I used SWF for an auto-failover scenario many years back and found it very effective. I always liked the fact that worker machines could be on-premise if needed

I used SWF for an auto-failover scenario many years back and found it very effective. I always liked the fact that worker machines could be on-premise if needed. I think Step Functions can also interoperate with on-premise resources/code also, though I have yet to work with Step Functions so far.