WordPress runs a huge share of the web, and for a long time it was the obvious default for agencies. In 2026, more and more agencies are quietly moving their client portfolios off it. Not because WordPress cannot build a site, but because maintaining dozens of them has become a tax on the business.
The plugin tax
Every WordPress client site is a small pile of plugins, and every plugin is a moving part that can break, conflict, or go unmaintained. Multiply that across a portfolio and a real cost appears: hours every month spent updating, testing, and un-breaking sites that were supposed to be done.
A static site has no plugins and no database to maintain, so the monthly upkeep that scales with your client count mostly disappears.
The security treadmill
Plugin vulnerabilities are the most common way small-business sites get compromised. On WordPress, staying safe means staying on top of patches across every site, forever. A static site has almost no attack surface: no database, no plugin runtime, nothing to inject into. The safest site is the one with the least to exploit.
Speed: static beats database-driven
WordPress builds pages from a database on every request, then leans on caching plugins to hide it. Static sites are just clean HTML on a CDN, so they pass Core Web Vitals by default. Faster pages help rankings and conversions, and you do not have to babysit a caching stack to get there.
That is the model behind Seedly Sites hosting and performance: every client site ships as static HTML to the edge, green on Core Web Vitals out of the box.
The fastest, safest, lowest-maintenance site is the one with no database and no plugins to keep alive.
Migration without starting over
The reason agencies stayed on WordPress this long is switching cost. Rebuilding a client portfolio by hand is a non-starter. That is the part that has changed: a real migration pipeline can port an existing site into the builder with a content-parity gate, remap internal links, and bring the media along, so you move clients over without rebuilding from scratch.
What they are moving to
Agencies are not leaving WordPress for another rented platform with the same lock-in. They are moving to something they own: a self-hosted, white-label builder that outputs clean static sites with no plugin tax, no security treadmill, and no per-site fees. See how it stacks up in the Seedly Sites vs WordPress comparison, or try it live.