InboxIntel was built to help a client convert a very large, highly sensitive email archive into structured data for analysis—without sending a single byte to the cloud. The client had tens of thousands of emails containing project decisions, deliverables, and payment-related conversations, but manual review was slow, error-prone, and impossible to scale. Privacy constraints ruled out external APIs, and the client also needed audit-grade traceability from every extracted data point back to the original email text.