CircleCI vs Spinnaker

CircleCI provides CI/CD tooling for engineering teams to ship code and validate changes. Smarter Testing includes test impact analysis, dynamic test splitting, and automatic reruns of failed tests. Execution options include Docker, Linux, Arm, Windows, macOS, and self-hosted runners. CircleCI Cloud supports repositories hosted on GitHub, GitLab, GitLab self-managed, Bitbucket Cloud, and Cursor Origin, which is in beta. Teams can use Orbs, shareable configuration packages, and private orbs are available across listed plans. CircleCI Deploys lets teams monitor incremental releases and roll back automatically. Security controls include encrypted source-code communication, restricted contexts, audit logging, isolated build sandboxes, and OpenID Connect support. CircleCI says it is SOC 2 Type II compliant and has a FedRAMP Tailored designation. Its API supports programmatic interaction with pipelines, projects, and organizations. A free plan is listed, and Performance starts at $15 a month. Free-plan credits expire after a month without rollover; paid credits roll over and expire after a year.

Spinnaker is a free, open-source, self-hosted multi-cloud continuous delivery platform for releasing software changes. Its pipelines can run integration and system tests, manage server groups, monitor rollouts, and start from Git, Jenkins, Travis CI, Docker, or CRON events. Built-in blue/green and canary strategies are available, and teams can define custom strategies. Documented providers include AWS, Azure, Cloud Foundry, Google Compute Engine, Kubernetes, Oracle Cloud, and App Engine. At least one provider must be enabled and configured before applications can be deployed. CI integrations include Jenkins, Travis, AWS CodeBuild, Concourse, Google CodeBuild, and Artifactory; source integrations include GitHub, Bitbucket Server/Stash, and GitLab. Authentication supports OAuth 2.0, SAML, or LDAP, while authorization can use groups or team-based role providers. SSL secures UI and API communication. Kubernetes is the recommended installation route, with local Debian packages documented for smaller deployments. The local guide recommends at least four cores and 16GB RAM and warns that single-machine installations may have downtime.