TechLookup.app - 2026 Pricing, Features, Reviews & Alternatives

TechLookup.app is a web-based technology intelligence tool that identifies the full tech stack of any website, covering CMS and e-commerce platforms, frontend frameworks, JavaScript libraries, analytics and marketing tools, hosting providers, CDNs, and security technologies. Users can enter a domain to retrieve a complete tech stack report, or run a reverse search to find all indexed websites running a specific technology such as Shopify, WordPress, or React. The platform indexes over 1,033,189 websites and supports detection of 7,626 technologies, with no installation required for the core web tool. A Chrome extension is also available for inspecting any site's stack directly while browsing.

Detection relies on real-browser crawling, which loads pages in a full browser environment to capture client-side frameworks and dynamically loaded scripts, combined with fingerprint-based matching across HTTP headers, scripts, cookies, markup, and DNS records against a public fingerprint database. Where exposed by the target site, version information is surfaced alongside first-seen and most-recently-seen dates per technology. Indexed sites are re-crawled approximately monthly, and any on-demand lookup triggers a fresh scan if the cached result is older than seven days, keeping data current for active research workflows.

TechLookup.app serves sales and business development professionals researching prospect tech stacks before outreach, developers and agencies auditing website technology, and digital marketing teams tracking technology adoption. A free tier requires no account and supports three lookups per day, making it accessible for individual researchers and casual use. Paid plans starting at $19 per month unlock filtered technology lists, bulk website lists by technology, contact details, and CSV export, addressing the needs of teams running prospecting or competitive intelligence workflows at scale.