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Why You Probably Shouldn’t Build Test Automation In-House

Author: The MuukTest Team

Last updated: May 29, 2024

test automation in-house
Table of Contents

Test automation is a cornerstone of modern software development. It ensures applications are delivered promptly and accurately. By automating repetitive and extensive testing processes, companies can significantly enhance the efficiency and reliability of their software products. However, the decision to build test automation in-house might not be as advantageous as it seems. 

Despite the allure of tailoring test automation to the unique needs of a development team, this route may divert essential resources and focus from the core functionalities that drive business success. This article explores why organizations probably shouldn't build test automation in-house and which alternatives could better align with a team's objectives.



The Case Against In-House Development

Teams should avoid building test automation in-house because it is cost-prohibitive, extremely specific in its skill requirements, and can limit innovation.


Cost Considerations

The decision to develop test automation in-house versus purchasing from specialized vendors involves significant financial implications. Here are key areas where costs are impacted:

  • Developer Time and Resource Allocation: In-house development of test automation tools requires substantial commitment from your development team. This commitment includes the initial setup and diverting ongoing development efforts. For instance, a typical automation framework might take several months to develop, during which time your team could instead enhance existing product features or develop new revenue-generating services.
  • Initial Setup Costs: Setting up an in-house test automation framework involves costs related to software development tools, integration into existing systems, and possible developer training on new technologies or programming paradigms specific to testing. These setup phases often exceed initial budget estimates due to unforeseen technical challenges.
  • Ongoing Maintenance and Updates: Unlike static applications, test automation tools require continual updates to accommodate changes in the software they are testing. This includes adapting tests to new software features, fixing bugs in the automation code, and updating the tool to handle new testing scenarios. The cost of maintaining an in-house solution can significantly increase if the software development lifecycle is highly dynamic.
  • Opportunity Costs: In-house development also has an opportunity cost. The time and resources spent developing and maintaining test automation tools are not spent on potentially more valuable activities, such as improving user experience, expanding to new markets, or innovating on the core product.

Expertise and Focus

Test automation is a specialized area that requires a distinct skill set, often beyond the general software development skills typically found in product teams. Here are some of the skills essential for effective test automation:

  • Proficiency in Automation Frameworks: Skills in frameworks like Selenium, Appium, or Cypress are crucial. These tools require understanding the basic functionality and advanced features that allow for robust, scalable, and maintainable test scripts.
  • Scripting and Programming Skills: Effective test automation also demands strong coding skills in languages such as Python, Java, or JavaScript. These skills are necessary to develop scripts that are both efficient and capable of handling complex testing scenarios.
  • Continuous Integration/Continuous Deployment (CI/CD) Practices: Knowledge of CI/CD pipelines is essential, as test automation is critical to these processes. Understanding how to integrate automated tests into these pipelines ensures testing is a seamless part of the software delivery process.
  • Analytical and Debugging Skills: It is vital to be able to analyze test results, identify issues with the software, and debug test scripts. These skills help pinpoint failures in the software being tested quickly, thereby speeding up the development cycle.

Given the specialized nature of these skills, training existing staff or recruiting new talent can be costly and time-consuming. This specialization can divert resources and focus from core product development, where the existing team's domain expertise and understanding of the product's unique value propositions are more directly applicable.

By contrast, allowing developers to concentrate on enhancing the core functionalities of the product — those features that truly differentiate it in the market — can lead to more innovative and competitive offerings.


Vendor Support and Innovation

Opting for vendor-supplied test automation tools gives companies access to the latest features and innovations in the testing field without needing internal development. These vendors invest heavily in research and development to ensure their tools are at the forefront of technology trends and best practices. Additionally, the support provided by vendors is typically comprehensive and specialized, offering quick resolutions to any issues that arise, which can dramatically reduce downtime and improve efficiency.



Alternatives to In-House Development

Like the old saying goes, you don't have to reinvent the heel. There are many alternatives out there which may provide you with the solutions you need for your test automation. These alternatives, each with unique advantages and challenges, cater to different operational needs and resource allocations.


