Niche Early Users

The idea is to allow companies to compare themselves with their competitors for strategically important metrics. For example, if they connect their Quickbooks account, it'll show among other stuff their revenue growth rate vs industry, market share etc. For that to make most sense I want to contact companies in the same industry, which preferably use various SaaS products, are metrics-driven and are likely to forgive an MVP's initial bugs (so no enterprises).

Any suggestions on a niche like that? It's important for me that those companies would be from the same field, in order to compare apples to apples.