The article provides an in-depth comparison between Vagrant and Docker, two popular technologies used for creating consistent development environments. Vagrant automates the process of spinning up virtual machines (VMs) using a base image, ensuring that all necessary libraries and components are present regardless of the physical machine. Docker, by contrast, creates lightweight containers that abstract the hardware and operating system, allowing for more efficient resource utilization and faster build speeds. While Vagrant is suitable for testing under different system resource capacities and specific operating systems, Docker offers greater portability and ease of use. Security considerations differ, as Vagrant VMs are only accessible from the localhost with some vulnerabilities, whereas Docker containers are less isolated due to shared kernels. The article concludes that while VMs are resource-heavy and harder to deploy, Docker containers fit better in an automated development workflow, with tools like Earthly enhancing Docker's build and deployment processes. The choice between Vagrant and Docker ultimately depends on specific needs such as speed, efficiency, and integration.