Azure DevOps Pipelines vs Screwdriver

Azure Pipelines is a CI/CD service within Azure DevOps that supports building, testing, and deploying to any platform and cloud. It offers both YAML-based and classic visual pipelines with support for containers and multi-stage deployments.

Screwdriver is Open-source build platform originally developed at Yahoo for continuous delivery at scale.. It is available under a free model. This tool falls under the ci cd category.