Ask HN: Public AI Companies?

There is some amazing development going on in AI at the moment.

But it seems it is all taking place in giant companies that do mostly other stuff. Tesla, Google, Microsoft ...

Tesla is the closest to an "AI company" that I know. As their future value will be greatly impacted by how well they do in the race to self driving cars.

Are there any more "pure" AI companies, that are ideally working on just one AI solution?