When comparing Polynote vs Coda, the Slant community recommends Polynote for most people. In the question“What are the best Evernote alternatives?” Polynote is ranked 43rd while Coda is ranked 47th. The most important reason people chose Polynote is:
Multiple users can edit a note simultaneously, in real time.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Real-time collaborative
Multiple users can edit a note simultaneously, in real time.
Pro Minimal interface
The application is simple and fast. Can create, share and organize notes and notebooks on the same page.
Pro Live Preview mode
Makes styling a site in CSS simpler.
Pro Built-in FTP client
Publishing your changes to the web server is a one-click operation. That is, one click per file, or one click for all your changed files. Or even cherry-pick the files to be published in the next batch.
Pro Built-in support for Git and Subversion
Although the software doesn't ship with these libraries, it does work once you have one installed.
Pro Mature
Coda has been developed by Panic exclusively for Mac since 2007. The experience of the developers shows in the stability and polish of their product.
Pro Many plugins available
There is a huge library of user-created plugins, ranging from additional syntax modes, to code validation and beautification, to reference materials, code snippets, text actions and more.
Cons

Con No free tier
Plynote has a 15-day free trial after which it requires a 20$/user/year subscription.
Con Hasn't been updated in 2 years.
Con Expensive
The price of $99 is more than many other editors.
