When comparing iClip vs CopyQ, the Slant community recommends CopyQ for most people. In the question“What are the best clipboard managers for Mac?” CopyQ is ranked 8th while iClip is ranked 14th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Easy to use
Pro Stays out of the way when you don't need it
Pro Highly customizable
Freely settable hotkeys, many options for positioning, when to make it appear, and how to handle specific applications. AppleScript is a plus, too.
Pro Scriptable (AppleScript)
Pro Simple to setup
Pro Easy to use
Pro Free
Pro Add notes or tags to items
Most effective with stacks that don't automatically delete the oldest members, tags and notes allow you to use CopyQ as a personal database for important information with easy access and retrieval.
Pro Cross-platform and cross-DE
CopyQ supports all major Linux desktop environments (including KDE Plasma, GNOME, Xfce, etc.), Windows and MacOS X 10.9+.
Pro Can sort and store based on content type
Built-in support for text, HTML, images or any other custom formats, allowing for type-based clip stacks that each have their own custom actions (open images in a photo editor, open URLs in a browser, etc.)
Pro Browse and filter items in history
Quickly locate that snippet you copied months ago but don't recall precisely what it was.
Cons
Con impossible to quit/start copyq via script
Con In linux, it sometimes does not react to shortcuts
Also buggy when hiding.
Con Sometimes copies filtered entries in between selection
Con Can't export images in bulk
Con Slow with many entries
Con Slow to place selected content on editor
Takes a while to place the selected text into the editor.