As far as I understand it, the language came first and in order to teach it to others the founder created a screencasting tool of sorts, which became a company in its own right: https://scrimba.com

Ironically, it seems the company focused on content to teach primarily other technologies while using Imba to build it all. It's a rather fascinating story actually, which I'm paraphrasing and probably mostly got wrong, but if you're interested you can read more on their hiring page: https://scrimba.recruitee.com

N.B.: I'm not in any way affiliated with Imba or Scrimba. The first time I heard of the technology and the company was today, through HN, so I have no skin in this game. I'm probably also mostly wrong about everything above, so you know..

They funded https://scrimba.com, an interactive coding tutorial platform, that is written in Imba.

Scrimba