Virtual Machines and containers are basically resource vitalization technologies that share certain subtle similarities. However, the main difference between these two technologies is that virtual machines can be used to virtualize the whole machine, including its hardware layer. In contrast, containers can only be used to virtualize the application layer that exists above the level of the operating system. Containers are lightweight, portable, and constitute a robust ecosystem, which enhances the speed of application modification and deployment. Virtual machines offer a dynamic and interactive development platform and are totally immune to interferences by neighboring virtual machines. However, these are not as cost-effective and speedy in terms of performance as containers.