Today, many companies, such as Amazon, Google, Microsoft, and others claim to provide the one and only cloud solution, but their offerings are different, aren’t they? Or do they have more in common than we think? Our talk starts with an introduction to cloud technology as it exists today by comparing the different products from the cloud providers. Next we will outline how technology from the Eclipse Runtime projects can contribute to a combined ’Cloud Stack’ and discuss currently available and possible future scenarios.