EnduraFAST (operating as Endurazymes) sells an enzyme-screening platform that tells enzyme engineering teams which candidate variants stay properly folded and stable under real-world process stress such as elevated temperature, harsh chemicals, oxygen limitation and time. The platform is built on hsFAST reporter technology developed at Los Alamos National Laboratory: a small, oxygen-independent fluorescent reporter fused to a target enzyme, whose signal tracks proper folding and is lost on misfolding, denaturation or aggregation. Teams screen for durability first and reserve expensive activity testing for the candidates most worth advancing. The company also runs feasibility pilot programs for customers evaluating their own enzyme libraries.