Find every website
using any technology.
Search millions of live domains by the technologies, scripts, and HTML they use. Build prospect lists, watch competitors, or size a market — in seconds.
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match every technology
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14,720,877
total domains
Used by teams at
Popular intel
Reports the community runs daily.
Why teams use it
One dataset, three jobs.
Sales
Prospect by tech stack
Build target lists of companies running the exact technologies your product replaces — or complements.
Competitive
Watch competitor adoption
Get notified when a domain swaps your tech for a rival's, or vice versa. Quantify churn risk before it lands.
Research
Size any market
Count adoption across categories, geographies, and verticals. Back your slide with a number that's defensible.
About NerdyData
The search engine for source-code and technographics.
NerdyData is a search engine for website source code. It crawls millions of live domains and lets you find every website using a specific technology, JavaScript library, HTML pattern, cookie, or HTTP header.
You can search by technology name (e.g. "Shopify", "Klaviyo"), raw code snippets, script URLs, cookie names, or HTTP headers. Results include company info, estimated ad spend, emails, and LinkedIn profiles for each matching domain.
Sales teams use it to build prospect lists by tech stack. Marketers use it to size markets and benchmark adoption. Security researchers use it to track websites using specific code fingerprints or vulnerable versions of software.
NerdyData runs a proprietary crawler that fully renders each page — including JavaScript — and indexes the resulting source code, cookies, headers, and network requests. This means it can detect client-side scripts, tag managers, and dynamically injected code that standard crawlers miss.
Browse by category
Every category. Every vendor.
AI-native access
Use NerdyData in your AI assistant.
Ask Claude, Cursor, or ChatGPT to find leads, look up domain tech stacks, and export lists — all in natural language.
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Start analyzing technology adoption today
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