(Not the OP, but running a fairly similar setup, albeit for EKS nodes rather than ECS nodes :) ) Fargate Spot is about a third of the price of Fargate (at leas

(Not the OP, but running a fairly similar setup, albeit for EKS nodes rather than ECS nodes :) ) Fargate Spot is about a third of the price of Fargate (at least in eu-west-1 now according to: https://aws.amazon.com/fargate/pricing/ https://aws.amazon.com/fargate/pricing/ ); so the savings are roughly identical. Re risk of running out, our current strategy is to use different-but-closely-similar instance groups; so for example we have an autoscaling group running a mix of: - m5.large - m5dn.large - m5n.large - m5ad.large - m5d.large Which are the same price on Spot instances, but I'd wager it'd be pretty rare to have all these families reclaimed at once. (We also use some on-demand only ASGs with lower priority in the cluster-autoscaler to ensure that if it _does_ happen, then we'll have a fallback)