Your planning estimate
Estimate only — not a quotation
How the estimate is calculated
The build side uses the shared cost engine. The buy side is your current annual software spend multiplied by three. Compare them as planning figures only.
Assumptions
Buy cost should include licences, implementation and extra seats you already expect. Build cost does not include ongoing product expansion after year one.
Limitations
Switching cost, vendor lock-in and internal change effort are not fully priced.
Frequently asked questions
What if we do both?
Many teams buy the commodity layer and build the workflow that differentiates them. Use the unique-workflow answers to see that pressure.