TheirStack vs Coresignal: job data for market research or a large historical jobs dataset
TheirStack is a job postings data API (with company and technographic data) aimed at sales and market intelligence as well as job search. Coresignal is a B2B jobs data API and dataset of deduplicated job postings merged from many sources into one format.
The short answer
- TheirStack: Bulk, filterable job-posting data for market research and sales signals, with history back to 2021.
- Coresignal: Large-scale, historical job-postings data for analytics, research and data products.
Side by side
| TheirStack | Coresignal | |
|---|---|---|
| Searches | Aggregated postings from career pages, job boards and ATS platforms across about 363k websites in 195 countries, since 2021. | Company websites, professional networks, ATS platforms and major job aggregators; 486M+ postings, 52M+ active, 195+ countries. |
| Returns | JSON jobs with title, description, url, final_url, source_url, company and company_object, location fields, min/max salary (plus annual USD) and salary_string. | Records with job_id, status, title, description, seniority, employment_type, company_name, company_domain, location, country/city, salary (min, max, currency), external_url and job_sources[].url. |
| Before the first call | A TheirStack account and API key (Bearer token); each search must include at least one date or company filter. | A Coresignal account and API key (trial available); queries use Elasticsearch DSL. |
| Free | 200 API credits and 50 company credits every month, free (1 credit per job returned); free tier rate limit 4/second, 10/minute, 50/hour, 400/day. | Trial with 2,000 free credits, no credit card required (1 credit per job posting record). |
| Paid | From $49 per month for 1,500 API credits (1 credit per job). | Self-serve plans from $49 per month (Mini, 2,500 credits per month); datasets are custom-priced from $1,000. |
| Acting on a result | url, plus final_url with the original career-page URL when available (filterable with final_url_exists). | external_url is the job URL on the company's own site (not always filled); job_sources[].url gives each source posting. |
| Coverage | 195 countries. | 195+ countries. |
| MCP server | Official TheirStack MCP server (search_jobs tool), OAuth or API key; uses the same API credits: https://theirstack.com/en/docs/mcp | Official Coresignal MCP server, OAuth 2.1: https://mcp.coresignal.com/mcp/v2 (legacy https://mcp.coresignal.com/mcp deprecated Nov 1, 2026) |
Where Openpath fits
If the agent needs a job to apply for in Austin, Texas, or a remote one, Openpath returns the listings themselves, free and with no key. See Openpath vs TheirStack and Openpath vs Coresignal.
Questions people ask
What do I need before I can use TheirStack?
A TheirStack account and API key (Bearer token); each search must include at least one date or company filter.
Is TheirStack free?
200 API credits and 50 company credits every month, free (1 credit per job returned); free tier rate limit 4/second, 10/minute, 50/hour, 400/day.
What do I need before I can use Coresignal?
A Coresignal account and API key (trial available); queries use Elasticsearch DSL.
Is Coresignal free?
Trial with 2,000 free credits, no credit card required (1 credit per job posting record).
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
TheirStack, read on October 15, 2026:
- theirstack.com/en/job-posting-api: “253M of jobs across 195 countries since 2021”
- theirstack.com/en/job-posting-api: “career pages, job boards, and ATS platforms”
- theirstack.com/en/docs/pricing/plans: “Start exploring with 50 company credits and 200 API credits every month - completely free, forever.”
- theirstack.com/en/docs/api-reference/rate-limit: “4/second, 10/minute, 50/hour, 400/day”
- theirstack.com/en/pricing: “1,500 API credits — $49 per month”
- theirstack.com/en/docs/api-reference/jobs/search_jobs_v1: “1 API credit for each job returned in the response”
- theirstack.com/en/job-posting-mcp: “Your AI assistant calls the search_jobs tool to find jobs by title, location, salary”
Coresignal, read on October 15, 2026:
- coresignal.com/solutions/jobs-data-api: “Jobs data from company websites, professional networks, ATS platforms, and major jobs data aggregators”
- coresignal.com/solutions/jobs-data-api: “2,000 free credits · No credit card required”
- coresignal.com/solutions/jobs-data-api: “195+ countries covered”
- coresignal.com/pricing: “monthly plans starting at $49/month”
- coresignal.com/pricing: “One price, full data record”
- docs.coresignal.com/jobs-api/multi-source-jobs-api/data-dictionary-multi-source-jobs-api: “External (company) job URL”
- docs.coresignal.com/integrations/coresignal-mcp: “OAuth 2.1 sign-in via the Coresignal dashboard”