Some WordPress Core Contributor stats

The Inspiration

Earlier this week David Bisset asked:

This got me curious. Is this data out there? How might one get it?

I started looking at core release posts and saw that contributors are linked, which gave me the idea to scrape it and see what I could come up with.

Caveats about this data

  1. Since this data is from the thanked contributors in core release posts, it includes more than just code contributions. It also includes documentation, testing, design, marketing, etc.
  2. I only included data from 5.0-6.0 named releases.
    • 5.0 was released in December 2018, almost 4 years ago. 4 years seemed far enough to go back.
    • I only included named core releases, as those are the larger ones that more people contribute to. The maintenance and security releases have a much smaller set of contributors.
  3. The data gets less accurate the further I go back in terms of release dates because I can only scrape their current profile, not their previous profiles. Some most likely switched employers.
  4. The data is only as accurate as the profiles on Not all profiles have employers listed. There are some folks I know work for big companies in the WordPress ecosystem and contribute to core who do not have an employer listed. I did not add any that were missing, I went by what is available.
  5. I had to do a lot of manual clean up to make the data consistent, which is typical when you scrape data from the web. If I made a mistake or missed something, that mistake is mine alone.
  6. In full transparency, I work at Automattic. This exploration was not done as part of my work there, but as a curious member of the community. In the WordPress project, I am a part of the Photos team.
  7. There are many other ways to contribute to the WordPress ecosystem and project that are not captured in this data. I only pulled data on contributors to named core releases.
  8. It is possible I made some scraping, formula, or calculation mistakes. If you find something wrong, please let me know.

Contributors to named core releases, grouped by company, for versions 5.0-6.0

Note: If someone has an employer listed on their profile, that does not necessarily mean they are sponsored by that company. If you want to know about sponsored contributors, go to the Sponsored section.

Core release6.
Total contributors551658560502679866592707385550477
Company 1Automattic (77, 14%)Automattic (94, 14.3%)Automattic (88, 15.7%)Automattic (66, 13.1%)Automattic (79, 11.6%)Automattic (87, 10%)Automattic (60, 10.1%)Automattic (61, 8.6%)Automattic (42, 10.9%)Automattic (55, 10%)Automattic (62, 13%)
Company 210up (15, 2.7%)Yoast (14, 2.1%)Yoast (12, 2.1%)10up (12, 2.4%)Yoast (14, 2.1%)10up (16, 1.8%)10up (11, 1.9%)Yoast (16, 2.3%)10up (11, 2.9%)Yoast (20, 3.6%)10up (14, 2.9%)
Company 3Yoast (10, 1.8%)10up (11, 1.7%)10up (11, 2%)Yoast (11, 2.2%)10up (13, 1.9%)Whodunit (11, 1.3%)Yoast, Whodunit, Human Made (7, 1.2%)10up (14, 2%)Human Made (6, 1.6%)10up (16, 2.9%)Human Made (11, 2.3%)
Company 4Multidots (9, 1.6%)Multidots (10, 1.5%)Human Made (5, 0.9%)XWP, Google (6, 1.2%)Awesome Motive (8, 1.2%)Yoast, rtCamp (9, 1%)XWP (6, 1%)Human Made (9, 1.3%)Yoast (5, 1.3%)Human Made (9, 1.6%)Yoast (10, 2.1%)
Company 5rtCamp (6, 1.1%)XWP (6, 0.9%)XWP, rtCamp Google, Bluehost, Awesome Motive, Alley (4, 0.7%)Awesome Motive (5, 1%)XWP (6, 0.9%)XWP, WP Engine, Human Made (8, 0.9%)Multidots, Google, Bluehost (4, 0.7%)Multidots (7, 1%)Google (4, 1%)rtCamp (7, 1.3%)Bluehost (6, 1.3%)
No company listed245 (44.5%)306 (46.5%)259 (46.3%)238 (47.4%)332 (48.9%)434 (50.1%)307 (51.9%)348 (49.2%)182 (47.3%)247 (44.9%)230 (48.2%)
Company name (Count of employed contributors, percentage of the total number of contributors)

Individuals who contributed to all 11 of the most recent named core releases

49 people have contributed to all 11 releases (5.0-6.0) I pulled data for. I think these people deserve special recognition:

The companies these awesome individuals work for:

  • Automattic (13)
  • Google (4)
  • 10up (3)
  • Alley (2)
  • XWP (2)
  • Yoast (2)
  • Accessible Web Design (1)
  • Advies en zo (1)
  • Awesome Motive (1)
  • Bluehost (1)
  • Dekode Interaktiv AS (1)
  • FlipMetrics (1)
  • GoDaddy (1)
  • Happy Prime (1)
  • Human Made (1)
  • Parship Group (1)
  • Penske Media Corporation (1)
  • SendtoNews Incorporated (1)
  • Shopify (1)
  • Whodunit (1)
  • iThemes (1)
  • required (1)

7 of these individuals has no employer listed in their profile.

