Companies Using Marker.io

Marker.io looks like BugHerd's smaller twin, and on cleaned counts it is. But a third of the snippets we could check pointed at a project that was archived, deleted or unpaid, and one platform was in there too. A domain counts here when its pages create Marker.io's configuration object or load its script from edge.marker.io, and the project behind it isn't known to be dead. Our October 2026 crawl finds 3,989 live domains on that basis, 2,734 matched to a company, 5th of 49 in Help Desk. On the cleaned set, 2,108 of 2,830 homepages we could read had the snippet in the page source.

One platform out of the count

Typeform uses Marker.io on its own marketing site. Our crawl stores Typeform workspace addresses as separate domains, and those addresses, plus custom form domains that don't point at a form, fall back to Typeform's marketing pages. All of them loaded Typeform's project: 271 domains, 5.17% of the raw count, belonging to one customer. Typeform's project refuses to open on those addresses anyway, so the widget did nothing there. They're out.

Marker.io puts a project ID in its configuration. On the cleaned set we read it on 1,893 domains: 1,324 projects, 81.3% of them on a single domain. The multi-domain projects are brands with many addresses. A Canadian clinic chain runs one project on 43 clinic domains, a Dutch building supplier one on 27, a children's hospital foundation one on 26 and a family of UK charities one on 21.

Sales signal: dedupe by project before you count accounts. Most rows are one team with one site.

Is the project still alive?

Every time the widget loads, it asks Marker.io for its project, and the answer says whether the project works. We asked for every project we read on the raw set, 2,877 non-Typeform domains. 984 (34.2%) were dead: 13.24% archived, 13% projects Marker.io no longer has and 7.96% blocked for an inactive subscription. We removed them. Of the 1,893 readable domains left, 1,673 point at a live project: 1,043 show the widget to logged-in team members only, 438 keep it hidden until called and 192 show a feedback button to everyone. Another 182 refuse the address they sit on, usually because the project was verified for a different domain, and the other 38 gave no clear answer.

"A third of the Marker.io snippets we could check pointed at a project that was archived, unpaid or gone. Teams close the project when the site launches and leave the code in the template." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales signal: archived and unpaid projects belong to former customers who still have the code in their template. For Marker.io's rivals, those 984 domains are a list of warm leads.

Exits we can see

Dead projects are the quiet churn. The visible kind is a site removing the code: 898 domains dropped Marker.io since we began tracking it in March 2026, and 84 of those still run it on another hostname, so the real figure is a little lower. Because this page now uses one cleaned reading, there is no trend line yet; the next monthly crawl will be the first like-for-like comparison, with the usual caveat that the set of domains we crawl turns over and our detection widens.

Sales signal: a site that removed the code has made a decision; a site with a dead project hasn't. Prioritise the second group for win-back or displacement.

Who the customers are

41.28% of matched companies have 1 to 10 employees and 30.71% have 11 to 50. The age profile is younger than BugHerd's: 16.08% were founded in the 2020s, against 9.28%. Large organisations appear through single sites: Aston University's online campus, a Stanford research portal, ABC Fitness. Marker.io's own case studies feature L'Oréal, which it says runs Marker.io across 100+ websites, and 360VIER, which it says manages 250+ sites. Its about page claims 3,000+ customers and a nine-person team.

Sales signal: the buyer is a web or QA lead at a small software company or agency. Developer-facing pitches land better here than client-feedback ones.

Industry and geography

Medical Practices lead at 4.42%, partly that clinic chain's domains, then Software Development (3.94%) and Hospitality (3.86%). No industry reaches 5%. The United States has 1,354 companies, the United Kingdom 301 and Canada 241. Europe is stronger than on BugHerd: six continental countries hold 381 companies, 15.13% of the country table against 7.12% of BugHerd's, led by the Netherlands (149).

Sales signal: Benelux web agencies are better covered by a Marker.io list than a BugHerd one.

No switching to report

No migration pair passes our tests. 152 Marker.io domains run Zendesk today, out of 194 ever seen with both; 14 run Noibu and 3 Birdie. Only 21 domains load both Marker.io and BugHerd.

"Marker.io and BugHerd share almost no sites, so the choice is made once per team. Win the agency or the QA lead and you get every site they touch." - Elif Arslan, CMO & Co-founder at TechnologyChecker.io

Sales signal: displacement happens at the team, not the domain. Target the agencies behind multi-domain projects first.

The stack around it

WordPress runs on 43.23% of the cleaned domains and Webflow on 11.1%, more than twice its 4.49% on BugHerd's. Sentry is on 10.58% and Datadog on 2.33%. CookieYes (9.3%), OneTrust (7.84%), Cookie Control (7.24%) and Cookiebot (6.89%) point to European and enterprise sites, and Zendesk (3.13%) leads the support tools.

Sales signal: Webflow agencies and B2B software teams are the two clearest segments in this stack.

What it costs

Marker.io's pricing page (15 October 2026) lists Starter at $39 a month billed yearly for 3 users, Team at $149 for 15 users with Jira, issue sync and session replay, and a custom Business plan. Agencies can apply for a $99-a-month Agency plan. Reporters are free and unlimited, and the trial runs 15 days.

Sales signal: a three-user Starter plan is cheap to keep and easy to forget, which fits the many archived projects we found.

Key takeaways

1. 3,989 live domains after cleaning, 5th in Help Desk, but a feedback widget, not a help desk.

2. 984 dead projects and 271 Typeform pages are out of the count.

3. Of 1,893 readable domains left, 1,673 open normally, most visible only to the team, and 182 more sit on a live project that refuses the address.

4. Younger and more European than BugHerd's base, with more developer tooling around it.

How to use this list

Dedupe by project, then filter by country and size. For the full list of 3,989 Marker.io domains with company, size and stack data, explore TechnologyChecker.io.