Of course. This is very risky since they also might have some patents.

If it's just an "addon" or a feature on top of an existing very complex app, I would stay away from it. You would have to reinvent the wheel, build the full scale product, get traction and then try to sell it to them.

Most companies don't buy features, they just rebuild them. Unless you can product it with a patent which is very different right now in the software space.

Let me know if you want to have a call and if you have more questions.