27 of these individuals have the Sponsored tag on their profile.

These are the number of contributors per release that have the Sponsored tag in their profile. This is a count of sponsored contributors, not necessarily a good breakdown of the amount contributed by each.

Core release6.
Total contributors551658560502679866592707385550477
Sponsored %19.9%18.9%18.4%15.3%15.6%12%11.3%10.2%14%11.5%13%

These are the sponsored contributors grouped by company. Includes count of sponsored contributors and the percentage of the total number of sponsored contributors for that release.

Core release6.
Company 1Automattic (61, 55.5%)Automattic (65, 52%)Automattic (55, 53.4%)Automattic (32, 41.6%)Automattic (43, 40.6%)Automattic (36, 34.6%)Automattic (24, 35.8%)Automattic (23, 31.9%)Automattic (16, 29.6%)Automattic (16, 25.4%)Automattic (21, 33.9%)
Company 2XWP (7, 6.4%)Yoast (10, 8%)Yoast (7, 6.8%)Yoast (8, 10.4%)Yoast (11, 10.4%)Whodunit (7, 6.7%)Yoast (6, 9%)Yoast (10, 13.9%)Yoast (5, 9.3%)Yoast (11, 17.5%)Yoast, XWP (6, 9.7%)
Company 3Yoast (6, 5.5%)Multidots (6, 4.8%)XWP (5, 4.9%)XWP (5, 6.5%)XWP, 10up (5, 4.7%)Yoast, XWP, WP Engine (6, 5.8%)Whodunit (5, 7.5%)Whodunit, Google (4, 5.6%)Google (4, 7.4%)XWP, Human Made, Google (4, 6.3%)Google (4, 6.5%)
Company 4Google, GoDaddy, Extendify (4, 3.6%)XWP (5, 4%)Google, 10up (4, 3.9%)Google, 10up (4, 5.2%)WP Engine, Google, Awesome Motive (4, 3.8%)Human Made, Google, Awesome Motive (4, 3.8%)Google (4, 6%)XWP, Human Made (3, 4.2%)XWP, Human Made, Bluehost, 10up (3, 5.6%)10up (3, 4.8%)Human Made, Bluehost, 10up (3, 4.8%)
Company 5Multidots, Human Made, Awesome Motive (3, 2.7%)Google, Bluehost (4, 3.2%)GoDaddy, Awesome Motive (3, 2.9%)WP Engine, Whodunit, Required, Human Made, GoDaddy, Bluehost, Awesome Motive (2, 2.6%)Human Made, Extendify, Bluehost (3, 2.8%)GoDaddy, Bluehost, 10up (3, 2.9%)XWP, Human Made, 10up (3, 4.5%)WP Engine, rtCamp, Required, Bluehost, Awesome Motive, 10up (2, 2.8%)WP Engine, WebDevStudios, Awesome Motive (2, 3.7%)WPMUDEV, Whodunit, WebDevStudios, Required, Bluehost, Awesome Motive (2, 3.2%)WebDevStudios Required (2, 3.2%)
Company name (Count of sponsored contributors, percentage of the total number of sponsored contributors)

