Full Answer
15-30% premium for owned data. $10M company = $1.5-3M valuation increase from data ownership.

15-30% valuation premium for owned warehouse vs platform-only. $10M company with BigQuery data: $11.5-13M valuation. Data in GA4 only (Google owns): $10M. Difference: $1.5-3M from owning vs renting data infrastructure.
15-30% premium for owned data. $10M company = $1.5-3M valuation increase from data ownership.