Tech Stack Guides
149 articles
How to Find Out What Technology a Website Is Built With (2026 Guide)
Five reliable ways to identify any website's tech stack — from CMS and JavaScript framework to hosting, CDN and analytics — plus how detection tools actually work and how accurate they are.
How to Tell If a Website Uses Heap
Heap (Heap Analytics) autocaptures product events. Detect it via the cdn.heapanalytics.com script, the global heap object, heapanalytics.com beacons and _hp2 cookies.
How to Tell If a Website Uses Foundation
Foundation (by Zurb) is a responsive front-end framework. Detect it via its grid classes (row/columns, grid-x/cell), data-* component attributes and the foundation.css/js files.
How to Tell If a Website Uses Sezzle
Sezzle is a buy-now-pay-later provider for North American shoppers. Detect it via widget.sezzle.com assets, the global Sezzle object and its 4-payment instalment messaging.
How to Tell If a Website Uses Criteo
Criteo is a leading retargeting and performance-advertising platform. Detect it via the static.criteo.net OneTag, the window.criteo_q array and criteo.com / criteo.net tracking.
How to Tell If a Website Uses Imperva (Incapsula)
Imperva (formerly Incapsula) is an enterprise WAF and CDN. Detect it via the X-Iinfo and X-CDN: Incapsula response headers, incap_ses / visid_incap cookies and _Incapsula_Resource scripts.
How to Tell If a Website Uses Contentsquare
Contentsquare is an enterprise digital-experience analytics platform (formerly ClickTale). Detect it via the t.contentsquare.net/uxa script, the _uxa global and contentsquare.net endpoints.
How to Tell If a Website Is Built With Eleventy (11ty)
Eleventy (11ty) is a flexible, zero-JS-by-default static-site generator. Detect it via the generator meta tag reading 'Eleventy', its pure static HTML output and the absence of a framework runtime.
How to Tell If a Website Uses KeyCDN
KeyCDN is an affordable pull-zone CDN. Detect it via assets served from a *.kxcdn.com pull-zone domain (or a custom CNAME) and the Server: keycdn-engine response header.
How to Tell If a Website Uses Woopra
Woopra is a customer-journey analytics platform. Detect it via the cdn.woopra.com/track.js script, the window.woopra object, *.woopra.com beacons and the wooTracker cookie.
How to Tell If a Website Uses Adobe Analytics
Adobe Analytics (formerly Omniture SiteCatalyst) powers enterprise measurement. Detect it via AppMeasurement.js, the global s object, /b/ss/ beacons to omtrdc.net and AMCV cookies.
How to Tell If a Website Uses FastSpring
FastSpring is a merchant-of-record platform for selling software and SaaS globally. Detect it via the sbl.onfastspring.com store-builder library, the fastspring global and onfastspring.com checkout.
How to Tell If a Website Uses Contact Form 7
Contact Form 7 is the most installed WordPress form plugin. Detect it via the wpcf7 form markup, the /wp-content/plugins/contact-form-7/ assets and the _wpcf7 hidden fields.
How to Tell If a Website Uses Chart.js
Chart.js is the most popular simple charting library. Detect it via the window.Chart global, the chart.js/chart.min.js script and the <canvas> elements it renders charts into.
How to Tell If a Website Uses Feefo
Feefo is an independent, invitation-only reviews platform. Detect it via api.feefo.com widget and badge assets, the feefo-prefixed markup and its verified-reviews structured data.
How to Tell If a Website Uses Kissmetrics
Kissmetrics is a person-based product and marketing analytics tool. Detect it via the _kmq global array, the i.kissmetrics.io / kissmetrics.com scripts and km_ cookies.
How to Tell If a Website Uses Brevo (formerly Sendinblue)
Brevo (formerly Sendinblue) offers email, SMS, chat and automation. Detect it via sibforms.com form embeds, the sibautomation.com tracking script and the Sendinblue/sib globals.
How to Tell If a Website Uses Braintree
Braintree (a PayPal company) powers card and PayPal payments for many businesses. Detect it via js.braintreegateway.com scripts, the braintree global, hosted-fields iframes and braintreegateway.com APIs.
How to Tell If a Website Uses Sanity
Sanity is a developer-first headless CMS. Detect it via cdn.sanity.io image URLs, apicdn.sanity.io API calls and the project ID and dataset embedded in those URLs.
How to Tell If a Website Uses Bugsnag
Bugsnag (SmartBear) is an error-monitoring and stability platform. Detect it via the @bugsnag/js SDK, the window.Bugsnag object, the API key in Bugsnag.start() and notify.bugsnag.com beacons.
How to Tell If a Website Uses Crisp
Crisp is a developer-friendly, affordable live-chat and messaging tool. Detect it via the client.crisp.chat/l.js script, the window.$crisp object and the CRISP_WEBSITE_ID value.
How to Tell If a Website Uses Wordfence
Wordfence is the most popular WordPress security plugin. Detect it via /wp-content/plugins/wordfence/ assets, wfwaf and wordfence cookies, and its branded block pages.
How to Tell If a Website Uses Bunny Fonts
Bunny Fonts is a privacy-first, GDPR-friendly drop-in replacement for Google Fonts. Detect it via fonts.bunny.net stylesheet links and font-file requests.
How to Tell If a Website Uses LogRocket
LogRocket combines session replay with front-end error and performance monitoring. Detect it via the cdn.logrocket.io script, the window.LogRocket object, LogRocket.init() and lr-ingest beacons.