diff --git a/.gitignore b/.gitignore
index f562212..6db848c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,4 @@ Gemfile.lock
 /.env
 /tmp
 /cache
-node_modules
+node_modules
\ No newline at end of file
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 6c5ca21..4509efd 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2020-11-13 00:44:58 UTC using RuboCop version 1.3.0.
+# on 2020-11-13 02:59:59 UTC using RuboCop version 1.3.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -52,7 +52,7 @@ RSpec/EmptyExampleGroup:
   Exclude:
     - 'spec/checks/site_inspector_endpoint_accessibility_spec.rb'
 
-# Offense count: 23
+# Offense count: 24
 # Configuration parameters: Max.
 RSpec/ExampleLength:
   Exclude:
@@ -60,12 +60,13 @@ RSpec/ExampleLength:
     - 'spec/checks/site_inspector_endpoint_hsts_spec.rb'
     - 'spec/checks/site_inspector_endpoint_https_spec.rb'
     - 'spec/checks/site_inspector_endpoint_sniffer_spec.rb'
+    - 'spec/checks/site_inspector_endpoint_wappalyzer_spec.rb'
     - 'spec/site_inspector_disk_cache_spec.rb'
     - 'spec/site_inspector_domain_spec.rb'
     - 'spec/site_inspector_endpoint_spec.rb'
     - 'spec/site_inspector_spec.rb'
 
-# Offense count: 14
+# Offense count: 15
 # Configuration parameters: Include, CustomTransform, IgnoreMethods, SpecSuffixOnly.
 # Include: **/*_spec*rb*, **/spec/**/*
 RSpec/FilePath:
@@ -79,6 +80,7 @@ RSpec/FilePath:
     - 'spec/checks/site_inspector_endpoint_hsts_spec.rb'
     - 'spec/checks/site_inspector_endpoint_https_spec.rb'
     - 'spec/checks/site_inspector_endpoint_sniffer_spec.rb'
+    - 'spec/checks/site_inspector_endpoint_wappalyzer_spec.rb'
     - 'spec/checks/site_inspector_endpoint_whois_spec.rb'
     - 'spec/site_inspector_cache_spec.rb'
     - 'spec/site_inspector_disk_cache_spec.rb'
@@ -89,7 +91,7 @@ RSpec/FilePath:
 RSpec/MultipleExpectations:
   Max: 5
 
-# Offense count: 238
+# Offense count: 240
 # Configuration parameters: IgnoreSharedExamples.
 RSpec/NamedSubject:
   Exclude:
@@ -102,6 +104,7 @@ RSpec/NamedSubject:
     - 'spec/checks/site_inspector_endpoint_hsts_spec.rb'
     - 'spec/checks/site_inspector_endpoint_https_spec.rb'
     - 'spec/checks/site_inspector_endpoint_sniffer_spec.rb'
+    - 'spec/checks/site_inspector_endpoint_wappalyzer_spec.rb'
     - 'spec/checks/site_inspector_endpoint_whois_spec.rb'
     - 'spec/site_inspector_cache_spec.rb'
     - 'spec/site_inspector_disk_cache_spec.rb'
diff --git a/lib/site-inspector.rb b/lib/site-inspector.rb
index 7da97e2..4634a38 100644
--- a/lib/site-inspector.rb
+++ b/lib/site-inspector.rb
@@ -9,6 +9,7 @@
 require 'whois'
 require 'cgi'
 require 'resolv'
+require 'dotenv/load'
 
 require_relative 'site-inspector/cache'
 require_relative 'site-inspector/disk_cache'
@@ -24,6 +25,7 @@
 require_relative 'site-inspector/checks/sniffer'
 require_relative 'site-inspector/checks/cookies'
 require_relative 'site-inspector/checks/whois'
+require_relative 'site-inspector/checks/wappalyzer'
 require_relative 'site-inspector/endpoint'
 require_relative 'site-inspector/version'
 require_relative 'cliver/dependency_ext'
diff --git a/lib/site-inspector/checks/wappalyzer.rb b/lib/site-inspector/checks/wappalyzer.rb
new file mode 100644
index 0000000..395aeab
--- /dev/null
+++ b/lib/site-inspector/checks/wappalyzer.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+class SiteInspector
+  class Endpoint
+    class Wappalyzer < Check
+      ENDPOINT = 'https://api.wappalyzer.com/lookup/v2/'
+
+      def to_h
+        return {} unless data['technologies']
+
+        @to_h ||= begin
+          technologies = {}
+          data['technologies'].each do |t|
+            category = t['categories'].first
+            category = category ? category['name'] : 'Other'
+            technologies[category] ||= []
+            technologies[category].push t['name']
+          end
+
+          technologies
+        end
+      end
+
+      private
+
+      def request
+        @request ||= begin
+          options = SiteInspector.typhoeus_defaults
+          headers = options[:headers].merge({ "x-api-key": api_key })
+          options = options.merge(method: :get, headers: headers)
+          Typhoeus::Request.new(url, options)
+        end
+      end
+
+      def data
+        return {} unless api_key && api_key != ''
+
+        @data ||= begin
+          SiteInspector.hydra.queue(request)
+          SiteInspector.hydra.run
+
+          response = request.response
+          if response.success?
+            JSON.parse(response.body).first
+          else
+            {}
+          end
+        end
+      end
+
+      def url
+        url = Addressable::URI.parse(ENDPOINT)
+        url.query_values = { urls: endpoint.uri }
+        url
+      end
+
+      def api_key
+        @api_key ||= ENV['WAPPALYZER_API_KEY']
+      end
+    end
+  end
+end
diff --git a/site-inspector.gemspec b/site-inspector.gemspec
index ca54907..bfff8d4 100644
--- a/site-inspector.gemspec
+++ b/site-inspector.gemspec
@@ -20,6 +20,7 @@ Gem::Specification.new do |s|
   s.add_dependency('cliver', '~> 0.0')
   s.add_dependency('colorator', '~> 1.1')
   s.add_dependency('dnsruby', '~> 1.0')
+  s.add_dependency('dotenv', '~> 2.0')
   s.add_dependency('gman', '~> 7.0', '>= 7.0.4')
   s.add_dependency('mercenary', '~> 0.0')
   s.add_dependency('nokogiri', '~> 1.0')
@@ -28,6 +29,7 @@ Gem::Specification.new do |s|
   s.add_dependency('public_suffix', '~> 4.0')
   s.add_dependency('sniffles', '~> 0.0')
   s.add_dependency('typhoeus', '~> 1.0')
+  s.add_dependency('urlscan', '~> 0.6')
   s.add_dependency('whois', '~> 5.0')
 
