

freemiumFree Tier
Free tier with 50 credits/mo, paid plans from EUR 90/mo

Strengths & Weaknesses

Strengths
Massive job posting database provides unique buying intent signals
Well-documented REST API with OpenAPI specs and TypeScript SDK
Generous free tier with 50 credits/mo to test before committing
Weaknesses
Job posting signals are inherently lagging behind actual buying decisions
Technographic accuracy depends on public job posting mentions

Alternatives

BuiltWithCompareWappalyzerOcean.ioSalesIntel

Reviews

G2 Reviews →Trustpilot →Capterra →
Homepage →Pricing →API Docs →Docs →

FAQ

What is TheirStack?

TheirStack mines 172M+ job postings across 318K job boards and 11M companies to surface hiring intent, technographic data (32K+ technologies), and buying intent keywords in job descriptions. GTM teams use it to identify companies actively looking for solutions and build targeted prospect lists.

Is TheirStack free?

Yes, TheirStack offers a free tier. Free tier with 50 credits/mo, paid plans from EUR 90/mo

What are TheirStack alternatives?

Popular alternatives to TheirStack include BuiltWith, Wappalyzer, Ocean.io, SalesIntel. Compare features, API quality, and pricing on GTM Tools.

Does TheirStack have an API?

Yes, TheirStack provides a REST API. API quality is rated EXCELLENT. Documentation: https://api.theirstack.com/.

Who is TheirStack best for?

B2B sales teams discovering high-intent prospects through job posting and hiring signals