We're still working on defining the exact pricing, but it would be a usage-based monthly subscription model, since our core costs are related to infrastructure scaling.
The good news is that if you had to switch workflow tools, our product design makes your code easily portable (no proprietary config files, no packages to add to your code). You would just lose access to the scaled workflow and execution logic.
I'd love to discuss more with you to see what your team would see as reasonable. Happy to work something out.