Builtwith

BuiltWith (builtwith.com) is a web technology profiling service that analyzes any website and reveals the complete technology stack used to build it — including web frameworks, CMS platforms, analytics scripts, CDN services, advertising networks, payment processors, email marketing tools, and dozens of other technology categories.

For OSINT investigators, technology stack intelligence from BuiltWith provides multiple investigative insights. Knowing exactly what technology a website is built with reveals vendor relationships, technical capabilities, and operational infrastructure details that are not otherwise disclosed.

Tracking ID attribution is BuiltWith's most powerful investigative capability. The platform stores the complete history of technology installations for websites — including analytics tracking IDs, advertising pixel IDs, and other unique identifiers embedded in site code. When two websites share the same Google Analytics ID, Facebook Pixel, or other unique tracking identifier, they are almost certainly operated by the same entity. BuiltWith's search allows investigators to find all websites that share a specific tracking ID, revealing operator networks.

Historical technology data shows what technologies a website has used over time — when they adopted specific tools, when they changed platforms, and when they added or removed specific services. This temporal data creates an operational timeline for the website.

For fraud investigation, technology analysis reveals inconsistencies between a website's claimed sophistication and its actual technical implementation — a supposedly professional financial service built on a basic template with cheap hosting is a red flag.

CMS and framework identification (WordPress, Shopify, Magento) reveals specific vulnerability surfaces relevant to authorized security assessments.

BuiltWith's reverse technology lookup allows searching for all websites using a specific technology — useful for mapping all sites built by the same developer (if the developer uses consistent tools) or all sites in a specific market segment.

Document the websites analyzed, technology stacks identified, tracking IDs found, and any cross-site connections established through shared identifiers.