I use a Kobo Libre 2 with Calibre Web to sync.
I just use Kindle for my calibre/calibre-web stack, all within the KOReader app)
Not the answer you’re looking for, but I have a self-hosted Calibre server and I stuck to a second hand Kindle I got. It would be neat to be able to browse my remote library like on the Kobo, but I’d rather buy what’s second-hand, cheap and readily available (lots of these perfectly working pre-loved Kindles and Kobos). Transfer lots of books at once and I rarely have to do it since I read slowly. If you use it for magazines/news/comics, then other more libre and open recommendations seem quite good.
I run Koreader on a Kobo Libra 2. I just connect to my OPDS catalogue on my Calibre-Web instance. It’s not exactly a sync setup; it just gives me access to my library whenever I need to download something, and that covers my needs. There are several other sync options; check out Koreader’s features here: https://github.com/koreader/koreader/wiki
If you like it and decide you want to it, go through the list of supported devices and see what sort of sync capabilities are available for them (support for Kobo devices seems to be the best/have the most options).
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I have a Kobo Libre and with KoboCloud[1] it syncs automatically with Nextcloud and other cloud providers. It’s awesome.
Onyx Boox Leaf 2, and use the OPDS feature of calibre(web) to download books and read them, all within the KOReader app
There’s this company, which makes ebook readers that don’t seem to be tied to any particular vendor:
https://shop.boox.com/collections/all
They have so many models, though, that I have no idea where to start with them.
I have the Leaf 2 and like it a lot. Can be a little slow sometimes, but nothing worse than any other ereader I’ve used.
Check out the Onyx Boox which might cost a bit more but run a version of Android.
selfhosted ebook library
Is that what we call hard drives, now? :P
I have two android tablets, one 7" to read small books, and one 13" to read US Letter format books, I took the cheapest ones I found, disabled Google Play and installed F-Droid to install FOSS readers, and it just works perfectly. You really don’t need anything specific to just read text, you just want to make sure that you can display an entire page on your screen in a size you’re comfortable reading, otherwise PDFs becomes quickly insufferable.
