Knapsack Pro

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

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.

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