How I gathered and analyzed this data

  1. For each named core release (I.e. 6.0 “Arturo”, 5.9 “Josephine”, etc) I used the free version of Data Miner to pull the list of thanked contributors in the release post.
    • You could do this with a script too, but I already had Data Miner installed and knew how to use it, so it was the fastest way to get what I needed.
    • The element I targeted: a
    • I saved the href attribute for each result in a text file.
  2. I looped through each text file of contributor URLs with a bash script and pulled in two fields from their profiles: Employer and Contributions.
    • I used curl, tr, awk, and pup to transform the data into something useable.
// Assumes an input file named 5-1.txt with a list of profile URLs
// requires pup
for url in $(head -n800 5-1.txt); do
    employer="$(curl -s $url | pup -p 'li#user-company text{}' | awk '{sub(/Employer:/,"")} 1' | tr -d '\n' | tr -d '\t')"
    contributions="$(curl -s $url | pup -p 'div.item-meta-contribution text{}' | tr -d '\n' | tr -d '\t')"
    echo "$url | $employer | $contributions" >> 5-1_contributors.txt
  1. I first started exploring the data in Google Sheets and made pivot tables for each named release.
    • This took a lot of data clean up to make the data more consistent. Since the Employer field is open text, there were lots of different versions of the same company (Company, Company Inc, Company PVT LTD, etc). I cleaned it up the best I could in the time I wanted to spend on it, but there are still probably some duplicates.
    • This gave me the table of stats for the companies represented in each named release.
    • I used regex to find which company sponsors a contributor based on their Contributions section on their profile and made a pivot table of this information.
  2. I used Datasette to explore a CSV of all contributors and which version they contributed to. This gave me the list of 49 people who contributed to all 11 versions I checked and which companies they work for.

Data sources

Want to take a look at this data?

More areas for exploration

  1. Code contributions from SVN?
    • Number of lines changed by contributor and also grouped by employer
  2. Finding more accurate data?
    • If there were snapshots of this data from each release, it would be nice to use those instead. I could only pull data from current profiles, and users may have switched employers. For example, up until recently mkaz worked at Automattic, but since he no longer does, his previous contributions are not grouped under Automattic.
    • Not all profiles have employers listed. There are some folks I know work for big companies in the WordPress ecosystem and contribute to core who do not have an employer listed.
  3. Graphing different facets of this data to see how it changes over time.

Likes, Bookmarks, and Reposts

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  • Rachel WINchester | designer, entrepreneur, orator
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  • WordPress ↗️ Freelance
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8 responses to “Some WordPress Core Contributor stats”

  1. […] Some WordPress Core Contributor stats […]

  2. WordPress Business News and Insights

    2022 Web Almanac CMS findings • WP Cloud • Sponsored core contributor and sponsor data • WP Biz Dev • Female-Owned and Led WP Businesses • and more →

    Estimated reading time: 3 minutes

    2022 Web Almanac CMS Report

    According to the CMS chapter of the just-released 2022 Web Almanac from the HTTP Archive, sites using a CMS — and WordPress — are still steadily increasing globally, and 34% of all the sites with an identifiable CMS were using a page builder. WordPress comes in at the bottom of the pack, however, when it comes to non-mobile device performance as measured by Core Web Vitals. For mobile, only Adobe Experience Manager performed worse — and by quite a margin. In terms of Lighthouse performance scores, WordPress was on par with its peers. MORE →

    This week’s WordPress Weather Report from Ellipsis: WordPress is up 0.02 to -0.02 under the baseline while WooCommerce holds steady at +0.02.

    What is WP Cloud? Who is it for? has been flying under the radar for a while. At the WP Minute, Matt Medeiros spoke with Jesse Friedman, Director of Innovation at Automattic, to learn more. WP Cloud is a Platform as a Service (PaaS) built on the hosting infrastructure that’s behind, Pressable, and WordPress VIP with GridPane soon to follow. Agencies that want to white label their client hosting are ideal customers for WP Cloud via GridPane. In Post Status Slack, there’s been a hearty discussion about where WP Cloud fits in the hosting industry and why you might want (or not want) to use it. MORE →

    WordPress Core Contributor Stats: 19.9% Sponsored for 6.0 Release

    Chuck Grimmet, who is on Automattic‘s Special Projects team for, “did some data exploration around WordPress core contributors and the companies they work for.” Chuck breaks down the data in detail with several tables on his blog. The results point toward nearly 20% of contributors being sponsored for the 6.0 release, assuming they were sponsored by the same company during that entire time. MORE →

    Quick Links

    Lawrence Ladomery has launched WP Biz Dev, “the first job board dedicated exclusively to Marketing and Sales roles for WordPress businesses.” MORE →Last week, Steve Burge asked on Twitter, “how many female-run WordPress companies are there?” A big list emerged in the replies. READ →Natasha Golinsky hosted a great webinar with Post Status for Agencies: Getting Paid for Discovery. Now Natasha has launched a Facebook group for women who own creative agencies: Management Code: Management Skills for Female Creative Agency Owners. JOIN →WP Tavern: WooSesh — the virtual conference for WooCommerce professionals and store builders — has posted the schedule for their upcoming three-day event beginning on October 11. DEETS →Do_the Woo: All You Should Know About the WooCommerce Agency Partner Program.At WP Mayor, Mark Zahra asks, “Is deceptive marketing ruining WordPress’s reputation?”Iconic: How to Prep Your Ecommerce Store for Black Friday 2022.Are you ready for a cookieless future?No, Website Quality Score is not (yet) a Google ranking factor.Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to email a link to a friend (Opens in new window)

  3. Jeremy Felt Avatar

    Good stuff!

