McLean – October 29, 2026 -- Appian's Appian Defense Cloud (ADC) has received Impact Level 5 (IL5) Provisional Authorization to Operate from the US Department of War (DOW), clearing the platform to handle the department's highest-sensitivity unclassified workloads.

The IL5 designation allows ADC to store and process DOW mission-critical data, controlled unclassified information and unclassified national security systems. ADC builds on Appian's existing IL5 Appian Government Cloud offering.