Download websites that use Blue Triangle

About Blue Triangle

Performance monitoring becomes a purchase order at the moment somebody can attach a currency figure to a slow page. Until then it is an engineering preference. After that it is a line item with a defender.

Blue Triangle was built for that argument. The product measures how a site behaves for real visitors rather than in a laboratory, then ties those measurements to conversion and order value so a performance problem can be ranked against every other claim on engineering time. Our category for it is RUM, the vendor of record is Blue Triangle Technologies, and our data puts the first year at 2009, which places it in the wave of tooling that arrived once site speed stopped being a purely technical concern.

Measurement of that kind requires code in the page. A JavaScript beacon loads with the visitor, collects timings from the browser and reports them back, which is exactly why a tool of this shape is visible to a crawler at all while the analysis it feeds is not. Blue Triangle Technologies sells it as Proprietary software on a contract rather than a free tier, and the pricing model shapes the population of sites carrying it more than any technical property does.

A detection is therefore a budget signal before it is a technical one. Sites carrying paid monitoring of real user traffic generally have revenue tied directly to page behavior, an ecommerce funnel or a transactional application, plus a team obliged to justify performance work in business language. The same tooling usually brings tag governance with it, because third party scripts added by marketing are a routine cause of the slowdowns being measured, and a platform that can price a delay is well placed to argue about which tag caused it.

As of October 2026 the fingerprint appears on 6 sites. Anyone tempted to read that as market size should resist. Enterprise monitoring is often injected through a tag manager or an edge worker, and a script that arrives after the initial document can be invisible to a crawl that reads the page as served. The count is reliable in one direction only, as a set of sites where the beacon was present in the markup we received.

Competitors, agencies pitching performance and conversion work, and researchers studying how much third party code sits on commercial sites all want the same thing from this entry. A single domain check tells you whether one retailer is measuring itself. The downloadable list gives you the whole set of domains that are, which is what a prospect list, a market estimate or a longitudinal study actually needs.