    FWIW, I think the list on release posts is the same as that returned by the credits API. It may be a more consumable/reliable source to refresh over time.

    If you haven’t seen it yet, Jean-Baptiste Audras has been compiling various stats for releases. That data could help track employer changes, at least since 5.4.

    Actually seeing a list of code changes per employer would probably require re-scanning commit messages in core and pull requests in Gutenberg to match names and rebuild the log as employer focused.

    And along the same lines, but way wackier: use git/svn blame data to see what percentage of core was last touched by employer. 🙃

    1. Chuck Grimmett Avatar

      I forgot about the credits API 🤦‍♂️

      Jean-Baptiste Audras’s posts are great. Thanks for sharing!

  4. Jonathan Bossenger Avatar

    WordPress Design & Development Around the Web

    Here’s a glimpse of what’s going on in the world of design and development in the WordPress space this past week.

    A new way to keep up with that fast-moving project we all rely on, PHP. • Making wordpress/wordpress-develop usable in GitHub Codespaces. • Help count WordPress contributors and sponsors • Directory Serve is our cool tool of the week — a way to serve files to and from your phone.

    Estimated reading time: 3 minutes

    Keeping up with PHP

    JetBrains, the company behind a suite of developers tools, including the popular PhpStorm and WebStorm, recently launched PHP Annotated — a channel on YouTube.

    The channel’s creator Brent Roose is a well-known PHP blogger and PHP core contributor. Brent previously worked at Spatie and is now a PHP developer advocate at JetBrains, so it makes sense that his employer would want to use his existing YouTube channel and followers.

    As before, the channel is focused on engaging with the PHP community. The only difference is that now Brent will be able to offer far more (and better) content. His first episode under the new brand is What’s New in PHP 8.2.

    Developing WordPress in GitHub Codespaces

    GitHub announced on Twitter that GitHub Codespaces is now widely available for everyone, with access to 60 hours free every month. Codespaces is a full-featured development environment that’s hosted in the cloud, with both the filesystem and code editor working inside your browser.

    WordPress lead developer Helen Hou-Sandí, who now works at GitHub (albeit in a different department than Codespaces) sees the value in this for first-time contributors to WordPress. In a post on the Make WordPress blog, she announced her plans to make the wordpress-develop GitHub repository usable in GitHub Codespaces. This could pave the way for a much smoother experience for first-time contributors and set an example that other open-source projects could follow.

    Counting sponsored contributors

    A while back, I was really pleased to share how Chuck Grimmet (Automattic) has been building a spreadsheet with more granular data on WordPress core contributors. Who their sponsors are (which changes) and whether they’re sponsored or not (which also changes) is hard to keep up with. You can help backfill the data on past releases — just get in touch with Chuck.

    For the 6.1 release, Chuck just dropped the following numbers in Post Status Slack: 149 contributors were sponsored (18.7%) with Automattic ranking as the top sponsor for 63 contributors (42.28%) followed by WPDeveloper (11/7.38%), Yoast (8/5.37%), GoDaddy (6/4.03%), Awsm Innovations (6/4.03%), XWP (5/3.36%), Multidots (5/3.36%), and Extendify (5/3.36%). [DK]

    Cool Tool

    Each week we feature one cool tool that can help make your life easier as a WordPress builder.

    Directory Serve

    Directory Serve is a Node.js CLI tool that allows you to serve a directory on your local computer with file upload/download support. It’s perfect if you need a way to quickly share some files to your mobile devices or move them from the mobile devices to your computer. While most folks in the Apple ecosystem probably don’t need this, it’s great for those using Android mobile devices, or Windows/Linux desktops. It could also pave the way for a smoother experience in local mobile testing for web developers. (And who knows, you could also use it to prove to young people that files and folders actually still do exist.) Get it on GitHub→

    Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)

  5. Dan Knauss Avatar

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