Semaphore CI vs TeamCity comparison of Continuous Integration servers

	Semaphore CI https://semaphoreci.com	TeamCity https://www.jetbrains.com/teamcity/
Unique feature	Autoscaling made easy / Great CLI	Technology awareness
Type of product	SaaS	On Premise
Offers a free plan	Yes 1,300 service minutes every month. Plans to release a free tier for open source projects.	Yes They offer a great free professional plan, limited to 100 build configurations and 3 build agents. From there, you pay for each aditional agent you want (discounts if you purchase more than 1 agent at a time). They also provide a free plan for open source, non commercial projects, and steep 50% discounts for startups.
Predictable pricing	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.	Yes They have a clear list of prices per number of agents.
Support / SLA	N/A Not clear if they offer any real SLA on support.	Yes
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 Allows defining a custom build matrix such that your build can be parallelized accross several different environments.	Yes
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 No specific mention that we could find, but judging by the wording used it would appear that tasks can be divided accross different machines.
Containers support / Build environment	Yes Allows running builds inside docker containers	Yes First class Docker support, among others
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 Great system overview, even allows building your own dashboards in order to see everything you're interested in at a glance.
Management support How easy is it to manage users / projects / assign roles and permissions and so on	Yes	Yes Allows assigning roles, LDAP and Windows domain integrations and more.
Self-hosted option	No	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 Allows defining complex build workflows with ease	Yes Unlike most options in the CI/CD space, TeamCity allows defining pipelines using a Kotlin-based DSL. This unlocks a lot of potential, such as templates for common CI/CD tasks, and deep integration with various IDEs (not just JetBrains IDEs)
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 Something that stands out from the rest, allows integrating third party reports, as long as they produce HTML output.
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 JetBrains has a rich ecosystem of plugins in general.
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 Provides rich documentation on integrating Semaphore CI in Ruby projects. Also provides sudo access if you need to install system dependencies or C extensions.	Yes Using what they call 'Technology Awareness', promises great intehration with Ruby projects, with features such as testing framework support, static analysis and code coverage available out of the box, with no additional work required: https://www.jetbrains.com/teamcity/features/technology_awareness.html
Specific language support: JavaScript	Yes Provides rich documentation on integrating Semaphore CI in Javascript projects	No (partial) Unlike Ruby, there's no first class support for Javascript, although they do advertise the fact that their large collections of plugins can cover any use case for Javascript projects: https://plugins.jetbrains.com/teamcity
Integrations 1st party support for common tools (like Slack notifications, various VCS platforms, etc)	Yes Integration with GitHub and Slack. They allow building iOS projects via their macOS Mojave VM image.	Yes Great cloud integrations (Google Cloud, AWS, VMWare, etc) as well as 'key' integrations (VSCode, Jira, even NuGet)
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	No	Yes Unlike most tools, which offer just a Rest API, TeamCity provides ample opportunity for extension via plugins, their own API, and service messages (formatted messages on stdout)
Auditing	Yes	Yes
Additional notes	List of features is based on Semaphore 2.0	Great ecosystem, with a strong focus on integration with other tools (not only JetBrains).

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	-

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

Semaphore CI

TeamCity

Autoscaling made easy / Great CLI

Technology awareness

SaaS

On Premise

Yes

Yes

Yes

Yes

N/A

Yes

Yes

Yes

N/A

N/A

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

No

Yes

Yes

N/A

Yes

N/A

Yes

Yes

Yes

Yes

No (partial)

Yes

Yes

No

Yes

Yes

Yes

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

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

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