Segment
Segment is a customer data platform (CDP) that helps you collect, clean, and control your customer data.
What detecting Segment tells you about a site
Segment (Twilio Segment) is a customer-data platform whose job is to collect events once and fan them out to many downstream tools. It is detected from its SDK: the analytics.js snippet loaded from cdn.segment.com (analytics.min.js), a window.analytics global exposing track/identify/page, and the ajs_user_id / ajs_anonymous_id cookies it sets. Spotting Segment tells you a data-mature organisation that centralised its event pipeline — a strong hint that several analytics, marketing and warehouse tools sit behind it rather than each loading its own script.
Segment in a real-world stack
When you find Segment, it rarely travels alone. Acts as a hub feeding Google Analytics, Mixpanel/Amplitude, marketing tools and a data warehouse, often alongside a SPA framework.
About
Segment is a customer data platform (CDP) that helps you collect, clean, and control your customer data.
Categories: Customer data platform
Quick facts
How we detect Segment
Sourcemap Explorer carries 5 fingerprint signals for Segment, 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.__SEGMENT_INSPECTOR__
window.analytics.SNIPPET_VERSION = (.+)
window.analytics.VERSION = (.+)
Script URL pattern. Typically a CDN host or chunk path that ships with the technology.
cdn\.segment\.com/analytics\.js
/segment-wrapper\.min\.js
FAQ
How do I check if a website is using Segment?
Open the page in Chrome, click the Sourcemap Explorer toolbar icon, and read the Stack tab. Segment's specific fingerprints here are javascript global and script src url, and the popup flags Segment whenever any combination of them is found. The same checks can be reproduced manually in DevTools — see the "How we detect" section above.
What Segment version can Sourcemap Explorer detect?
Segment ships as a hosted customer data platform 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 Segment a SaaS or self-hosted?
Segment 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 Segment cost?
Segment's pricing model is documented as: mid, freemium, 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 Segment?
Official site: https://segment.com. For Sourcemap Explorer's detection guide, see the deep-dive link below or the related guides in the cross-link section.
Detected by Sourcemap Explorer
Open the popup on any page running Segmentand you'll see the exact version pulled from the bundled package.json when sourcemaps are exposed.