Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development

CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.

Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.

Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.

Bitrise - Tens of thousands of agencies, startups and enterprise companies with mobile apps - including Runkeeper, Grindr, Duolingo and more - use Bitrise to automate their way to increased productivity & speed

Semaphore - Semaphore is a fully managed, high performance testing and deployment solution for your company. A Continuous Integration tool.