Container vs Virtual Machines (VM): Key Differences & Overview Containers and Virtual Machines (VMs) are two technologies IT administrators, developers, and organizations use to optimize their infrastructures. While they share some similarities, they serve different purposes. Let's discuss them. Before we begin, be sure to subscribe to NinjaOne’s IT Video Hub for more tech content like this. Containers vs. Virtual Machines: What's the Difference? Containers and virtual machines (VMs) are two very popular virtualization technologies with different architectures. Containers are lightweight, portable units that run packaged applications on a shared operating system kernel. Meanwhile, VMs are software-based emulations of physical computers— each with its own operating system and virtualized hardware. Their other key differences include: Startup Time: Containers start almost instantly, whereas VMs take longer because of slow OS boot times. Resource Usage: Containers are more resource-efficient than full-stack VMs. Portability: Containers are more portable in VMs, which are bulkier and harder to move across environments. Isolation & Security: VMs offer stronger isolation and security by default, while containers provide process-level isolation. Performance: Since containers have better resource utilization than VMs, they generally perform better. Scalability: Containers are more scalable than VMs because of their quick startup times, making them ideal for dynamic infrastructure and microservices. These distinctions determine the best use cases for both containers and virtual machines. When to Use Containers & Virtual Machines Let's discuss the best use cases for each technology. Containers are ideal for: Uploading and deploying cloud applications. Deploying applications in CI/CD environments. Building scalable microservices-based or cloud-native applications. Virtual machines are best suited for: Running different operating systems on a single host. Isolating sensitive or regulated workloads. Running applications with specific configurations. Can you use both containers and VMs on one network? Yes, you can. Hybrid environments are ideal for multi-tenant setups that require full isolation between different users. Containers and virtual machines each have their strengths and limitations. Understanding their differences will help you create efficient, scalable, and secure infrastructure for your organization's needs and goals. For more information, check out our official blogpost on containers and virtual machines linked in the description below.