Businesses are already wary about buying from startups since there's no guarantee their product will be around in a year. If the product doesn't even exist yet...
Maybe I'm missing some angle, but I really don't see who would use this.
Our product, for example, is a security key [1] and has certainly more value for businesses than consumers. However we make our campaigns more consumer friendly to resonate with these communities. But we use "the buzz" to sell to businesses.
Another platform is CrowdSupply [2], you can definitely find very specialized electronic tools for businesses, though again the vibe is for hackers & makers.
Are you trying to sell something, or are you exploring the idea to make such a platform?