Download websites that use Marchex

About Marchex

Call analytics is a reminder that not every conversion happens in a browser. A site running Marchex is swapping the phone number a visitor sees so that the resulting call can be tied back to the campaign that produced it, which means the business behind the domain treats a phone call as the sale. Very few technologies tell you that much about how a company actually makes money.

Marchex Inc. has been at this longer than much of the Analytics field, starting in 2003, in the era when paid search was becoming the main acquisition channel and the gap between an online click and an offline sale was the obvious unsolved measurement problem. The platform is Proprietary and sold into industries where the phone still closes the deal, including motor retail, healthcare, real estate and home services, which is why the detected population skews towards a particular kind of business rather than towards the web at large.

As of October 2026 we detect Marchex on 323 sites. Number insertion runs in the browser, so the script is visible to a profiler, but the count still understates real usage. Many deployments load through a tag manager or a first party proxy, some fire only on campaign landing pages that a crawl entering at the homepage never reaches, and a customer using the vendor for inbound routing without web based number swapping leaves no front end trace at all.

The reason a list of these domains is worth having is the qualification it carries. A domain running call tracking has a phone based sales process, an advertising budget large enough to justify measuring it, and a marketing function sophisticated enough to care about attribution. As a filter over the open web, that is an unusually tight description of a buyer. Competing analytics vendors, contact centre and voice platforms, lead generation companies and agencies pitching paid media all want exactly that set, and none of them can construct it from a directory of company names.

A per domain check answers a question you already had. A list answers the ones you could not ask. Which sectors and countries have adopted call attribution at all, how the installed base sits against the wider Analytics field, which advertising and tag management stacks it is paired with, and which domains added or removed the script between two snapshots, which is often the earliest public sign that a marketing contract changed hands. The Analytics dataset includes the domain, the date the detection was last confirmed and the other technologies seen alongside it, so the population can be narrowed by stack and by geography before anyone works the list.