I'm not at all an expert regarding patents and my understanding is that they only apply in very specific/constrained situations, making an overlap with any other situation really unlikely. However, a search for keywords related to what I'm creating results in hundreds of patents with vaguely similar concepts and/or technologies.
The product that I'm developing is indeed based on somewhat advanced and technical AI and NLP stuff, but 90% of it is already described in publicly accessible scientific research articles. All things considered, I'm pretty sure that we're on the safe side here, but my cofounder expressed some concerns about this so I would like to make sure what the best course of action is, also considering that going through hundred of patents is a huge time sink not really a feasible task for a small startup with no revenue.