Companies Using Yahoo ConnectID

I expected Yahoo ConnectID to look like the rest of Visitor Identification: a script a marketing team chooses and pastes into its site. Our October 2026 crawl says otherwise. A domain counts here when a page loads a script from connectid.analytics.yahoo.com, and that gives 5,550 live domains, 9th in the category with 1.68%; 2,082 of the domains we chart match a company. Then I opened the pages. On all 101 where we traced the request, Google Ad Manager's own ad tag injected the file, connectId-gpt.js. Nobody pasted it in.

How it gets onto a page

Yahoo's help centre describes a Google Secure Signals route: a publisher opens Inventory, then Secure Signals, in Ad Manager, enables Yahoo ConnectID and lets Google auto-deploy the collection script. That is the pattern we see. Every one of the 101 script tags carried Google's esp-signal attribute, and the file has a single pixel ID built in, 58813, so the same ID appears on every site. Prebid, the other common route, barely shows: on 15 pages where we could read Prebid's user IDs, none listed ConnectID.

Sales signal: the buyer for anything ConnectID touches is whoever runs the Ad Manager account, usually ad operations or a monetisation partner. The web or marketing team may not know the script is there.

Who flips the switch

Because the setting lives in Ad Manager, one account can turn ConnectID on across many sites. Playwire is the biggest case: 432 publisher sites (7.95% of the live set) run their ads under Playwire's network, and all seven I checked, from typingtest.now to bigissue.com, loaded ConnectID that way. Playwire runs those ads but doesn't own the sites, so we leave them out of every chart on this page. Gannett is next, with Gannett-hosted scripts on 316 domains (5.8% of the live set), but those are its own local papers under its own account, so they stay in as one buyer. Other monetisation partners' scripts sit on smaller groups: Setupad on 171 domains, Ezoic on 152 and AdPushup on 78, and the Setupad and AdPushup sites in our sample ran ads under the partner's network too. One Ad Manager network served Carpenter Media Group's papers in both the US and Canada.

Sales signal: dedupe this list by Ad Manager network before you count accounts. Playwire's 432 sites were one decision made once, and Gannett's papers are one buyer.

Growth that comes in blocks

The chart reads 3,141 domains in August 2026, 4,800 in September and 5,550 in October. Part of that is us: the set of domains we crawl turns over every month as dead sites drop out and new ones come in, and our detection signals widen over time. Part is the product. A toggle in one account can add or remove hundreds of sites in a day, so churn is high too. Since 4 August 2026, 3,251 domains have dropped ConnectID on at least one hostname, and a re-check found 849 of them still loading it elsewhere on the same site.

"Most identity products are chosen site by site. Yahoo ConnectID is chosen account by account, and a single ad partner's switch covers hundreds of domains." - Elif Arslan, CMO and co-founder at TechnologyChecker.io

Sales signal: treat month-to-month changes in this count as account decisions, not a trend line. A drop of several hundred domains usually means one partner changed a setting.

Who the publishers are

The size data is small-site heavy: 43.9% of matched companies with a known size have 1 to 10 employees, and 85.86% have 200 or fewer. Only 56 have more than 1,000 staff. The age data pulls the other way. 25.54% were founded before 1960, the second-largest group after the 2010s (28.5%), because legacy newspapers and broadcasters are here in numbers: the Hindustan Times (1924), Amar Ujala (1948), Brazil's Jovem Pan (1944). Named sites include UOL, The Sun, Quartz, India Today's college rankings, Aaj Tak, Mic and the Australian Football League.

Sales signal: there are two lists inside this one. Old newspaper groups with their own ad teams can be sold to directly. The long tail of small sites is better reached through the partners that monetise them.

News first, and not only in the US

Five media labels, Newspaper Publishing (20.81%), Broadcast Media (10.04%), Book and Periodical Publishing (9.87%), Online Audio and Video Media (6.17%) and Media Production (5.44%), add up to 52.33% of matched companies with an industry. Spectator Sports adds 4.54%. The United States has 917 of the 2,082 matched companies (44.04%), then Brazil (140), India (131) and the United Kingdom (106). Spanish- and Portuguese-language media are a real cluster: TVN and Chilevisión in Chile, Latina and América TV in Peru, El Universal and El Economista in Mexico.

Sales signal: vendors selling to publishers in Latin America and India will find a ready list of news groups already running Ad Manager with Secure Signals. They already buy yield and identity tools.

The identity stack around it

Percentages here are of the 5,004 clean domains, without Playwire's sites. Google's ad tag is on 99.64%, Criteo on 94.68%, ID5 on 90.27%, PubMatic on 77.92% and Intimate Merger on 58.61%. On the pages I opened, Ad Manager injected identity scripts from Criteo, ID5, OpenX, RTB House and Intimate Merger the same way it injected Yahoo's. Consent is mostly Google's too: Funding Choices runs on 56.43% and OneTrust on 11.65%. The table's named rivals barely overlap. FingerprintJS shares 294 domains with ConnectID today, ZoomInfo 17 and Leadfeeder 3.

"Publishers don't pick one identity signal. ID5 is on 90.27% of ConnectID domains, and the same Ad Manager screen switches all of them on." - Elif Arslan, CMO and co-founder at TechnologyChecker.io

Sales signal: an identity vendor competing with Yahoo here is asking for one more toggle, not a replacement. Pitch incremental match rate in Safari and Firefox, and show the ad operations team the revenue per signal.

What it costs

Yahoo publishes no price. Its help centre says ConnectID needs a new contract or an addendum to an existing one, that third-party integrations are sometimes covered by an umbrella contract, and that Next-Gen Audiences in Yahoo DSP switches on within 48 hours of integration. That umbrella clause fits the Playwire pattern in our data.

Sales signal: when a site runs ConnectID under a partner's account, the commercial relationship is the partner's. Talk to the partner.

Key takeaways

1. 5,550 domains in October 2026, 9th in Visitor Identification with 1.68%, but an ad identifier, not a B2B visitor tool.

2. All 101 traced loads came from Google Ad Manager's Secure Signals auto-deployment.

3. Playwire's account covers 432 publisher sites (7.95%), left out of our charts; Gannett's own papers (316) stay in as one buyer.

4. Media labels make up 52.33% of matched companies; 43.9% have ten or fewer staff.

5. Identity signals stack: ID5 on 90.27% and Criteo on 94.68% of ConnectID domains.

How to use this list

Group domains by Ad Manager network and by owner first, then filter by country and industry. Our guide to technology detection methods explains why a script injected by another script still counts as detected. For the full list of 5,550 Yahoo ConnectID domains with company, size and stack data, explore TechnologyChecker.io.