15 Best Continuous Integration Tools in 2021 (Compared)

Comparison of the best paid and free open source Continuous Integration (CI) Tools in 2021: 

What is Continuous Integration?

CI is a method that enhances the quality of the code. It is a software engineering method that merges all developers working copies in a shared manner and environment.

It isolates the changes that are done immediately and report at the same time whenever they are added to a larger code base. 

The main objective of Continuous Integration is to provide rapid feedback when any defect is found in the code base and correct it as soon as possible. It automates the testing process on a server and provides automatic reporting to the user.


We listed some of the most popular Open Source DevOps Tools in our last DevOps tutorial series.

The Plan, Code, Build, and Test are the workflows or common steps of the CI process. This sequence of steps is called a pipeline. Each tool uses these steps or some extra steps for processing.

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Top Continuous Integration Tools

Here is a list of top 15 tools that includes the most popular paid as well as free open source CI tools.

  • Buddy
  • Jenkins
  • ThoughtWorks
  • Urbancode deploy
  • Jenkins
  • Perforce
  • Bamboo
  • Hudson
  • TeamCity
  • Circle CI
  • Codeship
  • Cruise control
  • Go
  • Travis
  • Integrity
  • Strider

Here is the detailed review of each tool.

#1) Buddy

Buddy logo

Buddy is a smart CI/CD tool for web developers designed to lower the entry threshold to DevOps. It uses delivery pipelines to build, test and deploy software. The pipelines are created with over 100 ready-to-use actions that can be arranged in any way – just like you build a house of bricks.

  • 15-minute configuration in clear & telling UI/UX
  • Lightning-fast deployments based on changesets
  • Builds are run in isolated containers with cached dependencies
  • Supports all popular languages, frameworks & task managers
  • Dedicated roster of Docker/Kubernetes actions
  • Integrates with AWS, Google, DigitalOcean, Azure, Shopify, WordPress & more
  • Supports parallelism & YAML configuration

=> Visit Buddy Website

#2) Jenkins

Continuous integration tool 4

Jenkins is a cross-platform, Continuous Integration tool that builds and test software projects continuously. Jenkins is developed in Java programming languages that provide real-time testing and reporting. It makes easy for the developer to integrate changes to the projects. It provides different ways of building a pipeline and integration with many testing and deployment methodology.

Easy installation and configuration are features of the Jenkins through which developers can deploy it in a servlet container. The Rich plugin is another feature that integrates with virtually every existing software configuration management [SCM] or builds tool. Jenkins easily extends and modifies the new plugins.

 Download link: Jenkins

#3) Buildbot

Continuous integration tool 1

Buildbot is a top tool, developed in Python and supports the twisted framework. Buildbot is an open source framework that automates all processes of complex testing and application deployment. The reason for this popularity of this tool is that it supports the distributed and parallel execution of process across different platform.

In simple word, it is based on the job scheduling system where is any resources are available it executes the job and generate the test report. In addition, its configuration is based on the master-slaves system where master monitors the changes and gives reports to the user or developer. This configuration enhances its integrity with another open source framework like Twisted, Webkit, Firefox, Chromium.

 Download link: Buildbot

#4) ThoughtWorks

Continuous integration tool 2

ThoughtWorks is the top company that provides CI features. ThoughtWorks’s integrates the code, at least daily, and detects problems easily and quickly. This reduces the backtracking time for finding any error and developer can use that time for designing any feature.

ThoughtWorks’s increases the visibility so that user easily communicates and sees what is happening. It also uses only a single source repository. It automates the deployment process and builds self-testing very fast.

 Download link: ThoughtWorks

#5) Urbancode deploy

Continuous integration tool 3

Urbancode deploy is a multi-tier application model or product of IBM. It provides continuous delivery, self-service, rapid feedback and incremental updates in the agile environment, and automates the application deployments in a consistent manner. Developers can also roll back the applications, organizes the changes across servers, tiers, and components.

In addition, it provides audit trails, versioning etc. With the help of clear visibility feature, developers and users can see what is deployed, where it is done, and who are doing this. Urbancode deploys easily integrates with the middleware projects and provides server virtualization.

Download link: Urbancode deploy

#6) Perforce Helix

Continuous integration tool 5

Perforce Helix is a uniform, open, and flexible platform for CI that supports all documented APIs. The tool has so many different features. A powerful versioning engine feature of Helix manage and secure any type and size of the file. It supports all types of apps, so anyone can use according to their need.

The collaboration interface of all review, comments, decisions completed through Helix Swarm. The GitSwarm ecosystem feature performs access control and synchronizes a mainline repository. It easily detects any threat and predicts risk and find out the impacts of that risk or threat in a few seconds. The helix is available for a free, starter pack, or subscription based.

