Sumo Paint vs Pixla
When comparing Sumo Paint vs Pixla, the Slant community recommends Pixla for most people. In the question“What are the best pixel art / sprite editors?” Pixla is ranked 36th while Sumo Paint is ranked 40th. The most important reason people chose Pixla is:
Considering what you get and in comparison with some competitors, you have to say that this is a pretty inexpensive piece of software. If you use it, you are free to make a donation. Otherwise Pixla is "free".
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Pros
Pro Has most of standard Photoshop filters
Pro Has a Chrome App
Chrome app can be downloaded here.
Pro Has advanced layers support
Pro Can save to cloud, locally, or directly copy to clipboard
Pro "Free"
Considering what you get and in comparison with some competitors, you have to say that this is a pretty inexpensive piece of software. If you use it, you are free to make a donation. Otherwise Pixla is "free".
Pro Easy to use
Clean, uncluttered interface which is a must for a tool like this.
Cons
Con Requires Flash
Con Slow to open
Sumo Paint is pretty slow to open when compared to other online photo editors.
Con Lacks drag and drop support
Doesn't yet support dragging & droping images in to the browser window.
Con Cannot zoom using mouse wheel
Con GUI
The style of the GUI might seem a little outdated, but that is a matter of personal taste more than anything.