NerdyData
NerdyData searches website source code for technologies and HTML, JavaScript or CSS tags across indexed domains.
About NerdyData
NerdyData is a search engine for website source code. It crawls millions of live domains and indexes technologies, JavaScript libraries, HTML patterns, cookies, HTTP headers, and network requests, rendering pages including JavaScript to detect dynamically injected code.
Users can search by technology name, code snippet, script URL, cookie name, or header, combine terms with AND/OR/NOT logic, and filter by employee count, country, and rank. Results include company info, estimated ad spend, emails, and LinkedIn profiles; free registration unlocks 100 rows per report.
Key features
- Search by technology name, code snippet, script URL, cookie, or header
- Combine technologies with AND, OR, and NOT logic
- Filter results by employee count, country, and rank
- Export to CSV or push to HubSpot
- Diff reports across crawls and webhooks on new matches
- Adoption time-series with category, industry, and geo breakdowns
Best for: Sales teams, marketers, and security researchers who need to find websites by technology stack or code pattern.
Good for
- Renders JavaScript to index dynamically injected scripts and tag managers
- Dataset covers 14.7M+ domains and 1,130+ technologies tracked
- Crawls its own data rather than using reseller data
Watch out for
- Free registration is limited to 100 rows per report
NerdyData at a glance
- Website
- nerdydata.com
- Category
- Development › Developer Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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NerdyData FAQ
What can you search for on NerdyData?
Technology names such as Shopify or Klaviyo, raw code snippets, script URLs, cookie names, or HTTP headers.
How does NerdyData find websites using a technology?
It renders each page including JavaScript and indexes the resulting source code, cookies, headers, and network requests.
Who uses NerdyData?
Sales teams for prospect lists by tech stack, marketers for market sizing and adoption benchmarks, and security researchers for tracking code fingerprints or vulnerable software versions.
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