Nextcloud ist a self hosted cloud service software and has a app for rss-subscriptions: GitHub - nextcloud/news: đź“° RSS/Atom feed reader.
It would be soo cool, if NetNewsWire could sync with this service. I love NetNewsWire. But I love to keep my data private a little bit more. So I deleted my feedly account and use nextcloud news now. Unfortunately this forced me to change my feedreader, too. I want to come back, please 
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If privacy is a concern, you can use freshrss. Works great with nnw.
Go even further more: use fulltext rss by fivefilter
NextCloud isn’t an RSS-specific syncing system in the way FreshRSS, Feedbin, Feedly, and others are, which makes it much more challenging to work with — it’s more like working with iCloud, which doesn’t work nearly as well as the RSS-specific systems.
We may get around to considering this in the future, but for now our focus is on improving our support for the existing systems (fixing bugs, maybe even adopting some system-specific features).
For people who want a self-hosted option, I recommend — agreeing with @Axel — that FreshRSS is a great choice.
That’s a misunderstanding. Nextcloud itself is simply a cloud storage system. However, it can be expanded with apps. The Nextcloud News app ( GitHub - nextcloud/news: 📰 RSS/Atom feed reader ) is an RSS feed aggregator that supports the REST API.
Here is a list of RSS clients that work with the app: Clients - Nextcloud News App . None of them come close to NetNewsWire.
I don’t run my own server on which I could install software, but instead rent space on a managed Nextcloud system and am therefore dependent on this system. Nextcloud is becoming increasingly important in Europe due to the discussion surrounding digital sovereignty. For example, the German federal administration uses Nextcloud for their cloud store system.
Ah! I didn’t realize that there was an actual Nextcloud RSS reader to sync with. That certainly changes things. Thanks for the info!
Hey @brent,
I thought I’d add my two cents, for what it’s worth here to provide some context. IMHO providing integration with the NextCloud NewsApp/ Nextcloud Ecosystem would be a HUGE boost for the NetNewsWire brand/community.
The Nextcloud community is HUGE internationally. It ranges from enterprise large scale solutions, to homelab guys that are self-hosting “instances” to tinker with.
They already have OPML import/export features, and their API for integration is really stellar, and intended for both super strong security and third party app/devs to connect and integrate with their system.
I’ve been an unpaid salesman for NetNewsWire since it’s infancy, and knowing both realms I think that there would be a huge benefit if this request from @spiro was integrated in future versions/updates of NetNews Wire.
In otherwords, I second the motion! LOL!
Thanks in advance to you and the team for the consideration of this. I really look forward to seeing what can be cooked up with connection features between the platform and the NetNewsWire software suite.
Keep us posted!
This is tracked as a feature request on the bug tracker here: https://github.com/Ranchero-Software/NetNewsWire/issues/2247
Subscribed to that github issue, but this this is probably a better place to clutter with visible upvotes and keep the thread alive. 
I’ve looked at the install instructions for FreshRSS several times over the years and every time i lose some of my will to live. Meanwhile I had a Nextcloud server already sitting right there, so in the end I took about a minute to install the news app and import the OPML so I could read and sync news on my linux desktops (Newsflash), which I’m using more these days, as well as my apple devices…
but on the apple devices I’m reduced to using Fiery Feeds and… please, rescue me! NNW has spoiled me rotten! I find I’m doing the opposite of what I was doing before and putting off my news catch-up until I’m on Linux.
(Fiery Feeds isn’t that bad really, but the combination of UI bugs and an ever present nag to upgrade to the pro version (if there was any newsreader i would do that for…) isn’t conducive to kind regard. But at the moment its Nextcloud News support is a killer feature.)
Just so everyone knows — you don’t need to add to this thread or to a GitHub issues thread to keep a bug report or feature request alive!
I prioritize what-to-do-next based on a number of factors. Bugs tend to be highest priority (quality matters!). Feature requests that benefit the most number of existing users tend to be next priority. Etc.
There’s also room in my calculations for considerations like “how much time will this feature take?” and “what is the theme, if any, of this release?” and “what has to happen first before this other thing can happen?” and also “what am I interested in working on right now?" And, also, I can change my mind about a thing at any time.
I’m aware of all of the (currently 559!) feature requests on our bug tracker and I won’t lose or forget any of them. But when I get to any single one is a matter of a bunch of different factors and not how often I’m reminded that people want it.
In other words — I know people want it! Don’t worry! 
PS Here’s the list of open feature requests: