I have talked to a few people in the industry (a small manufacturing firm, couple of botique software firms) who liked the solution I'm proposing. I started working on it the start of this year, and now that I've built the MVP (super alpha version if you can call it that) on my own I want to get these people and others to try it out and give me some feedback.
How do I go about this?
"Looks interesting" is often a polite way to say "cool, but we don't need it". Imho, the first thing you really need to figure out is, if you are onto an actual problem that people have and are willing to pay for. I have built 2 MVPs before that nobody used in the end because we didn't do our homework in the pre-MVP explorative part of the journey.
Talking to more people should be your number one priority at the moment. I wouldn't even pitch the solution in the beginning but start asking about their work, their roles, their problems etc. If there is a clear fit you may pitch/teaser your solution at the end.
Contrary to @salimstartup, I would say marketing is definitely something you should do, but you shouldn't pay for it. Content marketing is really the way to go at the moment. Find out where your customers hang out (hackernews, reddit, medium, linkedin, twitter, ...) and post valuable content. Takes a lot of time but makes getting interviews with other people much easier and eventually should lead to (some) inbound leads/users as well.
Since it is a B2B solution - don’t try too much seo, marketing, etc whatever else founders use