Wealth-tech platforms are punished twice for “AI-ready” data lakes: once on infrastructure cost, and again on regulatory perimeter. Open Portfolio is BYOC boundary infrastructure — keep IdP and approved storage; parse broker exports at the edge; send only sanitized context into a stateless inference hop.
Data perimeters are architectural, not checkbox compliance alone. Client-side CSV/Excel parsing and customer-controlled stores mean PII does not need to become a permanent third-party cloud liability to unlock portfolio intelligence. Pocket Portfolio is the live harness proving adapters under CSV chaos — not Open’s default enterprise store.
For CTOs and CISOs: treat AI as a bounded processor. The sovereign stack separates ingestion (edge), control plane (auth/quotas you scope), and inference (stateless) so enterprise buyers can reason over broker data without exposing unmetered public data endpoints or building a GDPR-grade vendor warehouse.