VOL. XV Builder. Investor. Web obsessive. WIJCHEN, NL

Joost de Valk

Internet entrepreneur from the Netherlands. Founder of Yoast — the WordPress SEO plugin. These days I invest in and build digital companies through Emilia Capital, and I'm working on Progress Planner and Rondo.

This blog is where I think out loud about the open web, content management, AI's effect on publishing, and the craft of shipping software that people actually use.

Read the latest article → RSS / Atom feed

fig. 1 — the author, Aquilea, 2026

№ 78 FEATURED ARTICLE 2026·04·24 · 29 min

The agency case for open source

Open source spent thirty years winning an argument about cost. AI is about to make that argument irrelevant. Whether open source can win the argument that replaces it (about agency) is an open question. The point of this post is to be honest about why.

Open Source · AI

Continue reading →

Recent articles

80 articles · indexed by date

80 2026·05·06 SEO The missing guide to SEO domain migrations 23 min 79 2026·05·04 Development What agent-ready looks like for a static blog 12 min 78 2026·04·24 Open Source The agency case for open source 29 min 77 2026·04·22 Development Dropping Astro's ClientRouter for web standards 6 min 76 2026·04·14 Development How I made my skills update themselves 3 min 75 2026·04·13 SEO Standards don't prove themselves 7 min

See all 80 articles in the Archive →