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EnglishWhat Is BuiltWith Technology Lookup?
Updated
BuiltWith Technology Lookup is a web technology profiler: you enter a domain, and it reports the technologies that site appears to be using — analytics, advertising, hosting, CMS, eCommerce platforms, and more. It is useful when you want a quick technical read on one site, or when you need to filter and export technology signals across many sites for sales, market research, or investment analysis. A free lookup is available, and the site also lists paid plans for advanced features.
What you can find out
The core lookup answers a narrow but practical question: what is this website built with? BuiltWith says it covers 127,626+ internet technologies, spanning categories such as analytics, advertising, hosting, and CMS.
Beyond a single domain, the same data supports:
- Technology trends — usage changes tracked on a weekly basis, with trend data going back to January 1985.
- eCommerce data — over 2,500 eCommerce technologies and 2 billion unique eCommerce products across more than 26 million eCommerce websites, with exportable attributes including spend, revenue, employee count, social media count, industry, location, and rank.
- Lead and market data — lists built from technology signals, spend, and lifecycle events, exportable and pushable into a CRM.
The site illustrates adoption scale with live website counts for well-known tools, for example Shopify (6,722,390 live websites), Klaviyo (679,180), HubSpot (514,911), Zendesk (282,152), and Salesforce (168,201).
Who it is built for
BuiltWith organizes its use cases around four groups:
| Audience | What they use it for |
|---|---|
| Sales teams | Identify companies adopting competitor tools in real time; build high-intent lists from tech signals, spend, and lifecycle events, pushed into CRM |
| AI & engineering teams | Track verified AI adoption — AI agents, MCP servers, llms.txt, AI SDKs, inference APIs, and developer infrastructure — via APIs, MCP tools, and SDKs |
| Investors and analysts | Validate investments using 20+ years of adoption data; spot emerging winners and declining incumbents across 127k+ technologies |
| eCommerce data users | Analyze eCommerce technology and product data at scale with exportable attributes |
How to use it
- Run a lookup. Enter a domain in the lookup field on the homepage. Expected result: a profile of the technologies detected on that site.
- Read the profile by category. Check the categories that matter for your task — for example hosting and CMS for a technical assessment, or analytics and advertising for a competitive read.
- Move from one site to many. If you need a list rather than a single profile, use the list-building and filtering features to select sites by technology signal, then export.
- Push into your workflow. For recurring sales or engineering use, connect through the available API, MCP tools, SDKs, or CRM integrations rather than checking domains manually.
A free lookup is the starting point; advanced features such as list building, exports, and integrations sit behind the plans listed at builtwith.com/plans.
Practical limits to keep in mind
- Detection is inferred from what a site exposes publicly. A technology can be present but not detectable, or detectable but no longer actively used.
- Coverage is broad but not exhaustive; a missing technology in a profile is not proof that the site does not use it.
- Trend and adoption counts describe aggregate usage over time, not a guarantee about any single company's current stack.
- Pricing, seat limits, and export quotas are not specified in the available material — check the plans page before assuming what a given tier includes.
When to use it
Use BuiltWith when your question is "what does this site run on?" or "which sites use technology X?" — for prospecting, competitive research, market sizing, or technical due diligence. If you need a deep security assessment or a guaranteed inventory of a company's internal stack, treat BuiltWith as one signal among several rather than the final answer.