Two quotes can offer similar roles while excluding different parts of delivery. Normalize scope before comparing rates.
Provide one reference lot
Share the same journey, dependencies and acceptance criteria. Ask each supplier to restate its assumptions. Unknown integrations deserve separate investigation estimates.
Include your contribution
Account for product decisions, code reviews and business testing. Identify tools and recurring service charges. A lower external rate may require more internal supervision.
Compare completion
Check release preparation, documentation and correction of acceptance findings. Require exclusions to be explicit. Then evaluate the first delivered result against the agreed scope. This approach gives your buyer a practical comparison without relying on unsupported savings percentages or assuming that equal team size creates equal delivery capacity.
Related reading : Buying a product squad: ask who accepts the delivery. Discuss your project scope with Sky Vaults.