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BuiltWith
BuiltWith
Technology profiler that tells you exactly what stack any website is running, plus the reverse lookup of every site using a given tool.
Free to $295/mo
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About
BuiltWith scans the web and identifies the CMS, frameworks, hosting, analytics, ad networks, payment processors, and JavaScript libraries used by any public site. The free lookup is genuinely useful for one-off competitor checks, and the paid plans unlock the reverse direction: pull lists of every site using a specific technology, watch when a competitor swaps stacks, or filter the results by traffic, geography, and spend. For sales prospecting, competitive intelligence, and partnership research, the data is hard to replicate from any other single source.
Highlights
- Reverse lookup any technology to get a list of every site using it, filterable by traffic and geography
- Track competitor stack changes over time, including additions, removals, and version bumps
- Free per-site lookup is genuinely useful, paid plans scale up for sales and competitive research
- Coverage spans CMS, frameworks, hosting, analytics, ads, payments, and JavaScript libraries