How to Find Companies Using a Specific Technology (2026)

Disclosure: We make AgentData, so the first method below is ours. Every AgentData count in this guide is quoted exactly as its customer list showed it on 29 October 2026, and every price for another tool comes from that tool’s own page, read the same day.

Customer lists you can open now

If the product you sell against is one of these, the list already exists. Each count is the number of companies where we found the product on the company’s website or in its DNS records. Hits seen only inside a shared Google Tag Manager container, which can belong to a website builder rather than the company, are left out of the Intercom count. The last column is the new customers we detected in the 30 days before 29 October 2026.

Customer list	Companies	New, last 30 days
Companies using ShopifyOnline stores	942,962	63
Companies using HubSpotCRM and marketing	314,721	296
Companies using MailchimpEmail marketing	263,367	86
Companies using KlaviyoEmail and SMS marketing	221,786	133
Companies using StripePayments	159,277	35
Companies using AtlassianTeam software (Atlassian Cloud)	106,594	50
Companies using ZendeskHelp desk	89,033	95
Companies using WebflowWebsite builder	75,067	13
Companies using SalesforceCRM	57,026	12
Companies using IntercomCustomer messaging	20,307	12

Read from each customer list on 29 October 2026 at 10:13 UTC. The live pages update as our crawl finds new evidence, so they may differ by the time you read this. Every other technology we detect has a page in the technology directory.

What one row tells you: Zendesk, 29 October 2026

A name on a list is only useful if you know why it is there. These are the first five rows of the list of companies using Zendesk as anyone could see them on 29 October 2026, with no account.

• SPF record means the company’s domain lists Zendesk among the services allowed to send its email. A company sets that up itself, so it is strong evidence that its support team sends mail through Zendesk.
• Script or signature means we found the product’s own code or a pattern unique to it on the company’s website, such as a help widget.
• First seen is when we first found the product on that company, not when the company bought it.

Unite Students is the kind of row worth a second look: our record shows Zendesk seen on a single crawl, 29 September, by one of our own website checks, at medium confidence, rather than a setting the company made itself. It may be right, but it is less proven than Passport’s email setting, first seen in April and still there on 29 September. The full list shows the evidence for every row, so you can keep the strongest.

See every row, filter by sector and country, and download the list. 7 days, no card.Start the 7-day trial →

Five ways to find companies using a technology, compared

Here are the five methods that work in 2026, with what each costs and what it misses. Prices were read on 29 October 2026.

Method	What you get	Cost	What it misses
A customer list: AgentData (ours)	Every company where the product shows on its website or in its DNS records, with the evidence, the first-seen date and new customers each week	First 25 companies of any list with no account. $99 a month for 10 technologies, 7-day trial, no card	Products used only behind a login, such as a CRM the sales team uses but never connects to the website or email
A technology lookup tool	Lists of websites using a technology, from tools such as BuiltWith and Wappalyzer	BuiltWith Basic $295 a month for 2 technologies; Wappalyzer Pro $250 a month for 2 lead list technology targets	Tools used only behind a login, as with any outside check. Lists for more than two technologies take BuiltWith Pro ($495 a month) or Wappalyzer Business ($450 a month)
Job posts	Companies whose job ads name the product, by hand or through a job-post tool such as TheirStack	Your time by hand; TheirStack sells 1,000 company credits for $109, one credit for each company revealed	Companies that haven’t posted a job naming the tool
Case studies and review sites	Customers the vendor names on its site, and reviewers on sites such as G2	Your time	Most customers: vendors name a small share of their customers, chosen by them, and some stories are years old
Checking a site yourself	Proof for one company at a time	A few minutes a company	Scale: fine for ten accounts, not for ten thousand

Scroll sideways for more columns. Prices from each vendor’s own pricing page, read on 29 October 2026 (sources at the end). AgentData prices from our pricing page.

On AgentData, Pro covers 10 technologies for $99 a month, and Business covers as many as you need for $299 a month. Our side-by-side comparisons with other technographics tools go into price, evidence and new-customer data in more detail.

How to build the list in five steps

1. Name the product. Usually it is the one your buyers use today instead of yours. If yours plugs into another tool (an app for Shopify stores, an add-on for HubSpot), it is that tool.
2. Open its customer list. Start from the customer lists, or search the technology directory for any of the other products we detect.
3. Keep the strong evidence. A script the site loads or a DNS record the company set up is strong. A single sighting is worth a two-minute check (next section) before a call.
4. Narrow it to your market. Filter by sector and country. Look at the new customers we detected in the last 30 days: a company that just added a product yours plugs into is worth a call now.
5. Take it into your tools. Download a CSV for your CRM or sequencer. Pro includes 100,000 records a month and a weekly email of new customers; the 7-day trial includes 1,000 records.

One record is one company, and downloading it again later doesn’t count twice. Companies that join a list after you added it don’t count against your allowance.

