Bill Gates stated that in business, automation applied to an efficient operation magnifies efficiency and to an inefficient operation magnifies inefficiency. The DevOps movement is evidence for this, and a research report shows that companies with a 10% or more increase in Continuous Delivery frequency are 2.5 times more likely to have double-digit revenue. Here is a list of 21 automated deployment tools:

• Jenkins: A leading CD and CI tool with high extensibility and a large community, forked from Oracle's Hudson-CI.
• ElectricFlow: A release automation tool with a free community edition, supporting plugins and Groovy-based DSL, CLI, and APIs.
• Microsoft Visual Studio: A DevOps offering with features like defining release definitions and tracking releases.
• Octopus Deploy: Built for automating.NET application deployments, can be installed on a server or in Azure.
• IBM UrbanCode: Automates deployment to on-premise or cloud environments, purchased by IBM in 2013.
• AWS CodeDeploy: Amazon's automated deployment tool with a list of featured customers and platform agnosticism.
• DeployBot: Connects to Git repositories and allows manual or automatic deployments with integrations.
• Shippable: Defines its own "pillars of DevOps" and runs builds on Docker-based containers.
• TeamCity: A CI server from JetBrains with smart configuration features and Docker images.
• Bamboo: The CI offering from Atlassian, with integrations and a "small teams" package.
• Codar: A continuous deployment solution from HP triggered by Jenkins.
• CircleCI: A CI solution emphasizing flexibility, reliability, and speed, with source to deploy support.
• Gradle: A build tool used by big names, using Groovy build scripts and build-by-convention frameworks.
• Automic: Applies DevOps principles to back-end apps.
• Distelli: Specializes in deploying Kubernetes Clusters and was founded by a former AWS employee.
• XL Deploy: An application release automation tool with various plugins and an agentless architecture.
• Codeship: A hosted CI solution with native Docker support for customization.
• GoCD: A CD server emphasizing visualizing workflows, an open-source project by ThoughtWorks.
• Capistrano: An open-source Ruby deployment tool with a scriptable and expressive API.
• Travis CI: Synced to GitHub for automated testing and deployment, free for open-source projects.
• BuildBot: An open-source Python-based CI framework with "batteries included" for flexible use cases.