According to W3Techs, as of early 2025, WordPress is used by 43.4% of all websites on the internet. Translated into absolute numbers, that is well over 800 million websites — a figure so large it is difficult to grasp. WordPress also commands 62.7% of the CMS market, meaning that of every website using a content management system, nearly two-thirds runs on WordPress.
These are not static numbers. When WordPress launched in 2003, it held zero percent of the market. By 2011 it reached 14%. By 2020 it crossed 37%. The trajectory has been relentless, and every expert projection points upward.
How Did WordPress Get Here?
No single factor explains WordPress's dominance. It is the accumulation of several self-reinforcing advantages that compounded over more than two decades.
1. Open Source and Free Forever
WordPress is licensed under the GNU General Public License (GPL), which means the core software costs nothing and can be freely modified and redistributed. This lowered the barrier to entry for millions of developers and site owners who otherwise could not afford commercial CMS licences. A bootstrapped startup and a Fortune 500 company start from the same codebase.
2. A Massive Plugin and Theme Ecosystem
WordPress.org hosts more than 59,000 free plugins and over 11,000 free themes. The commercial market adds tens of thousands more. Need an e-commerce store? WooCommerce. Need SEO tooling? Yoast or Rank Math. Need a membership site, a learning platform, or a booking system? There is a mature plugin for every use case. This ecosystem network effect makes WordPress a platform rather than merely a CMS.
3. SEO Friendliness
WordPress generates clean, semantic HTML and integrates seamlessly with best-in-class SEO plugins. Google has repeatedly acknowledged that well-configured WordPress sites perform excellently in search. Many of the world's most-trafficked blogs — including sites operated by major media organisations — run on WordPress precisely because of how readily it accommodates SEO best practices.
4. Community and Talent Pool
The WordPress developer community is enormous. There are more than 3 million WordPress developers worldwide. Finding a developer, an agency, or a freelancer who knows WordPress is significantly easier than finding expertise in any competing CMS. This means the total cost of ownership for businesses is lower, and the knowledge base on Stack Overflow, YouTube, and community forums is unparalleled.
5. Continuous Development
WordPress publishes major releases multiple times per year. The Gutenberg block editor, introduced in WordPress 5.0, was a profound investment in the future of visual editing. Full Site Editing (FSE), maturing since WordPress 5.9, gives site owners granular control over every part of their layout without touching code. These investments ensure WordPress keeps pace with evolving expectations.
Who Uses WordPress in 2025?
WordPress is not just for bloggers. Its user base spans every category of website:
- News and media: The New York Times, BBC America, Reuters, and Rolling Stone all use WordPress for significant parts of their digital presence.
- E-commerce: WooCommerce, WordPress's e-commerce extension, powers approximately 28% of all online stores globally.
- Government: Dozens of local and national government bodies use WordPress for public information portals.
- Education: Universities and e-learning platforms use WordPress to deliver courses and manage student communities.
- Small businesses: The overwhelming majority of WordPress sites are small businesses and personal brands who chose WordPress because it gives them enterprise-grade capabilities at a fraction of the cost.
The Competitive Landscape
WordPress's nearest CMS competitors illustrate just how dominant it is:
- Shopify — 6.3% of all websites (focused narrowly on e-commerce)
- Wix — 2.5%
- Squarespace — 2.0%
- Joomla — 1.6%
- Drupal — 1.3%
Combined, all WordPress competitors account for roughly 15% of all websites. WordPress accounts for more than twice that on its own.
What This Means for Site Owners in 2025
The scale of WordPress's dominance has practical implications for everyone running a WordPress site:
The Management Challenge Scales Too
More websites means more complexity. A WordPress site today typically involves dozens of plugins, a theme framework, custom code, a media library, user management, and integration with third-party services. Managing all of this manually — logging in to make changes, reading documentation, running WP-CLI commands — consumes enormous time.
AI-Powered Management Is the Next Evolution
The natural response to increasing complexity is tooling that reduces the cognitive load of management. AI agents that can interpret natural language instructions and execute changes directly — creating content, adjusting settings, managing WooCommerce — represent the same evolution in WordPress management that WordPress itself represented over static HTML websites.
Tools like WP AI Agent are designed specifically for this environment: a world where WordPress is everywhere, sites are increasingly complex, and site owners need to accomplish more with less time spent on administration.
The Bottom Line
WordPress at 43% market share is not a temporary anomaly. It is the accumulated result of 22 years of open-source development, community growth, and continuous investment in the platform. For site owners, developers, and businesses, this dominance means stability: WordPress will not disappear, its ecosystem will only grow, and the return on expertise in WordPress will remain high for the foreseeable future.
The question is not whether to use WordPress — for most sites, it remains the obvious choice — but how to manage it efficiently as its capabilities and complexity continue to grow.