[dann0]

I like Joplin. Has the features you've asked for

[bigbaldhead]

synchronization isn't good for me, it must be cloud, not via third-party software.

[guizadillas]

all cloud is third party if you are not selfhosting

[dann0]

I sync it with my own synology.

[Tomte]

Joplin can sync using WebDAV.

[aprdm]

you can pay to synchronize w/ their backend, is what I do