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If anyone else was wondering, this seems to originate from IBM in collaboration with Adobe. More information on the architecture here: https://thenewstack.io/behind-scenes-apache-openwhisk-server...

OpenWhisk started entirely from IBM Research. It was open sourced in Feb 2016. Adobe came on board as part of the induction to Apache Incubator.

OpenWhisk is what runs IBM Cloud Functions: https://console.bluemix.net/openwhisk/