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.
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
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82 2026·05·09 Personal stuff Vol. XV: out with the AI slop 4 min 81 2026·05·08 WordPress If WordPress gets CPTs in Core, we also need custom fields 6 min 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
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