It's a web app - the Mac app is only an Electron wrapper.
It works well on Windows/Mac/Linux/iOS/Android in the browser (I would know, I use it on all of those personally).
Self hosted would certainly be nice - I use their 'Export All' feature to keep a copy of my spaces for myself.
Incidentally I got lazy a while back and my very basic homepage (https://tekacs.com/) on the web is actually a redirect to a page on Notion (yes it requires JavaScript and doesn't SEO well, but amusingly I can update it in realtime whilst you're looking at it ;P)
Oh, I see. I couldn't tell from their homepage that it was actually a web app, with the Mac download link and all screenshots looking like a Mac application.
Andrea from Notion here. We do have one-click export to markdown, but not an automatic backup function. We get requests for that sometimes though, so we'd consider it. :)
We've been building Notion for 2 years and have a great backing team who truly believe in our vision:
I want to like Notion. It's great in theory but it's not ready yet, at least for me. It does a lot which is awesome but doesn't seem to do any of those things great. I love all the different formats of things it supports / handles though.
I need something that is easy to use on mobile.
If it's supposed to replace my bookmark tool I need to be able to add a bookmark with one click and categorize it etc. Same with my todo list and general notes.
I'm not sure whether you mean importing files from Dropbox/GDrive to Notion or vice versa! Neither is possible, as far as I'm aware.
You /can/ have it grab a file from a link - if you can get the raw file link from Dropbox (maybe the share link?), you can import files that way.
They seem to be adding features at a very high clip, so it's also possible to just ask them and it wouldn't surprise me if they added it within a few weeks.
Dropbox Paper was a flop for me - this is /several orders of magnitude/ more flexible.
Note how many products I mentioned it replacing - I maintained a MediaWiki instance of my own for /years/ and dropped it alongside half a dozen other tools because I didn't need them when using Notion.
- To do lists (prev. Org mode, OmniFocus, Things, many others)
- Bookmark lists (prev. raindrop.io, Pinboard, others)
- Kanban boards (prev. GitLab, Trello, others)
- Wikis (prev. MediaWiki, Confluence, TiddlyWiki, etc.)
- General notes (prev. my own tool, OneNote, Evernote, Simplenote, many others)
- Photos (I share using Notion and use Google Photos)
- Files (I share using Notion, but still use many services for this, including S3, Dropbox, GDrive, ...)