Amplenote isn't especially similar to Onenote. The two share support for several formatting features, and both allow deep hierarchies to be used to organize notes. Amplenote supports more robust security features, note publishing, backlinking, transclusion, and other modern note taking features that Onenote lacks. The biggest reason to switch from Onenote to Amplenote is if you use your note taking app to organize your to-do list. While to-do lists are an afterthought in Onenote, they're central to Amplenote.

Guiding Tech provides a nicely detailed rundown with lots of screenshots at https://www.guidingtech.com/apple-notes-vs-onen....

Their conclusion is that "If you use a Mac, an iPhone and an iPad heavily, then you might be comfortable in Apple's ecosystem with the Apple Notes. However, you should give Microsoft OneNote a shot to experience if you're missing out on something. Especially the capability to store website clips."

Most of the user-review websites place these two apps in pretty similar territory as of late 2020. The biggest advantage of Asana is its team integration and the ability to send tasks to team members.

Guiding Tech offers a comparison of the two at https://www.guidingtech.com/onenote-vs-bear-not.... Their conclusion is "Both OneNote and Bear Notes are excellent note-taking apps. If you want something free and works across all platforms, then go with OneNote. Bear Notes offer better UI, robust organization with tags, and a bunch of theme options to spice up the software experience. As for now, I’m sliding with OneNote..."

There aren't a lot of resources on the internet that directly compare these two apps, since their use case tends to be quite different. Coda is a much different product than Onenote in that it focuses on teams, collaborative writing, and spreadsheets. Onenote is a tool better suited for individual use. The fact that Coda was launched almost 15 years after Onenote is apparently in the design & speed advantages enjoyed by Coda.

This comparison is battle of the two original heavyweights from the first generation note taking apps. ComputerWorld weighs in on how they compare here https://www.computerworld.com/article/2488890/d... In support of Evernote, they repeatedly mention how great its Web Clipper is compared to Onenote.

A great review from late 2020 is available at https://osgav.run/post/onenote-vs-joplin.html. It points out how much more automation-friendly Joplin is, and how the local storage prevents situations where note content can be lost due to Microsoft shenanigans.

Nimbus has created a dedicated page to list out the advantages they hold over Onenote, check it out here https://nimbusweb.me/nimbusnote-vs-onenote.php. As they summarize, "Slowed down by OneNote’s dated, clunky interface? Need more integrations that actually work? Switch to Nimbus!"

NoteJoy has created a page dedicated to listing their advantages over Onenote, you can review it for yourself here https://notejoy.com/onenote-alternative. They summarize by saying "Notejoy is a fast and beautiful way for teams to capture, share, and organize their notes. Unlike OneNote, Notejoy is built to be collaborative from the ground up."

Guiding Tech compares Onenote to Notion here https://www.guidingtech.com/notion-vs-onenote-c.... They state "Notion is positioning itself as a cross between note-taking app (OneNote), to-do lists (Todoist), Kanban (Trello), calendar (Google Calendar) and database management (Airtable) apps. It’s a nice concept. Notion is powerful and suited for power users. That said, security is still not there yet"

Slant.co https://www.slant.co/versus/2130/37045/~microso... (beware the ad payload in Chrome) gives Obsidian higher marks than Onenote in every category they rate. In particular, they call Obsidian "the #1 Personal Knowledge Base" app, whereas Onenote comes in at #11 on that front.

Guiding Tech provides a screenshot-rich comparison of the apps at https://www.guidingtech.com/dropbox-paper-vs-on.... In support of Dropbox Paper, they summarize its advantage saying "If collaborating with peers, think business and enterprise solutions, is your priority and you need something less flashy with third-party app support, go for Dropbox Paper."

Onenote and Roam are about as apples-to-oranges as you can find from two apps. Roam is built to make networked note taking possible, which enables new modes of thought. For users that don't need to create content in a flat note (Roam is implemented exclusively through a hierarchy, like Workflowy), Roam offers modern accouterments Onenote lacks.

SuperNotes themselves tackles the advantages they afford relative to Onenote: https://supernotes.app/alternative-to-onenote. The top factors they mention:
1. Fast, like really fast
2. Easy to learn
3. Collaboration