
Not sure I have enough time to run deep investigation whether this question answers Yes or No. But at first sight this approach is profitable against purchasing very costly tools like from HP or Borland. Hopefully the dynamic of expanding SaaS for testing will grow down the road. It seems the biggest player on the cloud testing is Amazon. If they really provide honest and cost-efficient plan with capability and flexibility of load testing model, so performance professionals should take a sharp look on this trending technology. Indeed, why should I pay thousands $$ for load testing especially for a single application/task?
Eventually the SaaS will come to narrow segments like load testing, hosting specific environments like test stands, build and continuous integration servers. I’m also interested if SaaS providers will place such plans like temporary/limited access to dedicated environments running various OSs, apps and services and as premium services they could prepare and let on lease required virtual machine configurations. I think this a great gate for vendors of professional toolkits, let say HP could provide such plans for their QC, QTP and LoadRunner. Here is a scheme: ready environment + preinstalled and configured vendor’s tool + supplementary package (like open source popular tools, e.g. Subversion, notepad++, XAMPP, etc). That would be perfect for automated testing particularly on short and middle projects duration. Resulting in significant reduce of cost on environmental needs will cause many advantages such as test automation ROI improvement and removing overheads on administration and supporting environments.

Such huge players like HP, Microsoft (Win Oss, Visual Studio, MS), Oracle&Sun made steps in this direction, the rest guys will move up too sooner. But I’d like to have their services more affordable, as well as with hosting specific dev/QA software and finally, I wish they propose flexible tariffs with “pay just for how long you use service”. Also there is a field to host, maintain and administrate Open source only, for instance – providing variations of preconfigured Linux distributives jointly with services – please don’t mix with hosting – I want various environments for development and testing with temporary ownership.
Is anyone who has success story of using SaaS for development and testing?