Symfony Finland Random things on PHP, Symfony and web development
WordPress, Drupal and eZ Publish Data and Content Migrations
You can transfer content automatically from WordPress to Drupal to eZ Publish (nowadays eZ Platform). To help you get started with your automatic content migrations from WordPress to eZ Platform or Drupal, you'll want to hire skilled partners to do this for you.
Make sure to hire professionals who know both systems - the target and the source. Otherwise you might loose risking history data with crude migration methods and possibly search engine rankings on Google, Bing, etc. due to improper use of redirects and Canonical URLs.
Or simply running out of budget or missing an important deadline. An experienced vendor will reuse intermediary migration formats like WordPress eXtended Rss (WXR). An example of a WXR importer for Bolt CMS - in this case it makes trivial to transfer content into the CMS from WordPress.
Professionals with experience from Content Migrations also know to why and how to use CMS APIs in content instead of raw database queries that might lead to unexpected issues later on in the development and deployment process.