Despite increased competition from IBM(s ibm) with its new SoftLayer franchise and other players, Amazon(s amzn) Web Services continues to lead the combined pack in cloud revenue, according to new Synergy Research Group numbers. The figures, which combine Infrastructure as a Service and Platform as a Service revenues in one big bucket, showed AWS grew a whopping 55 percent in an overall market that grew 46 percent.

Once again, revenue from AWS  alone was bigger than that of all the listed competitors combined although all the major vendors showed growth.

Here are some caveats:  Accounting for cloud revenue (let alone profit) is an extremely slippery business, since none of the big companies make it easy for outside number crunchers. Also, figuring out a dividing line between IaaS and PaaS is another world of hurt. But here’s what Synergy came up with:

By Synergy’s measure, total IaaS/PaaS revenues for the quarter passed $2.5…