Download link: Perforce Helix

#7) Bamboo

Continuous integration tool 6

Bamboo is a CI build server that performs the automatic build, test, and releases in a single place. It easily works with JIRA software and Bitbucket. Bamboo supports any type of languages and technologies such as CodeDeply, Ducker, Maven, Git, SVN, Mercurial, Ant, AWS, Amazon S3 buckets.

In addition, Bamboo identifies the new branches into these technologies and automatically applies to the customization of triggers and variables. The deployment and automation of Bamboo are very fast and easy. It is available for a free trial.

 Download link: Bamboo

#8) Hudson

Continuous integration tool 7

Hudson builds and tests software projects continuously. It monitors and executes externally-run jobs. Like any other tool, it also has many features. Installation of Hudson is very easy and has a very user-friendly graphical user interface. It can support Changeset that generates the lists of changes into from SCM systems.

Permanent link features provide clean, readable URLs. User or developer can monitor and builds results by email or RSS. In addition, they can tag this builds after its completion, supports extensibility, and distributed computer processing.

 Download link: Hudson

#9) TeamCity

Continuous integration tool 8

TeamCity is an intelligent CI server that supports many features. Automatic framework and configuration of the tool performs code coverage, code analysis, avoids code duplication and many more. TeamCity store or backup the all changes, failures and build for future reference.

TeamCity supports the cloud integration with the integration of many cloud technologies like Microsoft Azure, VMware etc. Developers or users can extend the server according to the need and creates any plugin using open APIs. It is a free CI tool.

Download link: TeamCity

#10) Circle CI

Continuous integration tool 9

CircleCI is another flexible tool that runs in an environment such as cross-platform mobile app, Python API server or Docker cluster. A scalable tool reduces bugs and improves the quality of the application. It can take data from multiple projects using the granular check out key options of the CircleCI.

Language independent automatically uses language-specific tools that are installed in an isolated environment. CircleCI uses the build, test, debug and deploy steps for the continuous integration process and last it generates notifications. First-time use of CircleCI is free and after that, we have to pay to use it.

 Download link: Circle CI

#11) Codeship

Continuous integration tool 10

Courtship is a powerful tool that automates the development and deployment workflow. Codeship triggers this automated workflow by simply pushing to the repository. Parallel run of tests is completed with the ParallelCI feature of CircleCI.

CircleCI configures the deployment pipelines in multiple environments. It provides an organization that manages the team and streamlines the projects. It supports and integrates powerful technologies, languages, deployment, and databases. Personal and organizational are different pricing plan for using Codeship.

Download link: Codeship

#12) Cruise control

Continuous integration tool 11

CruiseControl is a tool with the extensible framework. It is written in Java language but can be used on the different type of projects. It supports many plugins for many different source controls, builds technologies, notification schemes, and instant messaging.

CruiseControl has the web-based user-friendly interface that provides details of the current and previous builds. It also supports third-party tools. It is an OSI certified open source software and distributed under a BSD license so anyone can free download its source code.

Download link: Cruise control

#13) Go/GoCD

Continuous integration tool 12

GoCD or Go is a product of ThoughtWorks. GoCD is an open continuous framework that automates the testing process. The new features of the tool are that it removes the file-handle leak bug where windows agents cannot clean up properly and fix the OOM on agents when parsing large xml test artifacts. Go’s pipelines are the feature based on fan-in/fan-out dependency management that easily configure the dependencies.

Each pipeline of the Go defines the particular changeset means it passes the binaries between stages. The user can track any changes using the Value Stream Map feature of Go. Manual triggers of Go deploy any version of the application and increase the reliability of production. It also executes the test in many languages and generates the test report.

Download link:  Go/GoCD

#14) Travis

Continuous integration tool 13

Travis CI is a popular open source tool for testing. Developer or tester can easily synchronize Travis CI with GitHub and performs the testing. It has each type of private repository plans for every size project. It supports many languages and platforms like Linux, Mac or iOS.

In Travis, the user can see everything during testing. It also performs parallel test runs using their great APIs and command line tools. It supports pull request and branch build flow.

Download link: Travis

#15) Integrity

Continuous integration tool 14

Integrity is a CI server that works only with GitHub. Users can use other SCM tools with Integrity by using mirror repositories means GitHub mirror other SCM and then Integrity can use it. For this, users have to update the mirrored repositories continuously.

Integrity is built on Ruby. Whenever users commit the codes, then Integrity builds and runs the code. After that, it generates reports and provides notifications to the user.

Download link: Integrity

#16) Strider or Strider CD

Continuous integration tool 15

Strider is an open source CI/CD platform. It is written in Node.JS/JavaScript and uses MongoDB. It is published under the BSD license. It supports different plugins that modify the database schema & user interface and register HTTP routes.

