Composer vs Docker Compose: What are the differences?
Composer: Dependency Manager for PHP. Composer is a tool for dependency management in PHP. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you; Docker Compose: Define and run multi-container applications with Docker. With Compose, you define a multi-container application in a single file, then spin your application up in a single command which does everything that needs to be done to get it running.
Composer and Docker Compose are primarily classified as "Package Managers" and "Container" tools respectively.
"Must have dependency manager for PHP" is the primary reason why developers consider Composer over the competitors, whereas "Multi-container descriptor" was stated as the key factor in picking Docker Compose.
Composer and Docker Compose are both open source tools. Composer with 20.2K GitHub stars and 5.54K forks on GitHub appears to be more popular than Docker Compose with 16.6K GitHub stars and 2.56K GitHub forks.
StackShare, Typeform, and CircleCI are some of the popular companies that use Docker Compose, whereas Composer is used by Walls.io, Zumba, and Infoshare. Docker Compose has a broader approval, being mentioned in 797 company stacks & 627 developers stacks; compared to Composer, which is listed in 95 company stacks and 55 developer stacks.