Github Actions vs Cirrus CI comparison of Continuous Integration servers

	Github Actions https://github.com/features/actions	Cirrus CI https://cirrus-ci.org
Unique feature	Best GitHub integration possible	FreeBSD support
Type of product	SaaS / On Premise	SaaS / On Premise
Offers a free plan	Yes The on premise plan (not yet available) will be free, 2000 build minutes included in the free cloud plan. Completely free plan for open source projects.	Yes Free for open source projects
Predictable pricing	Yes (partial) While it's clear what the cost is (priced per build-minute), figuring out costs can be a hassle, especially as the price can vary quite a bit depending on commits to the project. One advantage for GitHub Actions is that the tiers define a maximum amount of minutes, so it's easier to predict the final cost. You can also purchase aditional runners with pricing dependent on the platform (MacOS, Linux, Windows)	Yes Besides the seat (per-user access) you need to buy compute credits for running the build, priced differently depending on the machine you're running builds on.
Support / SLA	Yes Community support available for any tier, unclear at what point and if dedicated support is available. Safe to assume that eneterprise clients can access technical support.	N/A Not clear if they offer any real SLA on support.
Paralellism Every CI servers tends to address this differently (parallel, distributed, build matrix). Some of it is just marketing, and some is just nuance. For this table, parallel means that tasks can be run concurrently on the same machine, distributed means that tasks can be scaled horizontally, on multiple machines How to split tests in parallel in the optimal way with Knapsack Pro	Yes Matrix builds allow concurrent jobs, even multi-platform.	Yes There are limits on how many tasks can be run in parallel for the free tier builds: https://cirrus-ci.org/faq/#are-there-any-limits
Distributed builds distributed means that tasks can be scaled horizontally, on multiple machines How to split tests in parallel in the optimal way with Knapsack Pro	N/A No specific mention, but given the fact that tasks can be run on multiple platforms, it's likely that distributed builds are also available.	N/A
Containers support / Build environment	Yes Linux, macOS, Windows, and containers, or run directly in a VM.	Yes Allows containers or VMs for every major operating system.
Analytics / Status overview Analytics and overview referrs to the ability to, at a glance, see what's breaking (be it a certain task, or the build for a specific project)	Yes Minimal status overview definitely available, with live logs and GitHub integration. Unclear how far it goes.	Yes
Management support How easy is it to manage users / projects / assign roles and permissions and so on	N/A Unclear from the available documentation	N/A
Self-hosted option	Yes Coming soon, not available yet.	Yes
Hosted plans / SaaS	Yes	Yes
Build pipelines A continuous delivery pipeline is a description of the process that the software goes through from a new code commit, through testing and other statical analysis steps all the way to the end-users of the product.	Yes Called GitHub Action Workflows, they are defined in separate Docker containers, using the YAML syntax (they used to support HCL, but they're migrating away from that)	Yes Defined via YML config files
Reports Reports are about the abilty to see specific reports (like code coverage or custom ones), but not necesarily tied in into a larger dashboard.	N/A Unclear from the available documentation	N/A
Ecosystem Besides the official documentation and software, is there a large community using this product? Are there any community-driven tools / plugins that you can use?	Yes Thanks to the large following, GitHub Actions already enjoys a wide varierty of available pre-made workflows, which you can browse right on the homepage: https://github.com/features/actions	N/A
Specific language support: Ruby Some CI servers have built-in support for parsing RSpec or Istanbul output for example and we mention those. Some others make it even easier by detecting Gemfiles or package.json and automate parts of the process for the developer.	Yes Unclear how, but they mention Ruby support specifically on the homepage	No (partial) No specific support from what I can gather, but it does provide documentation for Ruby, including integration with the knapsack_pro gem.
Specific language support: JavaScript	Yes Unclear how, but they mention Javascript (Node.js) support specifically on the homepage	No No specific support and no documentation on setting up a CI/CD process for a Javascript project.
Integrations 1st party support for common tools (like Slack notifications, various VCS platforms, etc)	Yes Integrations made possible via the shared third party workflows available (AWS, Azure, Zeit, Kubernetes and many more)	Yes Integrates well with GitHub - the whole CI/CD process starts with a commit to a GitHub repo.
API Custom integreation is available, via an API or otherwise, it's mentioned separately as it allows further customization than any of the Ecosystem/Integration options	N/A Unclear at the moment, but assume GitHub Actions will be integrated with the GitHub GraphQL API (one of the more mature GraphQL API implementations available)	Yes Provides a pretty nifty GraphQL API which allows querying the Cirrus CI Schema, as well as webhooks support for other types of custom integrations (such as Slack or IRC notifications, for example). They also added support for GitHub actions
Auditing	N/A	N/A From what we can tell, there's no specific support for auditing changes in the Cirrus CI config (other than what is traceable via git commits to the YML config file)
Additional notes		Seems to be used by companies with a solid engineering background (Google)

Programming Language	Supported test runners	Installation guide	Knapsack Pro Library README / Source
Ruby	RSpec, Cucumber, Minitest, test-unit, Spinach, Turnip	Install	knapsack_pro gem
JavaScript	Cypress.io	Install	@knapsack-pro/cypress
JavaScript	Jest	Install	@knapsack-pro/jest
JavaScript / TypeScript	Any test runner in JavaScript	How to build native integration with Knapsack Pro API to run tests in parallel for any test runner	@knapsack-pro/core
Any programming language	Any test runner	How to build a custom Knapsack Pro API client from scratch in any programming language	-

Github Actions vs Cirrus CI comparison of Continuous Integration servers What are the differences between Github Actions and Cirrus CI?

Github Actions

Cirrus CI

Best GitHub integration possible

FreeBSD support

SaaS / On Premise

SaaS / On Premise

Yes

Yes

Yes (partial)

Yes

Yes

N/A

Yes

Yes

N/A

N/A

Yes

Yes

Yes

Yes

N/A

N/A

Yes

Yes

Yes

Yes

Yes

Yes

N/A

N/A

Yes

N/A

Yes

No (partial)

Yes

No

Yes

Yes

N/A

Yes

N/A

N/A

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GitHub Actions testing Ruby on Rails with RSpec and parallel jobs (matrix feature)

How to run Jest tests on GitHub Actions - JS parallel jobs with matrix feature (NodeJS YAML config)

GitHub Actions Cypress.io E2E testing parallel jobs with matrix feature (NodeJS YAML config)

Github Actions parallelism integration

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Github Actions vs Cirrus CI comparison of Continuous Integration servers
What are the differences between Github Actions and Cirrus CI?

How to run parallel tests on Github Actions and Cirrus CI
to execute 1-hour test suite in 2 minutes?

How much can you save with faster tests
on Github Actions and Cirrus CI?