When comparing Wercker vs GoCD, the Slant community recommends Wercker for most people. In the question“What are the best continuous integration tools?” Wercker is ranked 8th while GoCD is ranked 18th. The most important reason people chose Wercker is:
Wercker is based on Docker and it allows developers to create their own deployment stacks inside Docker containers. These stacks range from programming languages, to services, and even to notifications.
Specs
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Pros
Pro Ability to create and use custom environments
Wercker is based on Docker and it allows developers to create their own deployment stacks inside Docker containers. These stacks range from programming languages, to services, and even to notifications.
Pro Free unlimited number of private repositories CI while in Beta
While in beta, Wercker offers unlimited free public and private repositories.
Pro Social networking elements
Wercker has an activity feed with which different team members can see and follow everything their colleagues have been doing. This gives the tool a certain social network feel, much like GitHub itself.
Pro Native support for pipelines
GoCD supports pipelines natively. This way you can build your projects by pipelining them.
Pro Good traceability of what contributed to a given artifact
GoCD's LEAN value stream UI helps all stakeholders focus on efficient product delivery (instead of collections of technical tasks).
Cons
Con Need Scripts for everything
Almost all operations are shell based, they are not configurations possible, your CI is as good as your scripting
Con Does not offer many plugins
Since it's relatively new and not very popular, there are few plugins available in GoCD.