When comparing Quiver vs Notebooks, the Slant community recommends Notebooks for most people. In the question“What are the best Evernote alternatives?” Notebooks is ranked 30th while Quiver is ranked 34th. The most important reason people chose Notebooks is:
Services like Paper (Dropbox), Evernote, Google, OneNote (Microsoft)... and many others, keep your data in format they can read when it syncs with their servers. That means their admins can read your data (see recent scandal with Evernote privacy policy), they can be compelled to give it to law-enforcement and, if hackers manage to breach their servers, the hackers can read it too. With Notebooks, you choose how to sync your data, which means that you can do it using a privacy-friendly service, such as SpiderOak, Tresorit, Sync.com or iDrive, which sync your data using end-to-end encryption. This means that although they use their servers to sync your data, their servers store an encrypted version to which the service does not hold the key. Your data stays private.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Has more features than just a simple Markdown editor
Quiver is a notebook and note-taking app akin to Evernote which happens to also be able to edit Markdown files. As such, it has a lot of useful features such as: image support, file attachments, web content support and more.
Pro Supports code highlighting
Has syntax highlighting for more than 120 programming languages.
Pro Notes can be linked to each-other
Quiver notes have unique links that can be copied and pasted into other notes to gain quick access between them.
Pro Live preview
Quiver has live preview for both Markdown and LaTeX. This helps users to better understand the way they are formatting their files.
Pro Cloud syncing
Dropbox, iCloud Drive, Google Drive, or any other file-based cloud services.

Pro Supports vi keybindings
For people used to vi keybindings, Quiver can be set up to work with them.
Pro Combination of different types of writing in one note
The most outstanding thing for me. Use HTML line breaks while writing MD text.
Also, unlike most hybrid editors like Bear, it supports instant image sizing and respective preview.
Pro You control how to sync the data - better privacy
Services like Paper (Dropbox), Evernote, Google, OneNote (Microsoft)... and many others, keep your data in format they can read when it syncs with their servers. That means their admins can read your data (see recent scandal with Evernote privacy policy), they can be compelled to give it to law-enforcement and, if hackers manage to breach their servers, the hackers can read it too.
With Notebooks, you choose how to sync your data, which means that you can do it using a privacy-friendly service, such as SpiderOak, Tresorit, Sync.com or iDrive, which sync your data using end-to-end encryption. This means that although they use their servers to sync your data, their servers store an encrypted version to which the service does not hold the key. Your data stays private.
Pro Powerful and grows according to your needs
Notebooks have many features including WYSIWYG editing and Markdown support. While these may be considered power-user features, they are there if the user ever needs them. This makes the app versatile, as it can appeal to the user who just wants to take notes just as much as the user who needs to edit complicated documents.
Pro No recurring fees
There are no reoccurring fees connected to this app: pay once for the platform you would like to use it on, and that's it.
Pro Available on multiple platforms
As an Evernote alternative, Notebooks is available on iOS as well as OS X and Windows operating systems. This makes for a convenient way to manage one's notes or tasks on multiple devices
Cons
Con You can't edit specific files, they must be in your notebook
Con No iOS apps for editing, only a viewer available
I'd LOVE to edit and create quiver notes on my iPad!
Con The line in focus shows a border around it which is distracting
The line in focus in the editor shows a rounded rectangular border around it, which is unappealing and distracting.
Con Much more than a simple Markdown editor
Since it's more like a note-taking app (and a note-taking app built for developers) than a Markdown editor, it may be a little excessive to use it only for its Markdown editing features.
Con No Linux support
Not able to install on any Linux-based OS.
Con Each platform app has an individual cost
Say if you want to use the desktop app on OSX, that will have an individual cost. This cost does not carry over if the Windows app needs to be used as that has its own cost as well. Basically you have to pay for each platform you want to use this app on. While there are no recurring fees, the individual cost for each platform can add up.
Con Cloud sharing has to be done with a third party
Notebooks does not provide its own synchronizing and back-up. The user will therefore need to use a service (such as Dropbox) which has built-in support, but which is a service not connected with the creators of this app.