Check a company yourself before you call

You should be able to confirm any row on a list in a couple of minutes. The first row of our list of companies using HubSpot on 29 October 2026 was AllVoices, detected by a script. We opened allvoices.co in Chrome and looked:

On https://www.allvoices.co/ (opened in Chrome, 10:15 UTC)

scripts loaded:   js-na2.hsforms.net/forms/embed/v2.js
requests made:    forms-na2.hsforms.com/embed/v3/form/244253756/...
typeof window._hsq  ->  "object"

Two of these are the signs the HubSpot list page names as its evidence: a script from HubSpot’s form servers (hsforms.net) and HubSpot’s tracking queue, window._hsq. To do the same for any site:

1. Look at what the site loads. Open the site, press F12 (Cmd+Option+I on a Mac, or right-click and choose Inspect), go to the Network tab, reload, and search for the product’s name or its script host. Accept the cookie banner first: many tools only load after consent.
2. Look at its mail settings. Run nslookup -type=TXT example.com (or use any online DNS lookup) and read the line starting v=spf1. Each include: names a service allowed to send the company’s email, such as mail.zendesk.com for Zendesk.
3. Be wary of tag managers. A tool that appears only inside a Google Tag Manager container may belong to the website builder or agency, not the company. That is why our Intercom count leaves those hits out.

Job posts, case studies and lookup tools

Job posts

Search job boards for the product name plus a role: “Zendesk administrator”, “HubSpot operations”. A company hiring for a tool almost certainly runs it, and job posts catch internal tools a website never shows, such as a data warehouse. TheirStack builds its technology data this way; its documentation says it infers technology use from job postings, so a company that has never posted a job naming the tool won’t appear under it.

Case studies, logo walls and review sites

Vendors name their happiest customers on their own site, and review sites show the company behind many reviews. Both are reliable for the names they give, but they give few names, and a case study from 2019 says nothing about 2026.

Technology lookup tools

BuiltWith says on its plans page that it is free for single-site lookups, and a free Wappalyzer account gets 50 technology lookups every month. Both are good for checking one company. For lists, both start at two technologies: BuiltWith Basic at $295 a month and Wappalyzer Pro at $250 a month (read on 29 October 2026). Bloomberry starts at $199 a month for data on 2 vendors.

Other public traces

• Customer web addresses. Some tools give each customer its own address, such as yourcompany.zendesk.com for a help centre. Try the company’s name in the tool’s address pattern.
• Other DNS lines. Besides SPF, TXT records carry verification lines (Atlassian, Google and many others ask for one), and MX records name the company’s email host, such as Google Workspace or Microsoft 365.
• Applicant tracking sites. Search job boards hosted by Greenhouse, Lever or Ashby for the product’s name to find job posts that never reach the big boards.
• App marketplaces and partner directories. Companies that build on a product list their apps in its marketplace, and agencies list themselves as partners.

We don’t show screenshots of other tools’ lists: BuiltWith’s and Wappalyzer’s lists need paid plans, and TheirStack’s public HubSpot page shows only its first 10 companies.

Why providers give different counts for the same product

Ask four sources how many companies use HubSpot and you get four answers. All were read on 29 October 2026:

Source	HubSpot count	What it counts
AgentData (ours)	314,721	Companies with HubSpot on their website or in their DNS records, each with evidence
TheirStack	218,442	Companies whose job posts mention HubSpot
Bloomberry	123,648	Companies using HubSpot; the page notes that it tracks Marketing Hub
HubSpot’s own report	306,446	Customers at 30 June 2026, as HubSpot reports them

Scroll sideways for more columns. Each figure as shown on the source’s page on 29 October 2026; links at the end.

The numbers measure different things. HubSpot counts its own customers. We count websites and domains where HubSpot is set up, which can include users of HubSpot’s free tools, and misses customers who never connect HubSpot to their site or email. A job-post count only sees companies that have posted jobs naming the product. A closer number is not proof of a complete list, so the useful question for any source is the one above: what does it count, and can you see the evidence for each company?

curl -s "https://agentdata.run/api/v1/tech/zendesk?page=1"

{
  "technology": "Zendesk",
  "companies": [
    { "domain": "23m.com", "company_name": "23M",
      "sector": "Developer Tools & Infrastructure", "b2b_b2c": "b2b", ... },
    { "domain": "itsacheckmate.com", "company_name": "Checkmate",
      "sector": "Marketing & Sales Tech", "b2b_b2c": "b2b", ... },
    (trimmed: 18 more rows on this page; some fields left out)
  ],
  "total": 89033,
  "company_count": 89033,
  "listed_count": 13505,
  "page": 1,
  "per_page": 20,
  "lookups_consumed": 0
}

Response headers (no key sent):
x-plan: anonymous
x-companies-limit: 50

claude mcp add --transport http agentdata https://mcp.agentdata.run/mcp

lookup_company({ "domain": "passportglobal.com" })
technologies[]: 25 found; the Zendesk entry (category left out, timestamps trimmed to dates):

{
  "name": "Zendesk",
  "detection_method": "dns_spf",
  "confidence": "high",
  "first_seen": "2026-04-09",
  "last_seen": "2026-09-29"
}

usage: requests 296 of 300 left this 5h window · companies 28 of 50 left today

What a list can’t tell you

The catch: A list built from outside a company can’t see tools used only behind a login, so no outside list holds every customer. A first-seen date is when we first found the product, not when the company bought it. A company with several websites can appear more than once. A script or DNS entry can stay in place after a company no longer uses a product, so check when each company was last seen. And “new customers” are companies where we found the product for the first time in the last 30 days: a first sighting can also be a long-time user we have only just found.

What a list can do is give you thousands of companies with a reason for each one, in minutes, and tell you each week which ones are new.