Making a decision on which CI/CD tool to use will depend on your needs & project requirements as there are a number of CI/CD tools such as Gitlab, GitHub, Travis, TeamCity, Jenkins, and a lot more. If you want to take advantage of the integrations across services in the AWS ecosystem, don't want a maintenance overhead, and need a highly scalable secure solution AWS CI/CD tools such as AWS CodePipeline will cater to such requirements. If you’d like a quick introduction to AWS CI/CD have a look at my old post here, AWS CI/CD 101.
Did you know AWS CodePipeline costs $1.00 per active pipeline per month? Personally, I think that’s amazing from a cost perspective.