New platform gives technology companies a ready-made GovCon back office, eliminating years of operational setup. MENLO PARK, Calif.: Arkenstone Defense emerged from stealth today with $35 million in seed funding to eliminate the compliance, security, workforce, and operational burden that keeps many commercial technology companies from selling to the U.S. government. The round was led by J2 Ventures, with participation from Susa Ventures, Granite Hill Capital Partners, and Artis Ventures.