When comparing MWeb vs Bear, the Slant community recommends Bear for most people. In the question“What are the best Markdown editors for OS X?” Bear is ranked 13th while MWeb is ranked 17th.
Ranked in these QuestionsQuestion Ranking
Pro Excellent support of LaTeX equations
Math-heavy note takers, look no further. Mweb even supports the basic LaTeX equation labeling and referencing, which you cannot find in any other markdown editor as of early 2018. Library management is another major plus.
Quick insert and editing of tables.
Pro Comes with an iOS app with iCloud sync
Once you are done editing your note on your mac, it's immediately available in your iOS devices, great for checkup anytime as you go.
Pro Small but powerful
It has file tree, can post article, can upload pictures, can render in pretty preview themes, and is small and fast.
Pro Supports publishing to popular web platforms
MWeb can publish Markdown files to various web platforms including (but not limited to) Wordpress, Metaweblog, Evernote, Blogger and Tumblr.
Pro Syntax highlighting in fenced code blocks
MWeb has syntax highlighting for some popular programming languages inside fenced code blocks.
Pro Supports publishing a static blog on FTP
Possible to manage your self-hosted static blog with your own css
Pro There's a free version, Mweb lite, on Mac OS and iOS
Pro Supports both its own database and external folders
So you can have a side project stored on its database, and your current notes on external folder, with simple files, that could be share with other apps.
Pro Drag & drop or paste photos to the editor and display
Supports adding pictures to a Markdown file either through drag-and-drop or by pasting it.
Pro Easy to use
Pro Flawless sync
It's everything Dropbox Paper promised to be, but without the embarrassment. The notes are always in sync between devices.
Pro Easy tagging
For example: #tag/sub tag/foo/bar #tag2/foo/bar
Pro Beautiful interface
Pro Instant markdown preview in the editor while preserving original MD code
Pro Simple to back up/export entire note database
Notes are exported as plain text, not a proprietary format, along with all embedded objects.
Pro Lots of export formats
PDF, RTF, DOCX, HTML, TXT and MD.
Pro Hashtag support
Adding a hashtag with a keyword tags the note to make it easy to search.
Con Indie app, possible to be abandoned at anytime
If you like the app, please buy it to make it sustainable.
Con No free version
MWeb costs $14.99 and is available on the Mac App Store. There's a free trial available but it's only for 14 days which may not be enough to make a good evaluation of the software before buying.
Con No Tabs - can only view 1 note at a time
Con No inline editing and markup of pictures
The only option is to open in an editor (thereby creating a copy) and saving it again.