Companies Using StackAdapt

I spend a lot of time on ad-tech lists, and the first question on any of them is who pays. For StackAdapt the answer is clean. A domain counts here when its pages load StackAdapt's pixel from srv.stackadapt.com. Advertisers install that pixel to track conversions and build retargeting audiences, and publishers don't, so every one of the 30,178 live domains in our October 2026 crawl is an advertiser-side install. 18,127 are matched to a company. When I loaded the 50 sites in the table on 11 October, 34 fired the pixel; bot walls and timeouts blocked 10, and most of the other six now redirect away from the host we detected.

One pixel, one buyer? Usually

Each StackAdapt pixel reports an advertiser account ID. On five big-brand sites I checked, CVS Health, Mars's careers site, Lenovo's newsroom, Fiserv and Serco, every ID was different, which is what separate buyers look like. Apartments are the exception. Hyly.AI runs on 2.17% of StackAdapt domains and The Conversion Cloud on 2.13%, and both turn up on apartment and senior-living sites. On 7 of the 7 such property sites that loaded, the StackAdapt tag carried the same account ID. If that sample holds, one advertiser account, most likely an agency or marketing platform working for those properties, sits behind several hundred domains. Car dealers look different: of eight dealer sites on Shift Digital's tag manager, two loaded StackAdapt, each with its own ID. The biggest single owner in our data is Culligan, with 35 dealer domains, and the three Culligan sites that loaded the pixel shared one account.

Sales signal: dedupe a StackAdapt list by buyer as well as by domain. The apartment cluster appears to be one account with hundreds of sites, and pitching each property manager reaches people who never chose StackAdapt.

Growth, and how much of it is ours

The chart reads 23,250 domains in June 2026, 27,104 in July, 27,178 in August, 29,116 in September and 30,178 in October. The June to July step of 3,854 reflects changes on our side, both the domains we cover and the signals we detect StackAdapt with, and the set of domains we crawl turns over every month as dead sites drop out and new ones are added. After July the line kept rising, by 3,074 domains in three months. Exits are high too. 8,905 domains dropped the pixel between 16 March 2026 and October, close to three for every ten live today, and roughly one in nine of them still runs it on another hostname.

"Ad pixels come and go with campaigns, so StackAdapt's exit count looks alarming out of context. What matters is that the line kept rising through it." - Elif Arslan, CMO and Co-founder at TechnologyChecker.io

Sales signal: a domain that dropped the pixel may only be between campaigns. Treat recent leavers as lapsed advertisers worth a call.

Who buys StackAdapt

63.07% of matched companies with a known size have 50 or fewer employees, against 70.84% on The Trade Desk's profile, and StackAdapt has more mid-sized firms, with 18.21% at 51 to 200 staff. There's a real enterprise tail of 1,175 companies above 1,000 staff, and the pixel often sits on one property: Mars's careers site, Lenovo's and Toyota's newsrooms, Purdue's business school. No industry reaches 5.1%; retail leads at 5.02%, and hospitals plus medical practices add up to 7.3%. Age has two humps, the 2010s at 24.89% and pre-1960 at 18.11%, which takes in the University of Pittsburgh (1787), John Deere (1837) and MD Anderson (1944).

Sales signal: at large organisations the StackAdapt buyer is usually a single marketing team, whether recruiting, enrolment or brand. Find the property the pixel sits on and you've found the team that buys media.

A Canadian tilt

The United States has 13,342 matched companies and Canada 1,581, about one Canadian for every eight American. The Trade Desk's profile shows 1,225 to 37,560, about one in 31, on a much bigger base. Australia (1,042), the United Kingdom (835) and New Zealand (229) follow, and no other country reaches 100. StackAdapt has been based in Toronto since 2014, and its home market shows.

Sales signal: measured against US companies, a StackAdapt list is about three and a half times as Canadian as a Trade Desk list. Canadian agencies and martech vendors should start here; outside the English-speaking markets the list is thin.

Run side by side

Many StackAdapt advertisers buy through more than one platform. The Trade Desk runs on 14.4% of StackAdapt domains, and today 2,218 domains also run Simpli.fi, 1,975 AdRoll, 1,803 Amazon Advertising, 1,167 LinkedIn Ads, 960 MNTN and 648 Criteo. We tested each pair for switching and none passed. About 71% of domains ever seen with StackAdapt and The Trade Desk still run both; for AdRoll it's 66% and for Simpli.fi 74%.

"Seven in ten domains that ever ran StackAdapt and The Trade Desk together still run both. Advertisers add DSPs; they rarely trade one for another." - Elif Arslan, CMO and Co-founder at TechnologyChecker.io

Sales signal: pitch StackAdapt into accounts that already run The Trade Desk or AdRoll as an added channel. For rivals, the 14.4% overlap is a shortlist of advertisers already comfortable running more than one DSP.

The stack around the pixel

Across the 30,289 live domains left after removing for-sale pages, Google Tag Manager runs on 98.91% and Google Analytics on 97.52%. The ad tags beside StackAdapt show multi-channel buyers: the Facebook Pixel on 79.41%, DoubleClick Floodlight on 59.02%, the LinkedIn Insight Tag on 38.09%, Microsoft Advertising on 33.69%, TikTok's pixel on 19.51% and Reddit Ads on 14.02%. HubSpot runs on 19.02%, Marketo on 3.34% and 6sense on 2.16%, a B2B lead-generation slice beside the consumer advertisers.

Sales signal: a StackAdapt domain is a tag-managed site with paid media spread across several platforms. Attribution, consent and tag-governance vendors will find buyers here who already manage many ad tags.

The company and the price

StackAdapt was founded in Toronto in 2014 by Ildar Shar, Vitaly Pecherskiy and Yang Han. Summit Partners led a $300 million minority investment in 2022 and says it supported a further $235 million round led by Teachers' Venture Growth in 2025. It also says more than 40,000 brands use StackAdapt. There's no public price list on StackAdapt's site. In June 2026 Adweek reported that StackAdapt had dropped the $50,000 minimum it first set for ChatGPT ads, quoting its chief revenue officer: "We have no minimums."

Sales signal: 40,000 brands against 30,178 pixel domains suggests that many StackAdapt buyers run campaigns without a site pixel, or through an agency's account. On part of this list the agency owns the relationship.

Key takeaways

1. 30,178 live domains, each an advertiser-side install, 26th in Ad Networks with 0.55%.

2. One shared account appears to cover hundreds of apartment and senior-living sites; elsewhere each site we checked had its own ID.

3. Small and mid-sized buyers, 63.07% with 50 or fewer staff, plus an enterprise tail of 1,175 companies above 1,000.

4. Canada is second, with about one company for every eight in the United States.

5. The Trade Desk (14.4%), AdRoll and Simpli.fi run beside StackAdapt; no pair passes our switching tests.

How to use this list

Filter by country and company size, then check clusters such as apartment communities for a shared account before you count buyers. For the full list of 30,178 StackAdapt domains with company, size and stack data, explore TechnologyChecker.io. Our social media advertising statistics cover the Meta, TikTok and LinkedIn pixels that sit beside it.