Website technology checker
See what a website is built with — and the evidence behind each detection, so you can judge it yourself.
- Detections from documented signatures
- The evidence for each technology
- Free: 20 checks a day, no account
Give it something to look up — Glee will do the digging.
How the website technology checker works
The tools a company's website runs on say a lot about the company: whether it sells online, which marketing and analytics stack it pays for, how big its web team is likely to be. For sales and partnership research, technology is often the field that turns a list of names into a list of prospects.
This checker loads the site's home page once, the way a browser would, and matches what it sees — response headers, script and stylesheet addresses, generator tags, cookies — against documented signatures. Each detection is shown with the piece of evidence that triggered it, so a surprising result can be checked rather than trusted.
Run it on the address people actually visit. A redirect to another domain is followed and reported, because a company's marketing site and its shop are often built differently.
What each field means
- Technology
- A product or framework whose signature was found.
- Evidence
- The header, script or tag that matched.
Where this check stops
- Coverage is limited to documented signatures; a missed signature means unknown, not absent.
- Only the page fetched is examined: tools used elsewhere on the site, or loaded after a click, are not seen.
The same check, through the API
Same calculation, same answer, with a key. 5 credits per check ($0.50 per 1,000). A free account includes 1,000 credits a month.
GET /v1/tech/acme.com Host: gleanzy.com Authorization: Bearer $GLEANZY_KEY
Frequently asked
Does it log in or crawl the whole site?
No. One public page is fetched, with a short timeout and a size cap.
Why is a tool I know they use missing?
It may load only on some pages or only after consent, or have no documented signature yet. Missing means not detected.