Best Website Technology Detection APIs for Developers (2026)

Why Website Technology Detection APIs Matter

Technographic data — knowing what technologies a website uses — has become essential for sales, marketing, and competitive intelligence. For developers and businesses, programmatic access to website technology data enables:

• Sales Prospecting: Target companies using specific technologies (e.g., find all Shopify stores, WordPress sites, or React apps)
• Competitive Intelligence: Monitor competitor tech stacks and detect when they adopt new tools
• Lead Enrichment: Add technographic data to CRM records for better segmentation and scoring
• Market Research: Analyze technology adoption trends across industries, regions, and company sizes
• Security Auditing: Identify outdated frameworks, vulnerable libraries, and security misconfigurations
• Partnership Development: Find potential integration partners based on complementary tech stacks

1. Netrows

Technographics Data Coverage

• Full Tech Stack Detection: Detect the complete technology stack of any website in a single API call
• Frameworks & Libraries: JavaScript frameworks (React, Vue, Angular), CSS frameworks (Tailwind, Bootstrap), and frontend libraries
• CMS & E-commerce: WordPress, Shopify, Wix, Squarespace, Magento, WooCommerce, and more
• Analytics & Marketing: Google Analytics, Hotjar, Segment, HubSpot, Mixpanel, and tracking pixels
• Hosting & Infrastructure: AWS, Vercel, Netlify, Cloudflare, Google Cloud, Azure, and CDN providers
• JavaScript Libraries: jQuery, Lodash, Moment.js, D3.js, and hundreds of other libraries
• CDNs & Performance: Cloudflare, Fastly, Akamai, CloudFront, and other CDN providers
• 180+ Categories: Comprehensive detection across advertising, payments, security, fonts, tag managers, and more

Pros

• Single endpoint that detects the full tech stack across 180+ categories
• 5 credits per call — predictable, transparent pricing
• Combined with 30+ other data sources (LinkedIn, X, GitHub, etc.) in one API
• Returns structured JSON with technology names, categories, and confidence scores
• Interactive API documentation with OpenAPI spec
• No annual contracts

Cons

• No Python/Node SDK yet (REST API only)
• No historical technology tracking (point-in-time detection only)

Pricing

The technographics endpoint costs 5 credits per call. Subscriptions start at €49/month for 10,000 credits. No hidden fees or per-seat pricing.

2. BuiltWith API

Pros

• Industry leader with the largest technology tracking database
• Historical data showing when technologies were added or removed
• Pre-built lead lists by technology (e.g., "all Shopify stores")
• Detailed technology profiles with spend estimates
• Covers millions of websites globally

Cons

• Expensive — starts at $295/month for basic API access
• Pro and Enterprise plans cost $495-$995+/month
• Complex pricing tiers with different data access levels
• Technology data only — no LinkedIn, social, or other enrichment
• API documentation could be more developer-friendly

3. Wappalyzer API

Pros

• Based on the popular open-source Wappalyzer detection engine
• Good detection accuracy for common technologies
• Bulk lookup capabilities
• Browser extension for manual checks
• Well-documented REST API

Cons

• Starts at $100/month for API access
• Higher tiers ($250-$500+/month) needed for bulk lookups
• Technology data only — no cross-platform enrichment
• Detection limited to what the open-source engine supports
• No historical tracking on lower tiers

4. SimilarTech

Pros

• Strong focus on sales intelligence and lead generation
• Technology adoption and removal alerts
• Market share data for technologies
• CRM integrations (Salesforce, HubSpot)

Cons

• Custom pricing only — not self-serve for developers
• Primarily a sales tool, not a developer API
• Long sales cycle to get access
• Technology data only — no cross-platform enrichment
• Less developer-friendly than alternatives

5. WhatRuns

Pros

• Free browser extension for manual checks
• Simple and easy to use
• Detects common technologies quickly
• No account required for basic use

Cons

• No public API for programmatic access
• Browser extension only — cannot be used in automated pipelines
• Limited detection compared to dedicated APIs
• No bulk lookup capabilities
• Not suitable for data enrichment or lead generation at scale

Pricing Comparison

Which Technology Detection API Should You Choose?

For Multi-Platform Data Pipelines

Recommendation: Netrows — If you need technographic data alongside LinkedIn, X, GitHub, or other platforms, Netrows gives you everything in one API with consistent pricing at 5 credits per call. Detect full tech stacks across 180+ categories without separate subscriptions.

For Historical Technology Tracking

Recommendation: BuiltWith — If you need to track when technologies were added or removed from websites over time, BuiltWith has the deepest historical database. Expect to pay $295+/month for API access.

For Lead Enrichment & Sales

Recommendation: Netrows — Combine technographic detection with LinkedIn company data, employee profiles, and other enrichment sources in a single API. Build complete prospect profiles with tech stack, company size, and decision-maker contacts.

For Quick Manual Checks

Recommendation: WhatRuns or Wappalyzer — For one-off technology checks, free browser extensions from WhatRuns or Wappalyzer are the fastest option. They're not suitable for automated pipelines but work well for manual research.

Frequently Asked Questions