Amplitude
Amplitude is a web and mobile analytics solution with cross-platform user journey tracking, user behavior analysis and segmentation capabilities.
What detecting Amplitude tells you about a site
Amplitude is a product-analytics platform aimed at understanding user behaviour and funnels, not page traffic. It loads as a client script from Amplitude's CDN and exposes a global (window.amplitude) that fires event payloads to its ingestion endpoint. Catching it on a site is a tell about the team's culture: Amplitude is a product-management and growth tool, so its presence usually means there is a PM org running cohort analysis, retention curves and feature experiments rather than just marketing-attribution dashboards. It skews toward SaaS, fintech and consumer apps that treat their UI as a measurable product surface.
Amplitude in a real-world stack
When you find Amplitude, it rarely travels alone. Commonly alongside a feature-flag/experimentation tool and a CDP, and often duplicated with a marketing analytics tag for separate audiences.
About
Amplitude is a web and mobile analytics solution with cross-platform user journey tracking, user behavior analysis and segmentation capabilities.
Categories: Analytics
Quick facts
Detection methodology for Analytics
Analytics SDKs are usually loaded from a vendor-controlled CDN (`googletagmanager.com`, `google-analytics.com`, `cdn.segment.com`, `cdn.amplitude.com`, `eu.i.posthog.com`) and expose a global with a recognisable surface. We catch the script src URL plus the global plus — when a sourcemap is available — the exact `node_modules/<sdk>/package.json` version. Tracker isolation prevents these vendor libraries from polluting the surrounding stack readings.
How we detect Amplitude
Sourcemap Explorer carries 4 fingerprint signals for Amplitude, spread across 2 channels — javascript global and script src url. The exact patterns are listed below, and you can replay each one in Chrome DevTools to confirm a match by hand.
Each signal alone is rarely conclusive — Sourcemap Explorer cross-references all of them and weights by confidence. You can reproduce any of these checks yourself in Chrome DevTools.
Window-level global the technology installs on page. Reproducible by typing the path into the DevTools console.
window.AMPLITUDE_KEY
window.__AMPLITUDE__
window.amplitudeClient
Script URL pattern. Typically a CDN host or chunk path that ships with the technology.
cdn\.(?:segment.+)?amplitude(?:\.com|-plugins)
FAQ
How do I check if a website is using Amplitude?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. Amplitude's specific fingerprints here are javascript global and script src url, and the popup flags Amplitude whenever any combination of them is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Amplitude version can Sourcemap Explorer detect?
Amplitude ships as a hosted analytics rather than a bundled npm package, so version-specific detection isn't always possible. Where the platform leaks a version in response headers (`X-Powered-By`, `Server`, generator meta tags) we surface it; otherwise we report presence only.
Is Amplitude a SaaS or self-hosted?
Amplitude is offered as a hosted SaaS product. Detection runs against the JavaScript SDK or asset-URL fingerprints the platform ships into pages.
How much does Amplitude cost?
Amplitude's pricing model is documented as: freemium, poa, recurring. Detection is independent of the pricing tier — Sourcemap Explorer flags the technology by its fingerprints, regardless of which paid plan a site is on. See the official site for the current pricing page.
Where can I read more about Amplitude?
Official site: https://amplitude.com. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Keep reading on Sourcemap Explorer
Practical guides
Alternative tools
Detected by Sourcemap Explorer
Open the popup on any page running Amplitudeand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.