Technology profiling and lead generation platform with a REST API for detecting technologies used by websites, tracking technology trends, and identifying technology adoption across 491.9 million domains and 115,907 tracked web technologies.
BuiltWith provides a suite of APIs enabling developers, sales teams, and market researchers to query the technology stack of any website, discover leads based on technology usage, track adoption trends, and analyze website interconnections. The platform covers data from 2000 to the present, updated weekly.
- Domain API - Current and historical technology profiles for any domain
- Lists API - Lists of websites using specific technologies
- Trends API - Technology adoption trends over time
- Change API - Technology additions and removals with business context
- Relationships API - Website interconnection data
- Free API - Basic technology counts, no cost
- Ask API - Natural language domain lookups
- Live Feed API - Real-time WebSocket technology detections
- Company to URL API - Resolve company names to domains
- Tags API - Related domains by IP and attributes
- Recommendations API - Technology suggestions based on profiles
- Keywords API - Websites using specific keywords
- Keyword Search API - Search websites by keyword content
- Vector Search API - Semantic technology searches
- Redirects API - Website redirect chain data
- Product API - eCommerce product lookups
- Trust API - Website trustworthiness assessment
- Financial API - SEC and Companies House financial data
- Bulk Domain API - Batch domain processing
- MCP API - Model Context Protocol integration for AI assistants
- Agent Payment API - Autonomous credit management for AI agents
All API endpoints require an API key passed as a KEY query parameter or Authorization: API {key} HTTP header. Keys are obtained by signing up at builtwith.com.
| Plan | Price | API Credits |
|---|---|---|
| Free | $0 | Limited (Free API only) |
| Advanced | $144/year | Individual lookups |
| Basic | $295/month | 2,000 upload credits/month |
| Pro | $495/month | 20,000 upload credits/month |
| Team | $995/month | 1.2M API credits/year |
| Enterprise | Contact | Custom |
Kin Lane - kin@apievangelist.com