An extensible framework trigger builds and deployments. It is integrated with many projects like GitHub, BitBucket, Gitlab etc. VCS branches, Github pull requests, collaborators features make it so easy for processing.

Download link: Strider or Strider CD

#17) AppVeyor

Continuous integration tool 16

AppVeyor is an open source CI build server in a cloud environment. AppVeyor does not require any setup for installation with zero maintenance. User-interface and YAML make it developer friendly build config. It has isolated build worker for every build that is multi branches.

First class supports, pay per use, built-in deployment and vibrant communicate are some special features of the Appleyard. It is free for open source projects with 14-days free trial for basic, pro, and premium plans.

Download link: AppVeyor

#17) Solano

Continuous integration tool 17

Solano Labs is also a CI/CD tool that works as a SaaS [Software as a service] manner of cloud computing. Using Solano, the user can use many languages and framework for writing their code and testing. It can be integrated with other projects like Github.

In Solano, more than one test can be run parallel using Auto-parallelism feature of the tool. It has a simple dashboard through which users can easily see every process. It is available for 14-days free trial with different plans.

Download link: Solano

#18) Semaphore

Continuous integration tool 18

Semaphore has many features compared to the other tools. Project timeline shows every activity of the testing. It supports many languages, framework and can be integrated with Github. It performs automatic testing and deployment. Using collaboration, users can invite other collaborators that are all copied from Github.

Semaphore has also parallelism feature that runs more than one test. In addition, it requires only one account for a single organization and does not require any configuration file for writing that increases its speed of processing. It is available with paid organizational and personal plans.

Download link: Semaphore

#19) AutoRabit

Continuous integration tool 19

AutoRABIT is a cloud-based CI framework. It has a salesforce release management that automatically performs the test, builds, and deploy. It can adopt any changes. Sandbox management is a major feature of this tool. It supports scheduled and metadata migration.

AutoRABIT has strong version control and integration with Github, Subversion, Perforce, and TFS. It can easily synchronize with the geographically distributed environment. Record and playback of functional scenario with Selenium is the unique feature of this tool that is done by the test automation factory. It is available for 14-days free trial.

Download link: AutoRabit

#20) Team Foundation Server

Continuous integration tool 20

A Team Foundation Server is a collaborative tool that consists of the code repositories, continuous integration, and the bug or task tracking. It is a product of Microsoft. It supports many languages such as Java, Python, HTML, C# and many more.

It can work in any environment like Visual Studio, Xcode, Eclipse, or any Git client. An open and extensible tool can work effectively for all shapes and sizes. It is available with free downloading.

Download link: Team Foundation Server

#21) Final builder

Continuous integration tool 21

The Final builder has a great logical structure graphical interface that is easy to use. Users can handle all the loops and conditional statements by try & catch the actions of the Final builder. It has an extensive feature set that includes pre-written actions above 600.

The Final builder provides scheduled builds to run test daily, weekly etc. Version control integration, detailed logging, script supporting, and integrating debugging are some major features of the Final builder. It is available with the paid professional and standard edition.

Download link: Final builder

#22) Wercker

Continuous integration tool 22

The Wercker tool automates builds and deploys the container. It creates a unique automated pipeline (build and deploy pipelines) that are executed through the command line interface. It provides the micro-services mean it triggers the pipelines whenever any new code is committed.

Wercker’s Docker stack performs processing very fast and avoids any threat or error. It isolates the applications and services from the operating system. To use Wercker, users can use either a free plan or virtual private cloud plan.

Download link: Wercker

#23) Buildkite

Continuous integration tool 23

Buildkite supports many languages, environment, or toolchain. It automates the entire workflow of continuous integration and speeds up the testing process. Users can install it on any platform such as Windows, Linux, or Mac. Buildkite is a scalable tool means users can add the build agent according to their need.

Like another tool, it can integrate with GitHub, Bitbucket, GitLab, Codebase, and GitHub Enterprise. Trigger via the web, build scripts, easy setup, beautiful build output are some of the features of Buildkite. It is available with 14-days free trial and user can subscribe it.

Download link: Buildkite

#24) Drone

Continuous integration tool 24

A Drone is a hosted CI service tool integrated with Github, Google code, and Bitbucket that makes its setup easy. It supports many browser testing that includes Firefox, Chrome, and Xvfb.

Drone integrates custom deployment with Amazon, Heroku, Google App Engine and many more. It supports many languages such as C, C++, Java, Node.js and more. Users can use Drone for open source project but have to pay for business users using different plans.

Download link: Drone


In the above list, we have included almost all the top CI tools. We have compared these Continuous Integration tools based on the features, pricing and other information available online.

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Also Read => Top Continuous Delivery Tools

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