"...built a mobile app that used it as a backend, added an HTTPS-based API using Amazon API Gateway and a website, and then unit and load tested it, all without using any servers..."
(4) Are there any alternatives to Amazon Lambda? - Quora
"The most obvious alternative is Google Dataflow: Google Cloud Dataflow. Another potential alternative is to use Apache Storm or Apache Spark. Microsoft is running Apache Storm on Azure as a managed service which makes it a clear option as a cloud hosted service:
Microsoft announced (shortly after Google's above announcement) its own Azure Stream Analytics (ASA) service in general availability: Microsoft Launches New Big Data Stream Analytics Cloud Service