You actually need a domain expert, or to become one yourself, within some field to even begin to know what the current issues faced are, what technologies or products are already in use, and what kind of solution would be acceptable in the market. The balance then of finding the solution is actually much more 50/50 than a lot of tech people want to believe - its not just them sailing down on a cloud and delivering some perfect pre-made solution.
Usually I find these people through my friends or family. You basically have to sit down and interview them, and have a back and forth to find what kind of things would or wouldn't work in their industries. I don't think theres some magic bullet to finding all untapped markets.
Two niches I encountered, independent music schools, garden centres/nurseries.
So you're not going to bring a flourish just by bringing tech, they already have it. But can it be done better? Hell yes.
Can you make a business model out of doing it better?
...I don't know. In my country, that's a lot of start-ups that target agriculture, and deliver some good results, but then find out that farmers are risk adverse when it comes to new spending.
An old colleague developed fantastic software for managing hives, and then found that the beta testing apiarists who loved his software were even more risk adverse than farmers.
But yeah, if you want to target a niche, you need a partner who not only knows the problem domain, but the market/social network, and has good relationships, as sales will initially be word of mouth.
Example, my partner is a nurse, but works in an office capacity. We've co-developed a suite of tools that make her job so much easier/faster. These tools could probably justify a $100k per annual seat and a small client might buy 20 seats. Yet, we can't really productionize it and sell it because healthcare is basically impenetrable.
So if your goal is to sell a product, think through sales and marketing before diving into the code.
- customer support
- health/beauty/nutrition advice
- "content creation" ie blog post SEO spam
- tax/legal
- digitizing, managing, filing out paperwork
- supermarket cashiers
- government bureocracy of any kind
I don't use the self-checkouts anymore since they installed cameras on the screens at some of the supermarkets in my area. I don't care about normal CCTV in ceiling. But when the camera is 30cm from my face as I pack bags, it's literally a mechanical eye replacing the human eye of the cashier.