GitHub Actions and Jenkins are both Continuous Integration/Continuous Delivery (CI/CD) tools that can create CI/CD pipelines in various environments and ecosystems, including the Google Cloud Platform (GCP). Jenkins is an open-source, older, and more comprehensive tool requiring significant skills and effort. GitHub Actions is simpler and closely tied to the GitHub platform. This article compares the two tools in ten dimensions: workflow definition and configuration, scalability and performance, authentication, security and monitoring, cost management, community, ecosystem and plugin support, parallelism and concurrency, deployment strategies, vendor lock-in, pipeline maintenance, and dependency management and speed of innovation. How they compare in each dimension within the GCP ecosystem can help organizations make an informed decision about which CI/CD pipeline to use.