If you knew the technologies/software that Fortune 2000 companies are spending the most on, you should build complementary products, or similar things that solve the same problems those products are solving?
I worked on many CRUD apps that had say 4 different groups of users. We made a library / system for determining what "level" a user is, based on what Active Directory roles the user is assigned. In the application, you can show or hide components based on this level. Making some sort of middle-ware that abstracts things for developers, so they don't have to think about things like AD, is a huge area of opportunity.
But similarly, I’ve found it convenient for all my other 2FA needs from GitHub to RuneScape. So even then, it has value to consumers.
So what proxy method would you use to determine that Fortune 2000 companies are spending twice as much on Splunk as they do on New Relic (for instance)?