Cirrus CI vs Bamboo comparison of Continuous Integration servers

	Cirrus CI https://cirrus-ci.org	Bamboo https://www.atlassian.com/software/bamboo
Unique feature	FreeBSD support	Atlassian suite integration
Type of product	SaaS / On Premise	On Premise
Offers a free plan	Yes Free for open source projects	Yes The full Atlassian suite is free for open source projects (https://www.atlassian.com/software/views/open-source-license-request). For all others, they offer a minimal free trial.
Predictable pricing	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.	Yes They price their product based on number of build agents (more concurrency, more expensive). Given the notoriety and depth of the Atlassian suite, the pricing can be steep for small companies.
Support / SLA	N/A Not clear if they offer any real SLA on support.	Yes Dedicated tehnical 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 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	Yes Up to 100 parallel agents
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	Yes Agents can run on multiple machines.
Containers support / Build environment	Yes Allows containers or VMs for every major operating system.	Yes By default, they offer Docker support for the CI/CD job runners.
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	Yes Excellent dashboards, even more so thanks to integrations with the other tools in the Atlassian arsenal
Management support How easy is it to manage users / projects / assign roles and permissions and so on	N/A	Yes Great management support, built for large scale companies, even allows setting per-environment permissions (ie: QA team can only deploy to their own, isolated environment)
Self-hosted option	Yes	Yes
Hosted plans / SaaS	Yes	No
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 Defined via YML config files	Yes Advanced pipeline support - with features built for feature branch support, various triggers, schedules, external notifications and more.
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	Yes
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	Yes Large selection (~200) of apps that integrate with Bamboo, available on the official marketplace for Bamboo: https://marketplace.atlassian.com/addons/app/bamboo
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) No specific support from what I can gather, but it does provide documentation for Ruby, including integration with the knapsack_pro gem.	Yes (partial) It looks like the documentation and features for Ruby are lagging behind. All I could find is this repo: https://github.com/drscream/bamboozled-ruby-plugin, following this support ticket: https://jira.atlassian.com/browse/BAM-10948 from this documentation stub page: https://confluence.atlassian.com/bamboo0601/getting-started-with-ruby-and-bamboo-935580774.html
Specific language support: JavaScript	No No specific support and no documentation on setting up a CI/CD process for a Javascript project.	No No specific support, beyond some documentation on integrating Selenium (not marked as partial support since that documentation is only promoted in the Atlassian docs, but is hosted by BrowserStack)
Integrations 1st party support for common tools (like Slack notifications, various VCS platforms, etc)	Yes Integrates well with GitHub - the whole CI/CD process starts with a commit to a GitHub repo.	Yes Deep integration with the Atlassian product stack (Jira, etc.).
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 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	Yes
Auditing	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)	Yes
Additional notes	Seems to be used by companies with a solid engineering background (Google)	Not really something that should be purchased separatelly from the Atlassian stack.

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	-

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

Cirrus CI

Bamboo

FreeBSD support

Atlassian suite integration

SaaS / On Premise

On Premise

Yes

Yes

Yes

Yes

N/A

Yes

Yes

Yes

N/A

Yes

Yes

Yes

Yes

Yes

N/A

Yes

Yes

Yes

Yes

No

Yes

Yes

N/A

Yes

N/A

Yes

No (partial)

Yes (partial)

No

No

Yes

Yes

Yes

Yes

N/A

Yes

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

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

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