When comparing Semaphore CI vs Distelli, the Slant community recommends Semaphore CI for most people. In the question“What are the best continuous integration tools?” Semaphore CI is ranked 10th while Distelli is ranked 29th. The most important reason people chose Semaphore CI is:
Whenever a new push is made on GitHub or Bitbucket, Semaphore automatically runs tests on that branch.
Specs
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Pros
Pro Automatic Testing
Whenever a new push is made on GitHub or Bitbucket, Semaphore automatically runs tests on that branch.
Pro Free for open source
Semaphore supports open source and offers unlimited open source projects.
Pro Complete customer support
Semaphore offers all-around customer support for its commercial users.
Pro Free 100 builds per month for private projects
Semaphore offers 100 builds every month for private projects. This package is free for an unlimited time and offers: free & unlimited deploys, unlimited collaborators and running tests in parallel.
Pro GitHub integration
Projects can be imported from GitHub and Semaphore will automatically connect with that repository, once that's done, it will automatically trigger for every code commit.
Pro Docker support
Out of the box Docker support. Additionally, Semaphore can cache Docker images by using included docker-cache commands.
Pro Easy to configure
Semaphore is quite easy to configure and work with. It easily integrates with GitHub and a first build is only a few clicks away.
Semaphore is configured using .yaml configuration files which can be added from the web UI. There are a lot of tutorials out there that help developers configure Semaphore to their preference.
Pro Can deploy to any server, on any platform
Distelli suports all of the popular platforms and can be deployed to any server.
Pro Allows tracking deployments
Through Distelli, the user can track who deployed what application to what environment, as well as when it happened.
Pro Environment-specific commands
In Distelli, the user can set up environment-specific commands to run before, during, or after a deployment.
Pro Displays real-time logs
As the user deploys, real-time logs are displayed, providing useful information and giving the user an intuitive means off which he/she can operate.
Cons

Con Proprietary with private project for $30/month
Semaphore is not free and nor is it open source. Pricing starts at $29 per month. However, there is a free option for private projects which have less than 100 builds per month and it's free for open source projects.
Con Security concerns
Although Distelli is very easy to use and helps developers who don't want to spend time setting up their build environment, there are a number of security concerns regarding the tool. This is because you have to host an agent that allows RPC with a relatively unknown third party.
