Companies Using ZoomInfo

Before comparing ZoomInfo's footprint with anyone else's, be precise about what this page counts. As of our October 2026 crawl, TechnologyChecker.io sees 38,740 domains loading ZoomInfo's website script from ws.zoominfo.com or zi-scripts.com, and we matched 27,686 of them to a company record. ZoomInfo's unified script runs WebSights, FormComplete, Schedule and ZoomInfo Chat from one install. It's a census of companies that put ZoomInfo on their own website. It isn't a list of ZoomInfo's customers, and the gap between the two is the first thing a seller should understand.

1. What the count can and can't tell you

Most of what ZoomInfo sells leaves no trace on the open web. A sales team that logs in, filters a market and exports a list never touches its own website in the process. ZoomInfo's Q2 2026 results report 1,891 customers paying $100,000 or more a year, and no total; our 38,740 is a separate population, the subset that decided identifying anonymous web traffic was worth a tag. Treat it as an exact count of tag users and a floor for everything else.

The chart needs the same care. It reads 7,312 in July 2026, then 29,253 in August and 38,740 in October. That step reflects changes on our side, both the domains we cover and the signals we detect ZoomInfo with, rather than a surge in adoption. We started recognizing the zi-scripts.com host on 4 August 2026, 77.8% of today's active domains were first detected that month, and the set of domains we crawl turns over every month as dead sites drop out and new ones arrive. Since tracking began on 16 March 2026, 8,104 domains have dropped the tag, about a fifth of today's base.

"A jump from 7,312 to 29,253 in a month is a measurement story. The selling story is the 8,104 sites that removed the tag." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales Signal: Don't pitch this as a fast-growing market. Pitch timing: a site that adds or removes the ZoomInfo script is a company changing how it handles inbound demand, and that's when vendors in this space get a meeting.

2. Who installs it

The tag base is mid-market. Of the 27,332 matched companies with a known headcount, 35.77% employ 11 to 50 people and 25.86% employ 51 to 200. Micro-businesses are 21.35%, and only 1,295 companies (4.74%) have more than 1,000 staff. They're established too: only 9.71% were founded in the 2020s, while 37.04% predate 2000.

The named accounts fit that picture of B2B firms with sales teams to feed. Emerson, SABIC, Ryder, SAS, Lonza and Tata Communications all loaded the script when we opened their pages, and so did staffing firms Kelly Services and Insight Global. A run of outsourcing and IT services companies sits in the named list too: Nagarro, eClerx, Ibex, VXI and Movate. Of the 44 listed pages that opened for us, 36 ran the script.

Sales Signal: The core buyer is an 11-to-200-person B2B company with a sales team and no research function. They need named accounts delivered, not dashboards to interpret.

3. Industry and geographic concentration

Software Development (11.71%) and IT Services (8.95%) together account for 20.66% of matched companies. Advertising (3.92%), Staffing and Recruiting (3.83%), Financial Services (3.53%) and Business Consulting (3.14%) follow. What these share is deal shape rather than sector: long sales cycles where one company is worth pursuing by name. Consumer retail barely appears, because naming the company behind a visit is useless when the visitor is a shopper.

Geography is narrow. 21,368 of the 27,686 matched companies (77.18%) are in the United States, and with the United Kingdom (1,716) and Canada (1,680) the three hold 89.45%. Germany has 161 and France 118.

Sales Signal: In continental Europe ZoomInfo's tag is thin on the ground. Vendors with stronger European data have room there, and for a ZoomInfo seller the UK and Canada are the only sizeable markets outside the US.

4. Overlap, not migration

No switching corridor involving ZoomInfo passes our test, so there's no migration table on this page. Visitor identification tools stack. Of the domains ever seen running ZoomInfo and Demandbase, 1,162 of 2,025 still run both; for 6sense it's 2,270 of 3,388, and for Leadfeeder 1,969 of 2,385. Movement happens in both directions: since March, 268 domains dropped ZoomInfo and now run Demandbase while 175 dropped Demandbase and now run ZoomInfo, and 240 dropped ZoomInfo for 6sense against 356 going the other way. ZoomInfo also travels with sales-engagement tools: its tag appears on 36.61% of the 1,666 sites in our list of companies that use Salesloft, per the Salesloft profile.

"Most of these companies aren't choosing between ZoomInfo and a rival. They're running both and deciding which to keep." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales Signal: The overlap lists are the opportunity. A domain running ZoomInfo beside 6sense or Demandbase is paying twice for related signals, which makes it a consolidation conversation for either side.

5. Technology ecosystem

Across the 38,521 live ZoomInfo domains in our stack analysis, Google Tag Manager runs on 91.96%. The script is pasted into a container by marketing, with no engineering release in the way, which is also why it comes and goes quickly. HubSpot is beside it on 40.26%, roughly four times Salesforce CRM's 10.29%, and Salesforce Marketing Cloud Account Engagement appears on 10.84%, Marketo on 5.99% and 6sense on 5.89%. HubSpot Chat runs on 10.34% and Zendesk on 4.58%.

That HubSpot weighting tells you who these buyers are. The typical tag user runs inbound marketing on HubSpot and wants the anonymous traffic named before a rep follows up.

Sales Signal: HubSpot integrations matter more than Salesforce ones for selling into this list. A tool that pushes identified accounts into HubSpot workflows speaks to four in ten of these sites.

6. G2 review signals

ZoomInfo's G2 reviews, in the panel on this page, split in a way our data helps explain. Reviewers praise contact breadth (353 mentions), ease of use (349) and accuracy (324). Yet the top five complaints are all about records going bad: inaccurate records (205), stale data (203), contacts who have moved on (186), wrong locations and numbers (161) and outdated emails and titles (155). That's 910 mentions of decay. A website tag doesn't decay the same way, because it reports current visits, which may be part of why mid-sized teams install it alongside the database.

Sales Signal: Data freshness is the soft spot. Competitors selling verified or refreshed contact data should lead with it, and ZoomInfo sellers should lead with the first-party visit data the tag produces.

7. Key takeaways

1. What it measures: 38,740 websites with ZoomInfo's script, a subset of ZoomInfo's customers, not the whole.
2. Position: 3rd in Visitor Identification at 11.71%, level with Leadfeeder; the two rows above are fingerprinting and IP lookup tools.
3. Archetype: a US B2B company of 11 to 200 staff running HubSpot and Google Tag Manager.
4. Chart: the August 2026 step is our detection widening plus crawl turnover, not adoption.
5. Risk: heavy overlap with 6sense, Demandbase and Leadfeeder, and 8,104 removals since March.

8. Sales applications

Outreach angle: "Your site runs ZoomInfo's script and HubSpot. We can show you which identified accounts never reach a HubSpot workflow." That fits the 40.26% of the base running HubSpot.

Targeting strategy: Filter this list to the United States, 11 to 200 employees, and Software Development or IT Services. That's the densest segment on the page.

Competitive angle: Pull the domains running ZoomInfo with 6sense or Demandbase. They already pay for overlapping signals, so a consolidation pitch has a budget line to point at.

Everything here comes from TechnologyChecker.io's October 2026 crawl: 38,740 domains running ZoomInfo's script and 27,686 matched companies.