Obsidian is free for individual use. The $50/yr is a commercial license.
They also have a $4/month sync product (sync across devices with e2e encryption), but you can use icloud, google drive, etc too.
In Obsidian , you can even sync to github or dropbox with community plugins . so price wise it is free
Also Obsidian has much better search (using community plugin) which is lacking in noteshub
+1 on the third party search. Quick Switcher plugin lets you bring up a hotkeyed modal to search across all note titles/headings/subheadings/tags all in a single fast search interface.
A really interesting feature would be the ability to post to your own host --- the publishing aspect is the one thing which has me seriously contemplating Obsidian, but I'm so deep into gitbook and github I haven't been able to justify a cost-benefit calculation.
The app being the in store for mac and ios, I stopped using obsidian when they removed the app from the mac store and only allowed it for ios.
I need the sandbox, for bussiness is a no brainer, allow some apps from the store, give the right permissions, done and for me personally, I don't use anything that doesn't come from the store, even if I can download the app freely from the project page, a few bucks for the sandbox and peace of mind is worth it to me.
I donated to Obsidian because I liked the project in general, I dislike the way they distribute the app in all platforms outside of ios, ex, snap with --classic rendering the attempt to sandbox it useless.
Edit ---
Reading some comments, it's pretty obvious that a lot of people even install third party plugins, on an app that is about taking personal notes, it's refreshing to see how much people care about cybersecurity and their personal, business notes.
