Compare/Head to head

Coresignal vs TheirStack

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

Starting price

Coresignal

$49/mo Free trial

B2B company, employee, and jobs data APIs with official MCP. 7-day trial (2,000 credits); Mini is $49/mo.

Where Coresignal fits

  • Builders wiring company/employee/jobs data into agents
  • Clay and n8n shops
  • Sourcing teams that want APIs, not a UI database
  • Buyers who want a 7-day credit trial

TheirStack

$49/mo

For agency recruiters who win business off hiring signals: TheirStack finds every company posting a given role, and what tech it runs, from career sites, ATSs and job boards. Free with 50 company credits a month; API and MCP from $49/mo.

Where TheirStack fits

  • Agency recruiters building BD lists from companies hiring for the roles they place
  • Desks that want a daily alert when target accounts post new jobs
  • Teams feeding hiring signals into Claude, Clay or their own tools by API, webhook or MCP

At a glance

DetailCoresignalTheirStack
Starting price$49/mo$49/mo
Free tier–No–No
Free trialYesNot on record
MCP server✓Yes✓Yes
Public API✓Yes✓Yes
Listed underEmail finders, Lead generation, SourcingLead generation

Where they pull apart

Coresignal

Stands out: A real data API plus MCP at $49 Mini: this is enrichment infrastructure, not a Chrome overlay.

Watch out: Mini is 2,500 credits. Starter is $199 and Pro $499. Treating $49 as production volume will fail in week two.

Not the right fit for

  • Recruiters who only want a LinkedIn Chrome finder
  • Teams that need a sequencer
  • Buyers who need ZoomInfo-the-UI

TheirStack

Stands out: The depth of its job-posting archive: the vendor lists 225M postings back to 2021 across 195 countries and 352k sources, adds about 305k a day, and keeps closed jobs with the date each role went offline. Saved searches send daily or weekly email alerts or push to a webhook, so a desk hears the day a target company opens a role it places.

Watch out: It gives you the company and the posting, not the person: there are no emails or phone numbers for hiring managers, so you still need an enrichment tool to reach anyone. App credits and API credits are separate pools, and each app export is capped at 200 jobs per company.

Not the right fit for

  • Recruiters who need candidate profiles or contact details
  • Teams that want contacts and hiring signals in a single tool

Pros and cons

Coresignal

  • $49 Mini plus a 7-day credit trial
  • Official MCP and data APIs
  • Clay, Zapier, and n8n named
  • $49 is a tiny credit pack
  • Not a recruiter Chrome extension
  • Not a sequencer

TheirStack

  • Free plan every month with both company and API credits
  • Closed jobs are kept and dated, not just live ones
  • Email alerts and webhooks for new postings
  • API, webhooks and MCP server on every API plan
  • No contact data for hiring managers
  • Separate credit pools for the app and the API
  • App exports capped at 200 jobs per company

What each one costs

Coresignal

$49/mo

7-day free trial (2,000 credits). Mini from $49/mo; Starter $199/mo; Pro $499/mo and higher credit tiers. Confirm current terms on the vendor site.

Checked 7 Sep 2026

TheirStack

$49/mo

Free gives 50 company credits and 200 API credits a month. In the app, company credits are bought in one-time packs from $109 for 1,000 up to $999 for 200,000, and a company you reveal stays open for 90 days. API, webhook and MCP access is a monthly subscription from $49/mo for 1,500 API credits up to $1,500/mo for 1,000,000; one job costs 1 credit and a company, tech-stack or buying-intent lookup costs 3. Unused paid credits roll over for 12 months, and full historical datasets are quoted. Confirm current terms on the vendor site.

Checked 28 Sep 2026

Common questions

Is Coresignal cheaper than TheirStack?
Coresignal starts lower, at $49/mo against $49/mo for TheirStack. That is the entry plan on each side, so the real number depends on seats and the tier you land on.
Can you try Coresignal or TheirStack for free?
Neither carries a free tier on our listing. Coresignal offers a free trial.
Does Coresignal or TheirStack have an MCP server?
Coresignal and TheirStack ship a first party MCP server, so an AI assistant can work the product directly.

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Editorial listings, never paid rankings. Prices checked 7 Sep 2026. Confirm current terms on the vendor site. Spot an error?