What does TheirStack do?
TheirStack sells job-posting and technographic data to sales and marketing teams. It lets a user find companies by the roles they are hiring for and the technologies they use, then reveal or export those companies for outreach. The product comes as a web app, an API with webhooks, an MCP server and bulk datasets, with integrations for tools such as Clay, Zapier and Make.
The company describes itself as a job posting and technographics database that turns postings into three kinds of signal: hiring signals, meaning a company is recruiting for a given role, technographic signals, meaning its postings name a given technology, and pain point or buying intent signals derived from what the postings describe. A typical workflow is business-to-business prospecting: filter to companies hiring a Snowflake administrator, confirm the rest of their stack, save the search, and send the matching accounts to a CRM or an outreach tool. The app is the main surface for sales users, with saved searches, alerts, team workspaces and exports, while the API and datasets serve teams that want the same data inside their own systems.
JobsPipe sits one layer below that. It is a jobs data API for developers rather than a prospecting app: POST /v1/jobs/search returns normalized postings with filters such as job_title_or, company_name_or, skills_or and posted_at_gte, webhooks push new postings as they appear, and POST /v1/stack/scan detects what a company's domain runs. There is no built-in CRM export or packaged intent score, so the sales workflow is yours to build. In exchange you get explicit source filtering and raw postings suited to recruiting tools, job boards, labour market analytics and AI agents.
If you run outbound and want hiring and technology signals combined in an interface, TheirStack is built for that and its free plan is enough to judge it. If you are building a product on postings data, try the JobsPipe sandbox search endpoint, which needs no key, and compare the JSON with what your product needs. The comparison at jobspipe.dev/alternatives/theirstack covers both.
The full treatment is on Job data vendors and tools.
Related questions
Who is TheirStack for?
Primarily sales development, growth and marketing teams doing business-to-business prospecting, who want lists of companies that are hiring for a role or using a technology. TheirStack's own material also addresses recruiters and developers, and the API, webhooks and datasets exist for teams that want to build the data into their own products. The app, with saved searches and exports, is designed around the salesperson rather than the engineer.
What is technographic data?
Technographic data describes the technologies a company uses, in the way firmographic data describes its size and industry. Vendors gather it either by scanning websites for detectable code or by reading job postings for the tools a company hires around. TheirStack uses the job posting method, which reaches internal systems that a website scan cannot see, at the cost of missing companies that do not mention a tool in their ads.
Does TheirStack provide contact details for people at a company?
Not directly. TheirStack's docs say it does not supply contact data itself and instead connects to third-party contact providers such as Apollo and ContactOut, so emails and phone numbers for decision makers come through those integrations. Some job records do carry hiring manager details where the posting shows them. JobsPipe likewise holds no contact or people data, only public postings and domain scans.
What are the alternatives to TheirStack?
It depends on which part you valued. For broad company, employee and jobs datasets with enterprise delivery, Coresignal is the closest. For a blend of company signals, PredictLeads is nearest. For a developer jobs API with self-serve pricing, the options include Fantastic.jobs and JobsPipe. The roundup at jobspipe.dev/theirstack-alternatives compares seven of them on the rate per thousand jobs.
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