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SECTION IIABOUT ME · WIJCHEN, NL

Hi! I'm Joost de Valk

I'm an internet entrepreneur from the Netherlands. I'm married to Marieke; we have four children and live in Wijchen, the Netherlands.

Today I'm Group Head of AI & Growth at Your.Online, leading a team that builds AI tools to help entrepreneurs get online and grow. Before that I founded Yoast and its SEO plugin for WordPress, and I have a long history in open source and digital marketing.

Joost de Valk
Portrait · Aquilea, 2026
§ 01 · Background

My story.

My story starts with a loan. When I was 12, I borrowed money from my parents to buy a computer, and I was building websites soon after. I began blogging in 2004 and ran css3.info, one of the first sites tracking the CSS3 standard as browsers started to support it. Alongside that, I consulted for companies like eBay, Disney and Meta, and on some of the biggest SEO projects in the world, like the Guardian's site migration from .co.uk to theguardian.com. I founded Yoast as a company in 2010. Its SEO plugin for WordPress now runs on more than 15 million websites.

I wore a few different hats there. For almost 9 years I was the CEO, then I became Chief Product Officer when my wife Marieke took over as CEO. We sold Yoast to Newfold Digital in August of 2021, after which I became Head of WordPress Strategy at Newfold for a while. I then came back for a 6-month stint as Yoast's interim CTO (because they were suddenly without one) in 2022-2023. I finally left the company in April 2023.

Marieke and I started investing in other companies in 2020. In 2023, after we left Yoast, we gave that work a name: Emilia Capital. We invest in companies that play at least partly in the digital space (and often in WordPress). Because of that, I'm on the board of Patchstack and Atarim, I chair the board of Post Status, and I advise WordProof. We also started our own new company, Progress Planner. In June 2026, Progress Planner and our whole team joined Your.Online, a hosting group with strong European roots. I'm now Group Head of AI & Growth there, and Marieke is Group Head of Brand & Community.

In my spare time, I can often be found coaching kids' soccer at AWC, where I'm also a board member. On holidays, Marieke and I love spending time in our holiday home in Tuscany or traveling to other places in the world.

§ 02 · Open source

WordPress, and beyond.

I've been part of the WordPress community for most of my career. I've contributed to WordPress core, built and maintained free plugins, and spoken at WordCamps around the world.

In 2019, I became WordPress's marketing & communications lead. Six months later, I stepped down: the role didn't come with the say in the project's direction that leading its marketing needs.

In 2025, together with Karim Marucchi and well over a hundred other people, I worked on FAIR, a neutral, community-governed package manager for WordPress under the Linux Foundation. It became a working technical alternative, but the big hosting companies weren't willing to invest in it. In early 2026, we stopped pushing it for WordPress.

I still write a lot about where WordPress is heading, about open source governance, and about the CMS market as a whole, including my own CMS market share research. These days I also build for EmDash, Cloudflare's new CMS, and for Astro, which this site runs on; you'll find my plugins and packages for both on my code page.

I also built specification.website, a platform-agnostic specification of what every good website should do, backed by the standards behind it.

§ 03 · On stage

Recent speaking engagements.

Booking me to speak?

I've spoken at WordCamp Europe, WordCamp US, CloudFest, Open Source Summit North America, T3CON and YoastCon, among others. To book me, get in touch. Feel free to use the bios below and my headshot (1000×1100, the photo at the top of this page).

Short bio

Joost de Valk is an internet entrepreneur from the Netherlands. He founded Yoast, whose SEO plugin runs on more than 15 million websites, and is now Group Head of AI & Growth at Your.Online.

Long bio

Joost de Valk is an internet entrepreneur from Wijchen, the Netherlands. He started blogging in 2004, consulted on SEO for companies like eBay, Disney, Meta and the Guardian, and founded Yoast in 2010. Its SEO plugin for WordPress runs on more than 15 million websites. After Yoast was sold to Newfold Digital in 2021, Joost and his wife Marieke invested in digital companies through Emilia Capital and founded Progress Planner, which joined Your.Online in 2026. He is now Group Head of AI & Growth at Your.Online. He sits on the boards of Patchstack and Atarim, chairs the board of Post Status, and is a long-time WordPress core contributor and open source advocate.

§ 04 · Principles

How I write.

Everything on this site is my own opinion. It isn't the official position of Your.Online or of any company I invest in or advise.

I have a stake in a lot of what I write about. I work at Your.Online, invest through Emilia Capital, and sit on several boards. When a post touches a company I'm tied to, I say so in the post.

I use AI tools, including Claude, ChatGPT and Muse, for research, editing, and code. The arguments and opinions are mine, and I read and approve every word before it's published.

When I get something wrong, I correct it and say what changed.

§ 05 · Ask me

Ask, don't search.

Don't want to read 20 years of posts to find an answer? Ask Joost answers questions based on what I've written here, with links to the posts it used.

AI agents can do the same through my MCP server at https://joost.blog/mcp. Add it to Claude, Cursor or any other MCP client to ask questions about my writing and get my latest posts.

§ 06 · Connect

Find me online.

§ 07 · Code

What I build.

From WordPress plugins to SaaS products, I'm always working on something. See all my current projects on my code page.

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