A new minor updated version of the BuiltWith API is now available.


Main change to this API are the additional of “First Indexed” and “Last Indexed” fields on the Path and Result objects.

This new feature allows you to quickly determine the oldest index date for a website in our system and the most recent date. A feature requested on both the Pro tool and the API.

As always the API is backwards compatible and anyone using v1 to v7 of the API can continue to do so as per normal.

BuiltWith Trends Investor Center

The BuiltWith Trends Investor Center helps you find fast and slow growing technologies by user base growth as well as total site coverage count.

Investor Center

This premium feature has multiple use cases –

  • Investors can discover technologies that are growing but are still potentially under the radar due to their small user base.
  • Business owners can determine what technologies in specific categories might be a better alternative for them based on their market share growth or decline.

View some examples we’ve created that show some of the functionality of the Investor Center and a run down of the options you can filter by on the Investor Center.


What technologies do the Unicorn Companies Use?

As of January 2016 there’s around 145 known “Unicorn” companies – these are companies that are private with a valuation in excess of US $1bn – you can see the full list of actual companies on Fortune and follow the funding on Crunchbase.

We thought it would be interesting to find out what technologies were popular on these $1bn+ privately valued companies.

Attribution: Valerie Everett

Attribution: Valerie Everett

Where do Unicorns host their websites?

The short answer is Amazon – 50% of the sites in the list are in an Amazon Data Center, mostly in Virginia but some also in Oregon, California and Singapore.

Where Unicorns Host

What do Unicorns use for Analytics?

86% of the Unicorn sites have Google Analytics installed. New Relic, Optimizely and Marketo are also popular premium tools on the Unicorn website list –

Unicorn Analytics

Other Interesting Unicorn Technology Usage

  • 95% of Unicorn sites use JQuery – the most detected technology in the list
  • 90% have a Viewport Meta tag – meaning they are most likely responsive and will work across mobile and handheld devices
  • nginx is the most popular web server found on 66% of the websites
  • Google Apps for Business is the most popular email system found used on 62% of Unicorn websites.

You can generate and get access to the full list of Unicorn company websites via our Curated Reports lists on the BuiltWith Pro tool.

Happy New Year 2016


We hit a milestone on the 25th of December this year of 100,000 signups! Thanks for using BuiltWith! Next year will be our ninth year of operation and we’re looking forward to developing new tools, solutions and uncovering even more ways to find out what the internet is built with!

Premium Technology Acquisition Gains – Q4 2015

We’ve just finished an Entire Internet Update process we’re going to have a look at some of the winners in terms of customer acquisition for premium technologies in this post.

The criteria for these companies is they –

  • Had to have at least 1000 domains running their software at our last entire internet update in June 2015.
  • Must have a payment option for their software
  • Sorted by the multiplier of growth not just increase in domain coverage

Here are the results –

Entire Internet Update Premium Technology Winners

HotJar grew 2.4x in the 4 months between updates – they provide an all-in-one analytics and feedback solution.

JotForm provides drag and drop form building features and has seen a 3.4x growth in the past few months. JotForm does have a free solution as well which may account for some of this growth.

Sift Science provides fraud management services and lists airbnb as one of their customers, the amount of websites they appeared on doubled in the past 4 months.

Sentry  is a real time crash reporting app for websites – it help find client bugs and is used by stripe, uber and Instragram. They almost doubled the amount of sites we detected it on.

GetSocial is a viral content promoting tool that more than doubled the amount of sites we detected it on!

ClickFunnels provides a marketing funnel builder tool to try to increase conversion rates, their software was found on 1.8x more sites this update.

Intercom is normally used as an internal web app tool for communicating with end users – we saw a non-logged in increase in usage of this tool almost doubling.

GoSquared provides analytics and reporting tools for businesses. We saw a 1.7x increase in its deployment on domains.

Klaviyo provides a marketing tool to segment, send reminders and personalized newsletters – it increased it’s domain coverage by 1.6x.

Congrats to all of these providers!


Payment Currency Based Reports

We started tracking Payment Currency on BuiltWith – this new functionality looks for websites that support the payment of goods in currencies such as Euros (for most of Europe), Pound Sterling (for the United Kingdom), Yen (for Japan), New Shekel (for Israel).


The advantage of this tracking is that you can easily see which stores are supporting international payments. For example you could create a report on All Stores using Magento that sell in Pound Sterling, the currency of the United Kingdom.

This new tracking method is live in the tool and available to all users on all plans.

WordPress vs Joomla vs Drupal – The Battle Of The CMS

The are a lot of articles out there weighing up the pros and cons of different Content Management Systems (or CMS as they’re often called). This is going to be a little different.

Instead of comparing feature lists or the pros and cons of each, in this article we’re going to take a look at some data. Which CMS is the most popular? Which is growing at the fastest rate? Are users switching between systems, and if so, which are they leaving and where are they moving to?

