compared to what?
...to what? ...the Finder icon?
Flattery, move on.
Neither. They may borrow a few interface concepts, but so did Basecamp. Everything's a remix.
We started redesign our application in June. This was a design from July. I guess I can hit ⌘⌫ on it now though.
Are you suggesting this could be plagiarising Slack? That happened a couple of weeks ago with a gaming-focused platform I now can't remember the name of, but it's application UI was very similar to that you see in Slack. I don't think we should reach for the pitchforks just because they're using the "fixed sidebar on the left" design pattern.
Unless I misunderstand and there's something else being ripped off. I dunno. All web design is a little bit derivative of some other website somewhere...
Don't forget MeeGo too
Also dropbox-style illustrations.
Have you heard of dribbble?
And Basecamp's project cards along with the calendar scheduling popout seen at https://labs.activecollab.com/articles/redesigning-active-collab.html.
The fact that this would even remotely appear to be a ripoff or "inspiration" shows imho that there's really to little stylistic variance out there.