During Russia’s invasion of Ukraine, foreign private-sector information technology (IT) firms have provided hardware, software, and cyber intelligence to Kyiv. This assistance has helped Ukraine to stay online during the war by providing stronger network architecture and enhanced security. This paper examines the specific companies involved, the products and services they have offered, and the risks and opportunities associated with their assistance. The authors compile a list of lessons learned and offer actionable policy recommendations so that governments and IT firms are better able to navigate this crisis and similar crises in the future.