I switched from Evernote to Joplin a year or two ago, and it has been a great experience. Joplin is much more markdown-centric, so it doesn't fully replace all of Evernote's features, but it does have good support for multiple organizational schemes, including notebooks (i.e., folders) and tags, which I appreciate. They have both mobile and desktop apps, and even a CLI. And it's built to sync over any number of cloud services, including Dropbox, Google Drive, or Nextcloud.

Anyway, I recommend checking it out to see if it meets your use case. It's been a while, but I believe it has the ability to import from Evernote, or at least read from whatever export format Evernote provides, something like that.