| CMS & Website Builders | |
| WordPress Open-source CMS powering websites, blogs, and content management | 57.6M sites |
| Web Analytics & Measurement | |
| Google Tag Manager Tag management system deploying analytics and marketing tags without code | 53M sites |
| Advertising & Conversion Tracking | |
| Amazon Advertising Amazon's advertising and product promotion platform. | 94.3K sites |
| DoubleClick Floodlight Google tag tracking conversions from advertising campaigns | 3.3M sites |
| Google AdSense Google program displaying ads and monetizing site content | 4M sites |
| Google Publisher Tag Google Ad Manager tag serving ads into page slots | 433.5K sites |
| theTradeDesk Programmatic advertising demand-side platform. | 117.8K sites |
| Marketing & Email Campaigns | |
| DoubleClick Campaign Manager (DCM) Google ad serving and campaign tracking platform for advertisers | 18.2K sites |
| Hosting & Cloud Providers | |
| Csc Corporate domain registrar and enterprise services provider. | 1M sites |
| Security & Bot Defense | |
| HSTS HTTP header forcing browsers to use secure HTTPS connections | 122.9M sites |
| Privacy & Cookie Consent | |
| Funding Choices Google consent management for publisher ad compliance. | 202.3K sites |
| OneTrust Privacy, consent, and compliance management platform | 3.8M sites |
| Languages & Back-End Frameworks | |
| PHP Server-side scripting language powering a large share of websites | 91.4M sites |
| Databases & Caching | |
| MySQL Popular open-source relational database used by many web applications | 59.5M sites |
| Performance & Optimization | |
| SpeedCurve Web performance monitoring and front-end speed analytics service | 9.7K sites |
| Media, Maps & Social | |
| dc.js JavaScript library rendering interactive dimensional charts | 1.2M sites |
| SEO & Content Discovery | |
| Open Graph Metadata protocol controlling how page links preview on social platforms | 127.7M sites |
| RSS Web feed format syndicating site content for readers and aggregators | 54.2M sites |
| other | |
| ID5 Shared advertising identity service for cookieless ad targeting | 33.9K sites |
| Integral Ad Science Ad verification and viewability measurement service for advertisers | 13.6K sites |
| LiveIntent Advertising platform for placing ads in email newsletters | 26.3K sites |
| OpenWeb | 130 sites |
| comScore Audience measurement and web analytics service for publishers and advertisers | 10.9K sites |
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