The last time I tried to do this, I exhausted everything I could find on the internet and was still very short. I was researching a major professional user software sector and my only option at this point was an annual report sold by a private firm for around $4,000/year. They seemed open to bids but did not accept my extremely low ones. They did keep spamming me for a while, though. I never could tell if this was going to be legitimate. I wasn’t able to find reviews of the firm’s services, and even if I could have afforded it, I expect I would have been too suspicious to follow through.
We do pay end users (IoT and embedded engineers) for their time on surveys and interviews. Drop me an email if you want to be added to our email list. We usually offer a $40 amazon gift card or donation to Doctors Without Borders for a 30 minute survey, and we report feedback on hardware, software, and tools to vendors to help them improve their products.
If looking into existing markets and figuring out your angle into those - firms like Gartner, Forrester, as well as research arms of banks/consulting firms (Deloitte, JPM, BAML, etc) will have pretty good reports that you can purchase/search for (filetype:pdf can give some great results). I find these to be a good high level starting point and you can go deep on individual topics. "Value added research" can involve customer interviews, public surveys, hands on research (visiting a location), etc.
Ideally, the question would have more specifics to warrant a better answer.
