Compstash is a private comp management platform built for commercial real estate brokers, brokerage teams, portfolio managers, and research analysts. It gives real estate professionals a centralized, secure place to upload and organize closed deal data, including transaction details, property photos, lease comps, sales volumes, and supporting documents, without that data ever being shared with or resold to the broader market. Users can analyze their deals over time, identify market trends by asset type, and generate professional branded reports in Excel and PDF formats with a single click. Compstash supports bulk uploads, map-based property visualization, and granular permission controls for multi-user teams, and is designed to be simple enough to delegate to a virtual assistant. Compstash helps commercial real estate professionals work faster and protect the comp data they have spent years building, so they can spend less time buried in spreadsheets and more time closing deals, or finally getting out on the golf course.