Haha, thank you! (I am the author)

But it opens instantly! And zz to close

Not as "instant" as dmenu, the searching is kinda awkward and not emoji-aware, and you can't use it in pipes.

I am open for suggestions on how to make the search work better.

Ctrl-p like functionality wouldn't be too difficult... But I see your point

Yeah, you can do a lot with it. One of the (unstated) ideas behind uni is that it can work as a backend for a lot of different integrations: dmenu, Vim, fzf, Emacs, a more domain-specific emoji picker GUI, etc.

Other than this, the feature set is roughly similar. The biggest difference is that uni knows how to deal with emoji sequences.