WordPress
Best for
The largest CMS ecosystem — massive plugin library, REST API for headless use, and the widest hosting options
Limitations
PHP-based architecture; REST API is verbose and less modern than headless-native alternatives; security requires ongoing maintenance; performance depends heavily on hosting and plugins
Features
Frameworks
SDK Languages
Compliance
WordPress
WordPress powers over 40% of the web. For AI agent developers, its relevance is the REST API — WordPress can be used as a headless CMS, exposing content via a standard JSON API that agents can read from and write to.
The ecosystem advantage is unmatched: thousands of plugins, widespread hosting support, and a developer community larger than any alternative. The tradeoff is that WordPress wasn't designed as a headless CMS, so the API can feel bolted-on compared to purpose-built alternatives like Sanity or Payload.