Compare/Head to head

BuiltWith vs TheirStack

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

Starting price

BuiltWith

$295/mo

For agency recruiters who place talent for one platform, such as Salesforce, HubSpot or Shopify: BuiltWith lists every company whose website runs that technology, so your client prospect list is built from the stack. Free single-site lookups; lead lists from $295/mo.

Where BuiltWith fits

  • Agency recruiters specialising in Salesforce, HubSpot, Shopify, Magento or similar platforms
  • BD teams that want alerts when target companies adopt or drop a technology
  • Researchers mapping which companies use a competitor's product

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

DetailBuiltWithTheirStack
Starting price$295/mo$49/mo
Free tier–No–No
MCP server✓Yes✓Yes
Public API✓Yes✓Yes
Listed underLead generationLead generation

Where they pull apart

BuiltWith

Stands out: The size and history of its web index: it tracks 127,670 technologies with usage history going back years, and can alert you when a list of sites starts or stops using one. A recruiter placing Salesforce admins can pull every company that added Salesforce last quarter, filtered by location and revenue, as a live BD list.

Watch out: It only sees what a company runs on its public website, so back-office systems that leave no trace on the site are missed, and it says nothing about who is hiring. At $295/mo for two technologies it is expensive for a solo desk, and the API and MCP server are charged on top in credits.

Not the right fit for

  • Recruiters who need hiring signals or contact details first
  • Solo recruiters on a tight budget
  • Teams whose target tech is internal, not visible on a website

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

BuiltWith

  • Very large technology index with long history
  • Alerts when companies adopt or drop a technology
  • Native CRM enrichment for Salesforce, HubSpot, Dynamics and Zoho
  • Hosted first-party MCP server
  • Only sees technology visible on a public website
  • No hiring signals
  • Starts at $295/mo, with the API billed separately

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

BuiltWith

$295/mo

Single-site technology lookups are free on builtwith.com. Paid plans for lead lists are Basic at $295/mo (2 technologies and 2 keywords), Pro at $495/mo (unlimited technologies and keywords) and Team at $995/mo; yearly billing costs ten times the monthly price. The minimum term is one month, cancelling keeps access to the end of the term, and plan changes are refunded pro rata. The API and MCP server are paid for separately in API credits. Confirm current terms on the vendor site.

Checked 28 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 BuiltWith cheaper than TheirStack?
TheirStack starts lower, at $49/mo against $295/mo for BuiltWith. That is the entry plan on each side, so the real number depends on seats and the tier you land on.
Can you try BuiltWith or TheirStack for free?
Neither carries a free tier on our listing.
Does BuiltWith or TheirStack have an MCP server?
BuiltWith 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 28 Sep 2026. Confirm current terms on the vendor site. Spot an error?