When comparing ShiftEdit vs PaizaCloud IDE, the Slant community recommends ShiftEdit for most people. In the question“What are the best cloud IDEs?” ShiftEdit is ranked 7th while PaizaCloud IDE is ranked 9th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Low cost, high quality

Pro Revision control
Pro Syntax checking
Highlights syntax errors and automatically fix some errors
Pro Supports multiple file access points
Access files from FTP, SFTP, WebDAV, Dropbox, Google Drive or Amazon S3
Pro Supports autocomplete
Code completion for HTML tags, CSS and PHP code assist
Pro SSH support
Allows connecting directly to a server and run commands on that server.

Pro Good Customer Support
Help requests get answered quickly and successfully.
Pro 3 seconds instant launch
PaizaCloud launches new development environment server just in 3 seconds. So, you can casually create or destroy server.
Pro Floating window manager
PaizaCloud provides Floating window manager like Windows or Mac by default. It makes the environment more flexible. PaizaCloud also provides Tab window mode when you want to use the full screen for one purpose.
Pro HTTP/HTTPS access to any ports
PaizaCloud allow you to access almost all ports for HTTP/HTTPs access.
Pro No credit card required
No credit card is required for FREE plan.
Pro Internationalization
PaizaCloud's Editor or Terminal fully support non-ASCII languages like Japanese, Chinese, European languages.
Pro Extensible PaizaCloud app
PaizaCloud provides standard application like File manager, Editor, Terminal. But, PaizaCloud also provides the possibility to add or even create new App-for-PaizaCloud using HTML/CSS.
Pro Terminal with root
In PaizaCloud, you can sudo to root. So, you can install packages, or run service freely.
Pro Supports Jupyter notebook
PaizaCloud has Jupyter Notebook support with Python libraries like NumPy, SciPy, Pandas, or matplotlib built-in.
Pro Google Home / Google Assistant development in the browser
As PaizaCloud runs in the cloud, you can develop and run the Google Home / Google Assistant application, without deploying to another server.
Cons
Con Expensive
Con Not user friendly
Con Non free/libre (proprietary)
