Weirdly I know about this category of software from a prior life working at a major CMS company. So, "digital asset managers" (DAMs) are basically fancy versions of the WordPress media library: https://wordpress.org/documentation/article/media-library-sc... Why might a fancy version be needed? Well, the basic media library bundled with WordPress just uploads files directly into a web server directory, and then serves…
It's funny that you mention WordPress, because that's one of the main reasons why we developed Daminik. Many of our customers use WordPress, most of them are from the publishing industry. All of them use some kind of DAM, either a local one or one in the cloud. Some of the tools also provide a WordPress plugin. However, what all of these tools currently do is copy the assets into the WordPress media library instead of taking the URL/File from the DAM/CDN. This creates a lot of duplicates that nobody can maintain.
One of the most important things on our roadmap is the development of a WordPress plugin to fix this problem. Will be ready soon.