Then I recommend Gearman (http://gearman.org/ http://gearman.org/). I think this is just part of the puzzle, but you can definitely build around it. You can twe

Then I recommend Gearman (http://gearman.org/ http://gearman.org/). I think this is just part of the puzzle, but you can definitely build around it. You can tweak it, and get every performance bit you want. Nodejs (http://nodejs.org/ http://nodejs.org/) can definitely help you as well. It is also another part of the puzzle not an out of the box solution for BaaS. If you are looking for a out of the box solution, I don't really know any open source BaaS so far. You can build your own, but you will still have to install and manage your stack on your own. At the time when we started, we were also looking for something we could use. We couldn't find anything so we built our own. We started to improve it and make it better. And that is why we are now making it a start-up. We have definitely thought about open sourcing it, but I don't think we are ready for that yet. I would really appreciate if you would test our service. No strings attached. We are still in beta, and still validating the idea. Your feedback would be of great help. Additionally you might get ideas for building your own. If you are interested just check it out in http://iknode.com http://iknode.com and register in http://iknode.com/register.php http://iknode.com/register.php