When comparing hackmd.io vs StackEdit, the Slant community recommends hackmd.io for most people. In the question“What are the best cross-platform writing apps?” hackmd.io is ranked 10th while StackEdit is ranked 11th. The most important reason people chose hackmd.io is:
Allows multiple people to edit the same note in realtime.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Collaborative
Allows multiple people to edit the same note in realtime.
Pro Automatic "table of content"
Automatically generates a "table of content" of your headlines.
Pro Supports revisions
Allows you to go back in time to a previous version of your document.
Pro Edit and view-only permission settings
Note: Enterprise Edition has even more refined permissions, but the permissions in the non-enterprise edition are pretty powerful.
Pro Shortcuts from Sublime Text, Emacs, and Vim
Pro Tag support
This is truly helpful for organizing your documents.
Pro Can create slide-shows
Supports creating slide-shows in markdown.
Pro Online
It's multi-platform (works well on smartphones) and there is no need to install anything.
Pro Math support
Use LaTeX seamlessly within the editor.
Pro Dark and white theme
Perfect for working at night.
Pro Lightweight
Pro Book mode view
This is really helpful for longer documents. Or even "books." This is also super helpful for journaling activities and the like.
Pro Available as a web service
HackMD service can be downloaded and installed in custom servers.
Pro Cross platform
Is available as desktop app.
Pro Dropbox import and export
Pro Extended markdown syntax
Adds supports for embeddings from Youtube, Vimeo, Speakerdeck, GitHub gist etc; and even creating UML diagrams, Graphviz graphs, Timing charts, and even Music notes! and alerts and comments boxes and emojis.
Pro Open source
HackMD Core's source is available on GitHub.
Pro Free
You can subscribe to it for more features.
Pro Github Gist import and export
People who subscribe can push and pull unlimited.
Pro Google Drive import and export
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.
Cons
Con Custom grammar and spell checker
It does not work well in French (and probably other languages).
Con Not as beautiful as StackEdit
Con Cannot organize notes
Doesn't have the ability to organize notes or create notebooks.
Con Slow servers / problem with online / offline switching
Servers can be slow / down for a few seconds preventing from working on the documents currently being edited.
Con No PDF export support
Con Tries to be smart
It guesses what you want to do and tries to help, often in a wrong and annoying way, for example it when working with list items. Ironically Markdown was built to solve those problems (you format yourself with simple codes and it just works).
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.