When comparing Launchy vs Rofi, the Slant community recommends Rofi for most people. In the question“What are the best Linux app launchers?” Rofi is ranked 1st while Launchy is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pro .deb files available for Debian based distros
For those using Debian based distros Launchy is very easy to install as their website has 32 and 64bit .deb files available. For all other diistros Launchy will have to be compiled from source.
Pro Easily themed with many available on the web
Launchy can be easily themedby placing themes into the Launchy theme folder and then selecting that theme from within the apps settings. There are also many user created themes available which is great for those that want their launcher to match the rest of their OS's theme.
Pro Can run commands
<code>run: st toxic</code> Runs a tox client in the terminal emulator "st".
<code>run: maim ~/Images/screenshots</code> take a screenshot with "maim" and save it to given location.
Pro Great keybindings
They seem to be emacs based.
Pro Case insensitive
Instead of having to worry about case sensitive characters, you can use caps or lowercase wherever you please without causing any issues.
Pro Minimalist design, yet can use customizable themes
Also it's easy to make use of your own "plugin" (scripts).
Pro Clipboard history extension
Greenclip adds clipboard manager functionality: https://github.com/erebe/greenclip
Pro Easily switch windows without mouse
Launchy was last updated in 2010.
Con Small selection of plugins
The official plugin page on Launchy's homepage hosts just 11 plugins.
Con Issues when Caps Lock is active
When typing with Caps Lock activated, it's impossible to use Backspace. Rofi eventually freezes in this scenario.