| CMS & Website Builders | |
| WordPress Open-source CMS powering websites, blogs, and content management | 75.7M sites |
| WordPress Themes & Plugins | |
| SiteOrigin Page Builder WordPress plugin building page layouts with widgets | 449.1K sites |
| SiteOrigin Widgets Bundle WordPress plugin providing a collection of page widgets | 232.8K sites |
| Email & Push Marketing | |
| Zoho Business software suite including CRM and productivity tools | 2.2M sites |
| Business Email & Productivity | |
| Zoho Mail Business email hosting service from Zoho | 2.6M sites |
| Communications | |
| Amazon SES Amazon service for sending transactional and bulk email | 1.3M sites |
| Hosting & Cloud Providers | |
| IONOS Web hosting and domain provider offering managed plans | 12.6M sites |
| Plesk Web hosting control panel for managing servers and sites | 6.6M sites |
| Security & Bot Defense | |
| reCAPTCHA Google service distinguishing humans from bots to block spam | 16M sites |
| Web Servers & Operating Systems | |
| Nginx High-performance web server and reverse proxy widely deployed | 153.2M sites |
| Languages & Back-End Frameworks | |
| PHP Server-side scripting language powering a large share of websites | 114.2M sites |
| JavaScript Libraries & Widgets | |
| FitVids.JS JavaScript utility making embedded videos responsive | 5M sites |
| Lightbox JavaScript script displaying images in an overlay popup | 7.6M sites |
| Smart Slider 3 WordPress plugin building responsive sliders and galleries | 689K sites |
| jQuery Widely used JavaScript library simplifying DOM manipulation, events, and AJAX | 114.7M sites |
| jQuery Migrate Compatibility shim restoring deprecated jQuery APIs for older code | 53M sites |
| Databases & Caching | |
| MySQL Popular open-source relational database used by many web applications | 77.9M sites |
| SEO & Content Discovery | |
| RSS Web feed format syndicating site content for readers and aggregators | 71.1M sites |
| Fonts & Icons | |
| Google Font API Google service delivering free web fonts to websites | 105.7M sites |
| other | |
| ACME/Let's Encrypt Free TLS certificates issued automatically over the ACME protocol | 11.7M sites |
| Akismet Anti-spam: Spam Protection Social & Community | 4M sites |
| Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder Forms & Popups | 428.3K sites |
| Sowb | 297.7K sites |
| Page Builder by SiteOrigin Design & Themes | 116K sites |
| Iawp | 110.1K sites |
| Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution Productivity & Operations | 12K sites |
| Bitform | 7.9K sites |
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