Shippable alternatives

Shippable is continous delivery platform that offers a containerized continuous integration. You can use custom Docker containers. Shippable gives you all the benefits of a single tenant build system with none of the complexity.
Shippable alternatives are:
Travis CI, Codeship, Jenkins, CircleCI
Here are the latest news about Shippable:

2014 Continuous integration tool Shippable raises $8M

Shippable, which offers a containerized continuous integration and delivery platform based on Docker containers, raised an $8 million Series A round. The company plans to use the additional funding to continue its push into the enterprise, which in many ways is only now starting to adopt continuous integration. What makes Shippable’s solution stand out is that it leverages containers to create a faster, easier-to-use and — maybe even more importantly — cheaper solution for its customers who can host its service both in their own data centers or on a public cloud. Continuous integration includes running unit tests on all of the code, and Shippable uses containers to allow it to quickly grow or shrink these virtual test labs depending on workloads. Because these containers are essentially replicas of the ones that are used in production, it’s easy to ensure that the development and test environments match the production setup.