The Stack
L9
Finance & billing
If you sell online, payments, sales tax, and revenue metrics have to exist before the first charge — retrofitting tax nexus after the fact is a genuine trap.
What we install
The trap most founders hit
Taking money with no sales-tax handling, or having no idea what MRR and churn are doing.
Want this layer installed, not just recommended?
The MVP-to-Market Sprint wires all eleven layers on the paved road — fixed scope, by the project.