AWS CodeBuild vs Cirrus CI comparison of Continuous Integration servers

	AWS CodeBuild https://aws.amazon.com/codebuild/	Cirrus CI https://cirrus-ci.org
Unique feature	AWS integration	FreeBSD support
Type of product	SaaS	SaaS / On Premise
Offers a free plan	Yes The AWS free-tier includes 100 build-minutes per month, on their smallest machine. It's unclear, but it seems like this applies only to the first year of service.	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.	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	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	N/A	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	N/A
Containers support / Build environment	Yes Builds run in specific-to-the-project, isolated environments	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 Offers minimal information built in, but allows integrations with tools such as CloudWatch (another Amazon product), or streaming build information to your own API, for more in-depth analysis.	Yes
Management support How easy is it to manage users / projects / assign roles and permissions and so on	Yes Professional user management via AWS Identity and Access Management: https://aws.amazon.com/iam/	N/A
Self-hosted option	No	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 As it's usually the case with Amazon, CodeBuild simply provides the 'build' part of a true CI/CD system, while pipelines are managed via CodePipeline, another Amazon product: https://aws.amazon.com/codepipeline/pricing/?nc=sn&loc=3	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.	Yes Offers minimal information built in, but allows integrations with tools such as CloudWatch (another Amazon product), or streaming build information to your own API, for more in-depth analysis.	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?	N/A	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.	No (partial) The environments available on CodeBuilt include Ruby pre-installed: https://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref-available.html, but that seems to be as far as specific support goes	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	No (partial) The environments available on CodeBuilt include Node pre-installed: https://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref-available.html, but that seems to be as far as specific support goes	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 CodeBuild builds can be connected to sources such as GitHub or BitBucket, but being an Amazon Service, the deepest integrations are with other Amazon Code services (CodePipeline, CodeDeploy, and others: https://aws.amazon.com/products/developer-tools/)	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	Yes Amazon SDKs can be used to interact with CodeBuild	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	Yes	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	Like most things Amazon, it becomes more valuable as you acquire and integrate various Amazon solutions, not necesarily as a standalone tool.	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	-

AWS CodeBuild vs Cirrus CI comparison of Continuous Integration servers What are the differences between AWS CodeBuild and Cirrus CI?

AWS CodeBuild

Cirrus CI

AWS integration

FreeBSD support

SaaS

SaaS / On Premise

Yes

Yes

Yes (partial)

Yes

Yes

N/A

N/A

Yes

N/A

N/A

Yes

Yes

Yes

Yes

Yes

N/A

No

Yes

Yes

Yes

Yes

Yes

Yes

N/A

N/A

N/A

No (partial)

No (partial)

No (partial)

No

Yes

Yes

Yes

Yes

Yes

N/A

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AWS CodeBuild vs Cirrus CI comparison of Continuous Integration servers
What are the differences between AWS CodeBuild and Cirrus CI?

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

How much can you save with faster tests
on AWS CodeBuild and Cirrus CI?