The StackOptic Blog
Practical guides on identifying website technologies, SEO and GEO, web performance and lead generation — from the team behind StackOptic.
How to Tell If a Website Uses Razorpay
Razorpay is India's leading payment gateway. Detect it via the checkout.razorpay.com/v1/checkout.js script, the global Razorpay constructor and api.razorpay.com requests.
How to Tell If a Website Uses jsDelivr
jsDelivr is a free public CDN for open-source packages. Detect it via assets loaded from cdn.jsdelivr.net (/npm/, /gh/, /wp/ paths) in script, link and image tags.
How to Tell If a Website Uses Ant Design
Ant Design is a comprehensive React UI library for enterprise apps. Detect it via ant- prefixed class names (ant-btn, ant-row, ant-table) and its design-token CSS variables in the DOM.
How to Tell If a Website Uses Lucky Orange
Lucky Orange combines heatmaps, session recordings and live chat. Detect it via the tools.luckyorange.com/core/lo.js script, the __lo_site_id global and __lotl / _lo_uid cookies.
How to Tell If a Website Uses Taboola
Taboola is a leading native-advertising and content-recommendation network. Detect it via the cdn.taboola.com/libtrc loader, the _taboola global array and 'Sponsored'/'Around the Web' widgets.
How to Tell If a Website Uses comScore
comScore (Scorecard Research) measures audience for advertising. Detect it via the scorecardresearch.com beacon, the _comscore array and the COMSCORE / beacon.js signals.
How to Tell If a Website Uses Amplitude
Amplitude is a leading product-analytics platform. Detect it through the cdn.amplitude.com script, the global amplitude object, api2.amplitude.com beacons and amp_ cookies.
How to Tell If a Website Uses Adobe Fonts (Typekit)
Adobe Fonts (formerly Typekit) is a premium web-font service. Detect it via use.typekit.net kit scripts/CSS, the wf-loading / wf-active classes and p.typekit.net tracking.
How to Tell If a Website Uses New Relic
New Relic Browser monitors front-end performance and errors. Detect it via the NREUM global, the inline browser-agent snippet, the nr-data.net beacons and the js-agent.newrelic.com script.
How to Tell If a Website Uses ActiveCampaign
ActiveCampaign blends email marketing, automation and CRM. Detect it via *.activehosted.com forms, the trackcmp.net site-tracking beacon and the vgo() tracking function.
How to Tell If a Website Uses Square
Square powers payments for many small and omnichannel businesses. Detect it via the web.squarecdn.com / js.squareup.com scripts, the Square global and squareup.com checkout flows.
How to Tell If a Website Uses Okendo
Okendo is a customer-marketing and reviews platform for Shopify DTC brands. Detect it via okendo.io assets, oke-prefixed review markup and its structured-data review output.
How to Tell If a Website Is Built With SvelteKit
SvelteKit is the official application framework for Svelte. Detect it via /_app/ asset paths, data-sveltekit-* link attributes and the __sveltekit_ hydration global.
How to Tell If a Website Uses Sucuri
Sucuri is a website security platform and WAF. Detect it via the Server: Sucuri/Cloudproxy header, X-Sucuri-ID and X-Sucuri-Cache response headers, and Sucuri firewall block pages.
How to Tell If a Website Is Built With Ghost
Ghost is a modern publishing and membership platform. Detect it via the Ghost generator meta tag, /content/images/ paths, the Portal membership script and /members/ and /ghost/ routes.
How to Tell If a Website Uses Three.js
Three.js is the leading WebGL 3D library. Detect it via the window.THREE global, the three.min.js script and a WebGL <canvas> rendering interactive 3D.
How to Tell If a Website Is Built With OpenCart
OpenCart is a lightweight open-source ecommerce platform. Detect it via route= URLs, the catalog/view/theme/ path, /image/cache/ images and the 'Powered By OpenCart' footer.
How to Tell If a Website Uses Fathom Analytics
Fathom is a privacy-first, cookieless analytics tool. Detect it via the cdn.usefathom.com/script.js library, the data-site attribute, the window.fathom object and its cookieless beacons.
How to Tell If a Website Uses D3.js
D3.js is the leading data-visualisation library. Detect it via the window.d3 global, the d3.min.js script and the data-bound SVG it generates for charts and visualisations.
How to Tell If a Website Uses imgix
imgix is a real-time image-processing CDN. Detect it via *.imgix.net asset URLs and its query-string transformation parameters like auto=format, fit, w and dpr.
How to Tell If a Website Uses Chakra UI
Chakra UI is a popular accessible React component library. Detect it via chakra- prefixed class names, --chakra- CSS custom properties and Emotion css-<hash> classes in the DOM.
How to Tell If a Website Uses Afterpay (Clearpay)
Afterpay (Clearpay in the UK) is a major BNPL provider. Detect it via static.afterpay.com assets, the <afterpay-placement> widget, the AfterPay messaging and afterpay.com checkout.
How to Tell If a Website Is Built With Remix
Remix is a full-stack React framework focused on web fundamentals. Detect it via the window.__remixContext, __remixManifest and __remixRouteModules globals embedded in the page.
How to Tell If a Website Uses PayPal
PayPal is one of the most widely accepted payment methods online. Detect it via the paypal.com/sdk/js script, paypalobjects.com assets, the paypal global and Smart Payment Buttons.