Open-Source Test Automation Frameworks

Open-source test automation frameworks are attractive to many companies due to their affordability and the robust support communities that back them. These frameworks are freely available and continually enhanced by a global community of developers and testers. However, deploying and maintaining these frameworks requires a certain level of expertise. Here are some key points to consider:


  • Cost-Effectiveness: Virtually no upfront costs, as these tools are freely available for modification and use.
  • Community Support: Large support communities provide updates and troubleshooting assistance, which can be invaluable for solving complex issues.
  • Continuous Improvement: Frequent updates and improvements from the community help keep the tools relevant and robust.


  • Expertise Required: Effective implementation requires coding and framework customization knowledge, which may necessitate training or hiring specialized personnel.
  • Customization Needs: While highly customizable, these frameworks require time and technical skills to tailor them to specific project requirements.

Commercial Test Automation Tools

Commercial test automation tools provide a more comprehensive solution with user-friendly interfaces facilitating quicker adoption and integration into existing workflows. These tools are designed to meet various testing needs and often come with extensive vendor support. However, they also present particular challenges and considerations:


  • Advanced Features: Include built-in best practices, advanced testing capabilities, and integration options with other software tools.
  • User-Friendly Interfaces: Typically easier for non-specialists to use, which can reduce training time and accelerate testing processes.
  • Vendor Support: Robust support, including troubleshooting, training, and regular updates that keep the tools aligned with current technologies.


  • Cost Implications: Higher ongoing costs due to subscription fees and possible additional costs for extra features or users.
  • Vendor Lock-In: Potential dependency on the vendor for updates and support can limit operational flexibility and future scalability.



Making the Right Choice

Selecting the right test automation strategy is crucial for companies to align with their project's needs and long-term goals.


Consider Your Project's Specific Needs and Budget

When assessing a project's requirements, determine the complexity of the tasks that require automation. This includes identifying frequent and critical test cases that benefit most from automation, like regression or load testing.

A detailed cost-benefit analysis should follow, comparing the expense of developing these capabilities in-house versus the costs associated with purchasing or licensing third-party solutions. Budget considerations should also account for potential scalability needs, foreseeing future expansions that may necessitate more sophisticated testing frameworks.


Evaluate the Trade-offs Between Cost, Expertise, and Ongoing Support

Decision-makers must carefully evaluate the cost implications, not just upfront but over the life cycle of the test automation implementation. This evaluation includes considering the cost of training staff on new tools versus utilizing existing skill sets. If the current team lacks experience in advanced test automation practices, the learning curve and the time to productivity must be factored into the decision.

Ongoing support is another critical consideration. External vendors typically offer robust support services, software updates, and system maintenance, which can offset internal resource demands and reduce the total cost of ownership.


Look for a Balance Between Customization and Ease of Use

Customization allows companies to tailor test automation tools to their needs, leading to more efficient testing cycles and more relevant results. However, highly customized solutions can become complex and require continuous updates and checks.

On the other hand, standardized, off-the-shelf software solutions offer ease of use, faster setup times, and lower maintenance requirements. The ideal solution often lies in a hybrid approach, utilizing customizable yet user-friendly platforms that provide the flexibility to adapt to changing needs without extensive additional investment. Tools that offer modular customization options, allowing for incremental adjustments, can be particularly beneficial.



Test Automation: Final Thoughts

A well-defined testing strategy is critical for any software development project, ensuring products not only meet the required standards but also deliver the best possible user experience. While building test automation in-house may seem attractive for those seeking complete control and customization, companies should consider all available options. This evaluation helps to align their specific needs with the most effective testing solution, whether it involves buying, building, or a blend of both.

In some scenarios, in-house test automation development could be a good fit. Companies with highly specialized needs that existing tools cannot adequately address, or those where security and data privacy are paramount, may benefit from tailor-made solutions. Additionally, organizations that already possess a strong internal team of test automation experts might find their in-house skills could lead to competitive innovations.

Ultimately, the decision to build or buy should not be taken lightly. It involves a thorough analysis of the company's immediate and long-term needs, available resources, and strategic goals.



Contact Us Today

We invite you to share your experiences with test automation. Whether you've built in-house solutions, leveraged open-source frameworks, or employed commercial tools, your insights can help others in the community make informed decisions. Join the discussion below and let us know how test automation has impacted your projects.

We offer a range of resources for those seeking to deepen their understanding of test automation strategies and tools. To access more articles on topics like this, visit our blog, or check out our case studies, to get more expert advice designed to enhance your testing processes and ensure the success of your software development efforts.