Enterprise pricing. Specific to each customer, but if you don't have a team of lawyers, you can't afford it. You'll need those lawyers to deal with the contract provisions limiting you from using open source software and argue about how many seats you're actually licensing.

Last time I heard a few years ago, it cost low seven figures by the time you're done with everything.

There's not a lot of competition in this space.

However much you can pay. Millions. Not even joking. It may be worth it for a big ticket aircraft program though.