   s.add_development_dependency('pry', '~> 0.0')
diff --git a/spec/checks/site_inspector_endpoint_wappalyzer_spec.rb b/spec/checks/site_inspector_endpoint_wappalyzer_spec.rb
new file mode 100644
index 0000000..a661d6d
--- /dev/null
+++ b/spec/checks/site_inspector_endpoint_wappalyzer_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe SiteInspector::Endpoint::Wappalyzer do
+  subject { described_class.new(endpoint) }
+
+  let(:domain) { 'http://ben.balter.com.com' }
+  let(:endpoint) { SiteInspector::Endpoint.new(domain) }
+  let(:url) { "https://api.wappalyzer.com/lookup/v2/?urls=#{domain}/" }
+
+  before do
+    path = File.expand_path '../fixtures/wappalyzer.json', __dir__
+    body = File.read path
+    stub_request(:get, url).to_return(status: 200, body: body)
+  end
+
+  it 'returns the API response' do
+    expected = {
+      'Analytics' => ['Google Analytics'],
+      'CDN' => %w[Cloudflare Fastly],
+      'Caching' => ['Varnish'],
+      'Other' => %w[Disqus Jekyll],
+      'PaaS' => ['GitHub Pages'],
+      'Web frameworks' => ['Ruby on Rails']
+    }
+    expect(subject.to_h).to eql(expected)
+  end
+
+  it 'fails gracefully' do
+    stub_request(:get, url).to_return(status: 400, body: '')
+    expect(subject.to_h).to eql({})
+  end
+end
diff --git a/spec/fixtures/wappalyzer.json b/spec/fixtures/wappalyzer.json
new file mode 100644
index 0000000..20a796b
--- /dev/null
+++ b/spec/fixtures/wappalyzer.json
@@ -0,0 +1,125 @@
+[
+   {
+      "url":"https://ben.balter.com",
+      "technologies":[
+         {
+            "slug":"cloudflare",
+            "name":"Cloudflare",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":31,
+                  "slug":"cdn",
+                  "name":"CDN"
+               }
+            ]
+         },
+         {
+            "slug":"varnish",
+            "name":"Varnish",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":23,
+                  "slug":"caching",
+                  "name":"Caching"
+               }
+            ]
+         },
+         {
+            "slug":"disqus",
+            "name":"Disqus",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               
+            ]
+         },
+         {
+            "slug":"google-analytics",
+            "name":"Google Analytics",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":10,
+                  "slug":"analytics",
+                  "name":"Analytics"
+               },
+               {
+                  "id":61,
+                  "slug":"saas",
+                  "name":"SaaS"
+               }
+            ]
+         },
+         {
+            "slug":"jekyll",
+            "name":"Jekyll",
+            "versions":[
+               "v3.9.0"
+            ],
+            "trafficRank":11,
+            "categories":[
+               
+            ]
+         },
+         {
+            "slug":"ruby-on-rails",
+            "name":"Ruby on Rails",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":18,
+                  "slug":"web-frameworks",
+                  "name":"Web frameworks"
+               }
+            ]
+         },
+         {
+            "slug":"fastly",
+            "name":"Fastly",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":31,
+                  "slug":"cdn",
+                  "name":"CDN"
+               }
+            ]
+         },
+         {
+            "slug":"github-pages",
+            "name":"GitHub Pages",
+            "versions":[
+               
+            ],
+            "trafficRank":11,
+            "categories":[
+               {
+                  "id":62,
+                  "slug":"paas",
+                  "name":"PaaS"
+               }
+            ]
+         }
+      ],
+      "crawl":true
+   }
+]
\ No newline at end of file