Website Technology Lookup API - Tech Stack by Domain

Find out what any website is built with, or find every website built with a given technology, and get the company behind each domain in the same row.

What it does

• Two directions, one dataset. Domain mode profiles websites you already care about. Technology mode finds websites using a technology you sell against or integrate with. Both write the same columns, so an account list and a prospect list are comparable.
• Reads the whole stack, not just the obvious layer. Ecommerce platform, CMS, analytics, tag managers, advertising pixels, payment processors, shipping, email marketing, CDN, hosting, frameworks, widgets and thousands more, each with its tag and categories.
• Dates every detection. First detected and last detected on each technology, merged across the subdomains where it appears, so you can see what a site adopted, what it kept, and what it dropped.
• Estimates budget. Average monthly technology spend in US dollars, plus estimated monthly ecommerce sales revenue and unique product count for online stores.
• Names the company. Company name, city, state, postcode, country and vertical, with telephone numbers and social profiles, so a domain becomes an account.
• Ranks the site. Traffic ranks from several sources, employee count and social follower count, which is how a list of a hundred thousand sites becomes a list of the two hundred worth calling.
• Filters a technology list the way a territory is drawn. Country, minimum employees, minimum monthly tech spend, minimum estimated sales, minimum product count, minimum followers and maximum traffic rank, plus a second technology the site must also run.
• Finds recent adopters and recent leavers. Date range filters on both first and last detection, so "sites that added this in the last quarter" and "sites that dropped it" are single runs.
• Pages a list properly. The provider pages by anchor rather than page number, and the run follows it to the end marker instead of guessing when to stop.
• Leaves personal data out unless you ask. Personal names and email addresses are suppressed by default.

Input

Profile a list of domains

{
  "mode": "domains",
  "domains": ["shopify.com", "notion.so", "example.com"],
  "liveOnly": true,
  "includeCompanyMeta": true
}

Find websites using a technology

{
  "mode": "technology",
  "technology": "Shopify",
  "alsoUsing": ["Klaviyo"],
  "countries": ["US", "GB"],
  "minEmployees": 25,
  "minSpend": 500,
  "maxTrafficRank": 500000,
  "maxResults": 1000
}

Find recent adopters of a technology on sites you already track

{
  "mode": "domains",
  "domains": ["example.com", "example.org"],
  "firstDetectedFrom": "2026-01-01"
}

Example output

One row per website.

{
  "domain": "example.com",
  "found": true,
  "technologyCount": 47,
  "technologies": ["Shopify", "Klaviyo", "Google Analytics", "Cloudflare"],
  "technologyDetails": [
    {
      "name": "Shopify",
      "tag": "shop",
      "categories": ["Ecommerce Platform"],
      "isPremium": "yes",
      "firstDetected": "2019-04-02T00:00:00Z",
      "lastDetected": "2026-08-30T00:00:00Z"
    }
  ],
  "categories": ["Ecommerce Platform", "Email Marketing", "Analytics"],
  "monthlyTechSpendUsd": 4364,
  "estimatedMonthlySalesUsd": 298538,
  "companyName": "Example Inc.",
  "city": "San Francisco",
  "state": "CA",
  "country": "US",
  "vertical": "Retail",
  "employees": 240,
  "socialFollowers": 51200,
  "trancoRank": 82311,
  "firstIndexed": "2012-07-29T14:00:00Z",
  "lastIndexed": "2026-08-30T14:00:00Z"
}

Frequently asked questions

How do I find every website using a specific technology?

Set the mode to technology, put the technology name in, and set a row limit. Add filters to keep the list usable: country, minimum employees, minimum technology spend, minimum estimated sales, or a maximum traffic rank. A popular platform has millions of sites behind it, so the row limit and the filters are what decide the size and cost of the run.

Can I find sites using two technologies at once?

Yes. Put the main technology in the technology field and the others in the also using list, up to sixteen. The list then contains only sites running all of them, which is how you target a stack rather than a single tool, for example every store on one ecommerce platform that also runs a particular email tool.

What technologies are detected?

Everything the provider detects from a site's code and headers: ecommerce platforms, content management systems, analytics and tag managers, advertising and tracking pixels, payment and checkout, shipping, email and marketing automation, CDN and hosting, frameworks, JavaScript libraries, widgets, and server and infrastructure signals. Each detection carries a tag, a set of categories, and the dates it was first and last seen.

How do I write the technology name?

Write it as the provider names it. Spaces become dashes, and this actor converts them for you, so both Google Analytics and Google-Analytics work. If a list comes back empty, the usual cause is a name the provider spells differently rather than a site count of zero, because an unrecognised technology name returns no rows rather than an error.

Can I see when a site started or stopped using something?

Yes. Every technology carries a first detected and a last detected date. Where the same technology appears on several subdomains, the dates are merged to the widest window, because the question is whether the company uses it rather than which page shows it. The date range filters then let you ask for recent adopters or for sites where a technology has stopped being detected.

What is monthly technology spend?

An estimate, in US dollars, of what a site spends per month on the paid technologies detected on it. It is a budget proxy rather than an invoice: it is useful for sorting a large list by how much a company invests in its stack, and for filtering out sites running nothing but free tools.

Do I need my own API key?

Yes. This actor is bring your own key: it calls the technology data API using your own account key, so you keep your own credit balance, your own rate limits and your own agreement with the provider. Sign in to the provider and copy the key from its API section.

Why did a run return no rows instead of an error?

If it happens on every row, check the key. This provider answers an unrecognised key with HTTP 200 and an error inside the body rather than with an authentication status, so a dead key looks like an empty result to anything that only reads the status line. This actor inspects the body on every call and ends the run with a clear message instead, so a run that produced nothing will say why.

How much does a run cost?

Charging is per row. A full domain profile carries the whole stack, spend estimates, ranks and company details, and is priced accordingly. A row in a technology list carries one technology and the site's details, and costs less. Domains the provider has no profile for are not charged. Set maxResults to cap the rows a run can produce.

What are the rate limits?

The provider allows ten requests a second with eight running at once. This actor paces itself at 120 requests a minute by default and is capped at 300. Because domain mode sends sixteen domains per request, the request rate is rarely the limit that matters.

Keyword map

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