alternatives to jenkins in AWS
AWS recently announced AWS CodeStar to develop, build, and deploy applications with CI/CD, utilizing AWS Code Pipeline, Code Build & Code Deploy. It also comes with predefined templates that provides appropriate selection of tooling based on Technology requirements.
AWS CodeDeploy isn't a CI tool; it's a CD tool. They have something called CodePipeline, but that is simply a service that allows you to string together a bunch of different tools (some AWS, some not, including Jenkins for CI) to accomplish what you can with a Jenkins Pipeline.
You may use AWS CodePipeline (along with CodeDeploy) for deploying your application wherever you like. It works pretty well but without Jenkins you won't be able to run any test before actual deploying.