I always find pricing in terms of developer time saved to be a tough sell, because different companies have different opportunity costs, value the product differently, pay differently, and different engineers have different productivity. That's a lot of axes to reason about. Most tools boil down to this eventually, but some are obviously things you'd never build internally (for a given size of company), whereas some are incremental improvements over what you might already be doing. I think Nucleus is in the latter category for many which makes this harder.

Have you considered things like per-region, per-host, per-cluster, per-active developer etc?