"Start with the free tier for a few build configs and see how it works for you, then according to your scale find the enterprise license which fits you the most."
JFrog Pipelines empowers software teams to ship updates faster by automating DevOps processes in a continuously streamlined and secure way across all their teams and tools. Encompassing continuous integration (CI), continuous delivery (CD), infrastructure and more, it automates everything from code to production. Pipelines is natively integrated with the JFrog Platform and is available with both cloud (software-as-a-service) and on-prem subscriptions.
TeamCity is a Continuous Integration and Deployment server that provides out-of-the-box continuous unit testing, code quality analysis, and early reporting on build problems. A simple installation process lets you deploy TeamCity and start improving your release management practices in a matter of minutes. TeamCity supports Java, .NET and Ruby development and integrates perfectly with major IDEs, version control systems, and issue tracking systems.
Easily sync your GitHub projects with Travis CI and you'll be testing your code in minutes. Travis CI for private repositories has plans for every size project. With Travis CI testing your open source project is 100% free.