Web Intelligence Platform

Everything you need to
understand any website

Klazify combines website classification, traffic analytics, company intelligence, and technology detection into one platform. Explore on the web or integrate via our REST API.

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620+
IAB v3 Categories
150+
Technologies Detected
10
REST API Endpoints
100K+
Companies Trust Klazify

Website Classification

Classify any URL into
620+ IAB v3 categories

Submit any URL, domain, or email address and get back a structured classification with confidence scores. Klazify uses AI models combined with real-time web scraping to understand a site's content, metadata, and structure.

  • IAB Content Taxonomy v3 — the global ad-tech standard
  • Confidence scores for each category assignment
  • Multi-category support: primary + secondary classifications
  • Works with any URL, domain, or email address
  • Real-time classification on demand via API
API Response — /categorize
{
  "domain": {
    "categories": [
      {
        "name": "/Technology & Computing/Software",
        "confidence": 0.97,
        "IAB3": "IAB-632"
      },
      {
        "name": "/Business & Finance/Enterprise",
        "confidence": 0.89,
        "IAB3": "IAB-107"
      }
    ]
  }
}
Traffic Intelligence
Monthly Visits52.4M
Global Rank#847
Bounce Rate34.2%
Avg. Visit Duration6m 42s
Pages per Visit4.8
Top Sources: Search 59.2% · Direct 31.3% · Referrals 6.5%

Traffic Analytics

Traffic data for
any website

Get detailed traffic intelligence including monthly visit estimates (in millions), global and country-specific rankings, engagement metrics, traffic source breakdown, and top countries. Understand how any website performs.

  • Monthly visits in absolute numbers (millions)
  • Global rank, country rank, and category rank
  • Engagement: bounce rate, visit duration, pages/visit
  • Traffic sources: search, direct, referral, social, paid, mail
  • Top countries by traffic share
  • Historical monthly visit trends

Company Intelligence

Company data behind
any domain

Discover the company behind any website. Get firmographic data including company name, headquarters location, employee count ranges, estimated revenue, founding year, and industry tags. Essential for lead enrichment and market research.

  • Company name and legal entity
  • Headquarters: city, state, and country
  • Employee count ranges (1-10 to 100K+)
  • Estimated annual revenue brackets
  • Industry tags and business descriptions
  • Social media profiles (LinkedIn, Twitter, Facebook)
Company Profile — apple.com
A
Apple Inc.
Cupertino, CA, US
Employees
100K+
Revenue
$10B+
Industry
Consumer Electronics
Founded
1976
Tags
Technology Hardware Software Consumer Electronics Mobile Cloud
Tech Stack — stripe.com
CMS Ruby on Rails
Analytics Google Analytics, Segment, Amplitude
CDN Cloudflare, Fastly
JavaScript React, TypeScript, Webpack
Payment Stripe (internal)
Hosting AWS, Google Cloud
A/B Testing Optimizely
Chat Intercom

Technology Detection

See the tech stack
behind any site

Our crawler inspects HTML, JavaScript, HTTP headers, and network signatures to fingerprint 150+ technologies. Identify CMS platforms, analytics tools, CDNs, frameworks, ad networks, payment processors, and more.

  • 150+ technologies across all major categories
  • CMS, analytics, CDN, frameworks, ad networks
  • Payment processors and e-commerce platforms
  • Real-time detection with refresh parameter
  • Bulk detection via CSV enrichment

More Capabilities

And much more

Logo API

Get any company's up-to-date logo in multiple sizes. One API call, instant results for any domain.

Similar Domains

Find competitors and alternatives for any website. Discover who operates in the same space and category.

Social Media

Extract verified social media links — LinkedIn, Twitter, Facebook, Instagram, YouTube — from any domain.

CSV Batch Enrichment

Upload a CSV of domains and get them enriched with categories, company data, tech stacks, and traffic. Export results.

Domain Explorer

Browse millions of domains by category, technology, company size, country, and revenue. Filter, sort, and export.

Real-time Refresh

Force a fresh crawl for any domain with the refresh parameter. Get the latest data, not cached results.

REST API

Built for developers.
Loved by data teams.

10 endpoints, clean JSON responses, comprehensive documentation. Start integrating web intelligence into your product in minutes.

POST /categorize

Categorize

Classify any URL into 620+ IAB v3 categories with confidence scores.

POST /company

Company

Get firmographic data: name, HQ, employees, revenue, tags.

POST /technology

Tech Stack

Detect 150+ technologies: CMS, analytics, CDN, frameworks.

POST /traffic

Traffic Intelligence

Monthly visits, ranks, engagement, sources, top countries.

POST /logo

Logo

Company logos in multiple sizes. Instant, always up to date.

POST /domain_iab_categories

IAB Categories

Full IAB v3 taxonomy mapping with IDs and confidence.

POST /similar

Similar Domains

Find competitors and alternatives operating in the same space.

POST /social_media

Social Media

Verified social profiles: LinkedIn, Twitter, Facebook, more.

POST /domain_info

Domain Info

WHOIS data, domain age, expiration, and registration details.

Full API Documentation Get API Key

Developer Experience

Quick to integrate.
Easy to scale.

Simple RESTful architecture. POST a URL, get JSON back. Works with any language. Python SDK available on PyPI.

Simple Auth: Bearer token in header. Get your key in seconds after signing up.
Clean JSON: Predictable response structure across all endpoints.
Rate Limits: 360 requests/minute default. Custom limits available for enterprise.
Batch CSV: Upload thousands of domains and get enriched results back.
Live Refresh: Force a fresh crawl with refresh=true on paid plans.
curl example 
# Classify a domain
curl -X POST https://www.klazify.com/api/categorize \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://stripe.com"}'

# Get company data
curl -X POST https://www.klazify.com/api/company \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"url": "https://stripe.com"}'

# Get traffic analytics
curl -X POST https://www.klazify.com/api/traffic \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"url": "https://stripe.com"}'

Start building with Klazify.

100 free lookups per day. The Starter plan includes a 7-day free trial.

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