WordPress powers roughly one-third of all websites on the internet

WordPress runs somewhere between 43 and 46 percent of all websites that have a detectable content management system. That number shifts slightly depending on who measures it — different tracking services count differently — but the range is consistent. To put it plainly: if you visit ten random websites, roughly four or five are probably built on WordPress.

This matters because WordPress is free, open-source software that anyone can read and install. It started as a blogging tool in 2003 and grew into a platform that powers everything from personal blogs to news sites to online stores. The reason so many websites use it is not that it is the only option, but that it is accessible to people who are not programmers.

The actual number of WordPress sites is harder to pin down than the percentage. Tracking services like W3Techs and Similarweb estimate the installed base, but they can only count sites they can see — private sites, internal company networks, and sites behind paywalls do not show up in their data. The real number is almost certainly higher than any public count.

Key Takeaways

  • WordPress runs between 43 and 46 percent of websites with a detectable content management system, making it the most common platform by a wide margin.
  • The percentage varies slightly by measurement method because different tracking services crawl different parts of the internet and count in different ways.
  • WordPress popularity grew because it is free, does not require coding knowledge to set up, and can be extended with plugins and themes.
  • The actual number of WordPress sites is higher than public counts show, because tracking services cannot see private sites or sites behind paywalls.

Why the numbers vary depending on who is counting

Different tracking services produce different percentages because they use different methods to find and count websites. W3Techs crawls the top 10 million websites by traffic and checks which ones use WordPress. Similarweb uses a different sample. BuiltWith uses yet another approach. Each method has blind spots.

A site that uses WordPress but hides the fact — by removing WordPress-specific code from the page source — will not show up in these counts. A site that uses WordPress.com (the hosted version) versus WordPress.org (the self-hosted version) may or may not be counted depending on the service. A site that is behind a login wall or a paywall will not be crawled at all.

The variation between 43 and 46 percent is not a sign that the numbers are wrong. It is a sign that they are estimates based on samples, and different samples produce slightly different results. All of them agree on the core fact: WordPress is the dominant platform by a large margin.

How WordPress became so common

WordPress started as software you could read and run on your own server. Unlike many website builders that charge monthly fees, WordPress itself is free. You pay only for hosting — the server space where your site lives — which costs anywhere from a few dollars a month to hundreds, depending on how much traffic you get.

The second reason is ease of use. You do not need to write code to build a WordPress site. You can install a theme — a pre-designed template — and start publishing content when ready. If you want to add features, you install a plugin, which is a small piece of code that someone else wrote and packaged for you.

The third reason is that WordPress is open-source, meaning anyone can look at the code, modify it, and share their modifications. This created a massive ecosystem of developers building themes and plugins. If you want your site to do something specific, there is probably a plugin for it, or someone who will build one.

The difference between WordPress.com and WordPress.org

WordPress.com is a hosted service run by Automattic, the company that employs many of WordPress's original developers. You sign up, choose a design, and start publishing. You do not manage a server. Automattic does that for you. You pay them monthly, and they handle updates and security.

WordPress.org is the free software itself. You read it, install it on a server you rent or own, and manage it yourself. You are responsible for updates, backups, and security. This version is more flexible — you can modify the code, install any plugin you want, and keep all the money your site makes — but it requires more technical knowledge or willingness to learn.

Tracking services count these differently. Some count WordPress.com sites as WordPress. Some do not. This is one reason the percentages vary. The vast majority of the WordPress market share comes from WordPress.org, the self-hosted version, because it is cheaper at scale and gives site owners more control.

What WordPress is used for beyond blogs

WordPress started as blogging software, but it evolved into a general-purpose content management system. News organizations use it to publish articles. Small businesses use it to build websites with contact forms and service descriptions. Online stores use it with WooCommerce, a plugin that adds shopping cart and payment processing.

Universities use WordPress for department websites. Nonprofits use it for fundraising sites. Podcasters use it to host show notes and archives. The reason WordPress works for all these uses is that it is flexible enough to be adapted to different purposes without requiring a complete rewrite.

This flexibility is also why WordPress dominates. A platform that works well for one specific purpose — like blogging, or selling products, or building a portfolio — will always lose market share to a platform that works reasonably well for many purposes. WordPress is the generalist, and generalists win when the market is diverse.

How market share is measured and what it actually means

When a tracking service says WordPress has 46 percent market share, it means 46 percent of websites in their sample use WordPress. This is different from saying WordPress is used by 46 percent of internet users. A single WordPress site might serve millions of users, while a custom-built site might serve thousands.

Market share by website count is useful for understanding the landscape of the internet — it tells you what tools are popular among site builders. But it does not tell you where most internet traffic goes. Google, Facebook, and Amazon are not built on WordPress, and they receive enormous amounts of traffic. A user spending eight hours a day on Facebook is not counted in WordPress market share, even though they are spending time on the internet.

The number also does not include websites that do not have a content management system at all. A site built entirely in custom code, or a site that is just static HTML files, will not show up in these counts. These are less common than they used to be, but they still exist.

Why WordPress dominance might change or stay the same

WordPress has been the market leader for nearly two decades, and there is no sign that is changing soon. Competitors like Wix, Squarespace, and Shopify have taken market share in specific niches — Wix for small business websites, Shopify for online stores — but none of them have come close to WordPress's overall dominance.

The reason is network effects. Because so many people use WordPress, there are thousands of developers building plugins and themes for it. Because there are thousands of plugins and themes, more people choose WordPress. This cycle is hard to break. A new platform would have to offer something significantly better to overcome the advantage of an established ecosystem.

That said, WordPress is not without weaknesses. It requires more technical knowledge than some competitors. It requires you to manage your own security and updates if you self-host. It can be slow if it is not configured properly. But for the vast majority of people building websites, these weaknesses are acceptable trade-offs for the flexibility and low cost.

Frequently Asked Questions

Does WordPress market share include WordPress.com sites?

It depends on the tracking service. Some include WordPress.com in their count, some do not. This is one reason different services report slightly different percentages. WordPress.com sites are a smaller portion of the total, so including or excluding them does not change the overall picture much.

Is WordPress used by most of the biggest websites on the internet?

No. The largest websites — Google, Facebook, Amazon, YouTube, Wikipedia — are built on custom platforms or other systems. WordPress dominates by number of sites, not by traffic volume. Most internet users probably visit non-WordPress sites more often than WordPress sites, even though most websites are WordPress.

Can you tell if a website is built on WordPress just by looking at it?

Sometimes. If a site uses a popular WordPress theme, it may look similar to other WordPress sites. But many WordPress sites are heavily customized and look unique. The only reliable way to check is to look at the page source code or use a browser extension designed to detect WordPress.

Why do tracking services not count all websites?

Because they can only see websites that are publicly accessible and crawlable. Private company intranets, sites behind paywalls, and sites that block search engine crawlers do not show up. This means the real number of WordPress sites is higher than any public count.

Is WordPress market share growing or shrinking?

It has been relatively stable for several years, hovering in the 40 to 46 percent range. It is not growing rapidly, but it is not declining either. The market for website builders is growing overall, so WordPress is growing in absolute numbers even if its percentage of the total stays the same.