When comparing StackEdit vs Google Drive, the Slant community recommends StackEdit for most people. In the question“What is the best cross-platform note-taking app?” StackEdit is ranked 28th while Google Drive is ranked 39th. The most important reason people chose StackEdit is:
StackEdit works within your browser. You need internet access to connect to the website, but once it's loaded, the site does not require an internet connection - you will be able to edit and save files locally. Additionally, you can use [Fluid](http://fluidapp.com) to turn it into a native desktop application.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works online and offline
StackEdit works within your browser. You need internet access to connect to the website, but once it's loaded, the site does not require an internet connection - you will be able to edit and save files locally. Additionally, you can use Fluid to turn it into a native desktop application.
Pro Supports various Markdown flavors
Supports standard Markdown and Markdown Extra.

Pro Simple workflow
It is very easy to toggle between the preview and the editing windows. The black makes it a very focused writing environment. Of course it's possible to change that if needed.

Pro Great when in full-screen
Pro No need to install additional software
StackEdit works directly from the browser, there's no need to install additional software as long as you have a web browser installed on your computer.
Pro Real-time preview
The preview shows in a collapsible pane on the right hand side.
Pro Instant publishing
StackEdit allows pushing a document directly to a list of publishing or file storage platforms or any SSH server.
Pro Multiple export options
Can export to .txt, .html and .pdf.
Pro Syncs via Dropbox and Drive
Files can be synchronized through Dropbox and Drive.
Pro File sharing & collaborative editing
Google account holders and non-holders can be set to access and/or collaborate on files/folders in real-time. Additionally, you can find files you've shared not only by filename but by person you've shared the files with.
Pro 15GB free
This space is shared across Drive, Gmail & Google Photos.
Pro Built-in office suite
Includes tools for writing, presentations and spreadsheets.
Pro Integrates with other Google services
For example, you can use search to search through both Drive and Gmail.
Pro Extended functionality via apps
Third party Drive applications running in Chrome or Android can add functionality such as image/video editing, project management, flowchart creation, etc.
Pro Mobile integration
You can work from any device, especially mobile.
Pro Save files to drive directly from Gmail
Drive lets you save any file from your email.
Pro Cheap for extra storage
$1.99 per 100GB, for up to 16TB.
Pro Revision control
By clicking Ctrl + Alt + G in Windows or Command + Alt + Shift + G is OS X you can access previous version of the file.
Pro Indexes images
You can search images by object, place, or face when they've been added to your google photos collection. Google Assistant also helps you find screenshots that could be archived, images that aren't in the correct orientation and pictures that would work well as animations or albums.
Cons
Con Saves files in browser's local storage
Local storage is limited and if the browser crashes the text can be lost.
Con Cannot be accessed while being offline
Even though the editor itself works offline, you need internet access to open the website and the editor.
Con Lacks a good integrated spell checker
Uses the built-in browser spell checker which may not be as good as spell checkers other editors have. Depending on the browser, of course.
Con Publishing to GitHub requires giving write access to repos
In order to publish documents to GitHub, StackEdit requires writing access to your repos, something which many people may not be comfortable with.
Con No official client for Linux
Google as of yet has a client for Linux, leaving many who use the service forced to use third party apps or the webpage.
Con Data privacy not guaranteed
Data privacy is widely known as one of Google's weaknesses. Data shared through Google is most likely matched up with the user's profile inside other Alphabet inc. subsidiaries, and, due to the business model, used commercially.
Con Terms and Conditions allow Google to own anything on Google Drive
They can create derivative works, they can perform it, they can modify it, and they can publish it at will. There are many other specific rights they take over your product. Read the Terms carefully and compare with ANY others.
Con Very unreliable
Desktop client constantly crashes.
Con No WebDAV, FTP or SFTP
It supports none of these common protocols used for access to network storage, which severely limits OS integration. You are forced to use the browser or a standalone client, which isn't possible on all systems.
Con Low bandwidth
Can't even upload all my files to this
Con Low sync speed
Con No universal Windows app
Con Doesn't integrate well with OS
