Bamboo vs Semaphore CI comparison of Continuous Integration servers

	Bamboo https://www.atlassian.com/software/bamboo	Semaphore CI https://semaphoreci.com
Unique feature	Atlassian suite integration	Autoscaling made easy / Great CLI
Type of product	On Premise	SaaS
Offers a free plan	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.	Yes 1,300 service minutes every month. Plans to release a free tier for open source projects.
Predictable pricing	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.	Yes Semaphore doesn't have traditional pricing tiers, instead it lists the types of machines you can use and their pricing per second of service. They plan to release an annual plan at some point.
Support / SLA	Yes Dedicated tehnical 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 Up to 100 parallel agents	Yes Allows defining a custom build matrix such that your build can be parallelized accross several different environments.
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	Yes Agents can run on multiple machines.	N/A
Containers support / Build environment	Yes By default, they offer Docker support for the CI/CD job runners.	Yes Allows running builds inside docker containers
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 Excellent dashboards, even more so thanks to integrations with the other tools in the Atlassian arsenal	Yes
Management support How easy is it to manage users / projects / assign roles and permissions and so on	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)	Yes
Self-hosted option	Yes	No
Hosted plans / SaaS	No	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 Advanced pipeline support - with features built for feature branch support, various triggers, schedules, external notifications and more.	Yes Allows defining complex build workflows with ease
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	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 Large selection (~200) of apps that integrate with Bamboo, available on the official marketplace for Bamboo: https://marketplace.atlassian.com/addons/app/bamboo	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 (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	Yes Provides rich documentation on integrating Semaphore CI in Ruby projects. Also provides sudo access if you need to install system dependencies or C extensions.
Specific language support: JavaScript	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)	Yes Provides rich documentation on integrating Semaphore CI in Javascript projects
Integrations 1st party support for common tools (like Slack notifications, various VCS platforms, etc)	Yes Deep integration with the Atlassian product stack (Jira, etc.).	Yes Integration with GitHub and Slack. They allow building iOS projects via their macOS Mojave VM image.
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	No
Auditing	Yes	Yes
Additional notes	Not really something that should be purchased separatelly from the Atlassian stack.	List of features is based on Semaphore 2.0

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	-

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

Bamboo

Semaphore CI

Atlassian suite integration

Autoscaling made easy / Great CLI

On Premise

SaaS

Yes

Yes

Yes

Yes

Yes

N/A

Yes

Yes

Yes

N/A

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

Yes

Yes

Yes

Yes

N/A

Yes

N/A

Yes (partial)

Yes

No

Yes

Yes

Yes

Yes

No

Yes

Yes

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

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

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