We’ll get to all of that a little later on. For now though, let’s start at the beginning.


The CMS Landscape

Long gone are the days of having to write code from scratch to build beautiful websites, unless you really want to of course. There’s a broad range of options available to build platforms to publish content, store images, documents or anything else you might want to use a website for. Content management systems, as the name would suggest, exist to allow users to effectively manage their online content.

Although there are a lot of options available, when looking at all of the sites on the Internet there is one CMS that really dominates. More than 16 million domains in our index are built on WordPress, which represents around 50% of all the sites out there that are currently using a CMS.

CMS Usage Statistics

CMS Usage Statistics

What’s also surprising about the numbers though, is that 35% of all sites that use a CMS that’s not one of the top 10 we’re tracking here. There’s a significant long tail in Content Management Systems. There isn’t room here to look in any detail at all of the different CMS’s out there, so I’m going to focus on the top three in terms of usage: WordPress, Joomla! and Drupal.

Although WordPress has the majority no matter which way you look at it, it’s lead is cut when we only look at the top 10,000 sites (instead of all sites on the Internet). Joomla! also has a bigger share of the market when we’re looking at the entire Internet (9%), which fades when considering only the top 10,000 sites (1%). Drupal on the other hand is more of a CMS of choice for the bigger sites out there. Drupal can be found on 9% of the top 10,000 sites, but only 2% of all of the sites on the Internet.

Top 10K (%)
Top 100K (%)
Top Million (%)
All Internet (%)

Let’s take a closer look at the big three.



WordPress launched more than a decade ago in 2003 with the intent of improving the typography of everyday writing. Now, it’s grown into the largest self-hosted blogging tool in the world. WordPress also offers a hosted blogging platform at WordPress.com, but we’ve not included the stats for sites built using that version of WordPress here.

WordPress is widely used and has been consistently growing in use since it’s launch. If anything, the last 18 months have seen that growth accelerate. Among sites of all sizes, WordPress is seen as the CMS of choice with it’s flexibility, adaptability and stability providing strong foundations for sites across the Internet.

WordPress Trends

WordPress Trends


Drupal is the smallest of the three CMS we’re looking at here, which we’ve found on a little over 800,000 live websites. It’s another open source CMS with an active and supportive community. Drupal is especially popular for websites in the education vertical, with a much higher proportion of it’s sites being focused on education than either WordPress or Joomla!

As with WordPress, Drupal’s growth has accelerated over the last 18 months, as shown in the chart below.

Drupal Trends



Like the other two systems we’re looking at here, Joomla! is an open source CMS. It’s the second most popular CMS out there which we’ve found on more than 2.8 million websites. Joomla! is less likely to be found on one of the top 10K websites, with only 1% of those using a CMS choosing Joomla!. Joomla! is much more popular among smaller sites though, claiming a 9% slice of the pie for all sites on the Internet.

Overall, Joomla! has seen growth over the last few years. However, the rate of growth hasn’t been as steady as either Drupal or WordPress.


How Users Are Moving Between These Three CMS

While all of these platforms are growing in absolute terms, there is a clear flow of users moving from and to each platform. WordPress looks like the entry-point tool, and doesn’t gain many users from either Drupal or Joomla. It seems that once people have used either Drupal or Joomla, it’s unlikely that they’ll move over to WordPress.

The same is not the case in the opposite direction though. Year upon year, WordPress is losing more users to Drupal and Joomla! In 2014, more than 8500 users moved away from WordPress, replacing the CMS with either Joomla or Drupal.

Drupal also does well with users leaving Joomla!. Although there is some movement in both directions, in net terms more than 2000 websites have moved from Joomla! to Drupal over the last 4 years.


What’s Next For CMS?

With these three content management systems making it easier and easier to host content online in a useful and attractive way, the growth of these CMS looks set to continue. There are plenty of other systems also doing well as more and more websites are launched as time goes by. If you’d like to dig a little deeper into any of the data shown here, head over to our CMS pages. You might find a Pro account helps you uncover some gems too.


Users of the BuiltWith Pro tool now have the opportunity to submit and vote on new ideas for the product.


We’ve always based new features on what people want the most, this makes it more visible and simpler for you to vote on changes and upgrades to the Pro tool!

You can access the idea section of BuiltWith via the sidebar on your Basic/Pro or Enterprise dashboard!

First Indexed Date now in Exports

We’ve just added a new field to our exportable reports called “First Indexed”. This field lets you see the date we first indexed any technologies on a domain.

This new field can help you determine if the indexation date for a technology is the same date as when we first started tracking the website or not.

For existing reports just regenerate them, the new field is on both the meta data and CRM style format exports.

For a full list of exportable fields please see this article.