List of the Top 22 Code Coverage Tools for C in 2025

Parasoft aims to deliver automated testing tools and knowledge that enable companies to accelerate the launch of secure and dependable software. Parasoft C/C++test serves as a comprehensive test automation platform for C and C++, offering capabilities for static analysis, unit testing, and structural code coverage, thereby assisting organizations in meeting stringent industry standards for functional safety and security in embedded software applications. This robust solution not only enhances code quality but also streamlines the development process, ensuring that software is both effective and compliant with necessary regulations.

Introducing the latest iteration of Xcode, version 12, which presents a modernized interface that aligns beautifully with macOS Big Sur. This updated version includes adjustable font sizes for the navigator, enhanced code completion capabilities, and a new approach to document tabs that collectively improve both the efficiency and aesthetics of coding. Notably, Xcode 12 is designed to generate Universal apps that operate flawlessly on Apple Silicon Macs without necessitating any modifications to the codebase. The layout has been specifically refined for macOS Big Sur, showcasing a sidebar in the navigator that stretches to the top of the window, along with clearly defined toolbar buttons that elevate usability. Users will appreciate the larger default font, which significantly boosts readability, while also offering a range of size options to cater to individual preferences. The innovative document tabs feature allows developers to maintain better organization of their projects, promoting a more streamlined workflow. Users can quickly open new tabs with a simple double-click and easily track files as they move through their projects. Additionally, these document tabs can be rearranged to create an organized collection of relevant files, with the added flexibility for customizing how each tab displays its content to maximize productivity. Ultimately, Xcode 12 is designed to significantly improve the overall development experience through its user-centric design and thoughtful features, making it an indispensable tool for developers.

Boost your efficiency by ensuring that only top-notch code is deployed, as SonarQube Cloud (formerly known as SonarCloud) effortlessly assesses branches and enhances pull requests with valuable insights. Detecting subtle bugs is crucial to preventing erratic behavior that could negatively impact users, while also addressing security vulnerabilities that pose a risk to your application, all while deepening your understanding of application security through the Security Hotspots feature. You can quickly start utilizing the platform directly from your coding environment, allowing you to take advantage of immediate access to the latest features and enhancements. Project dashboards deliver essential insights into code quality and release readiness, ensuring that both teams and stakeholders are well-informed. Displaying project badges highlights your dedication to excellence within your communities and serves as a testament to your commitment to quality. Recognizing that code quality and security are vital throughout your entire technology stack—covering both front-end and back-end development—we support an extensive selection of 24 programming languages, including Python, Java, C++, and more. As the call for transparency in coding practices increases, we encourage you to join this movement; it's entirely free for open-source projects, presenting a valuable opportunity for all developers! Additionally, by engaging with this initiative, you play a role in a broader community focused on elevating software quality and fostering collaboration among developers. Embrace this chance to enhance your skills while contributing to a collective mission of excellence.

Improve your coding standards and enhance the efficacy of your code review process by embracing better coding habits. Codecov provides an array of integrated tools that facilitate the organization, merging, archiving, and comparison of coverage reports in a cohesive manner. For open-source initiatives, this service is available at no cost, while paid options start as low as $10 per user each month. It accommodates a variety of programming languages, such as Ruby, Python, C++, and JavaScript, and can be easily incorporated into any continuous integration (CI) workflow with minimal setup required. The platform automates the merging of reports from all CI systems and languages into a single cohesive document. Users benefit from customized status notifications regarding different coverage metrics and have access to reports categorized by project, directory, and test type—be it unit tests or integration tests. Furthermore, insightful comments on the coverage reports are seamlessly integrated into your pull requests. With a commitment to protecting your information and systems, Codecov boasts SOC 2 Type II certification, affirming that their security protocols have been thoroughly evaluated by an independent third party. By leveraging these tools, development teams can substantially enhance code quality and optimize their workflows, ultimately leading to more robust software outcomes. As a result, adopting such advanced tools not only fosters a healthier coding environment but also encourages collaboration among team members.

Simplifying unit testing allows you to create tests without altering your current codebase, which includes older systems. This functionality extends to static methods, private methods, non-virtual methods, out parameters, as well as class members and fields. For developers around the world, our professional edition is accessible at no charge and comes with options for additional paid support. By improving your code's integrity, you can reliably generate high-quality software. With a single command, you can build complete object models, which empowers you to mock static methods, private methods, constructors, events, LINQ queries, reference arguments, and other elements, whether they are currently in use or planned for the future. The automated test suggestion feature provides tailored recommendations for your specific code, while our smart test runner focuses on executing only the tests that have been affected, allowing for swift feedback. Furthermore, our coverage tool lets you monitor your code coverage right within your development environment, which helps you stay updated on your testing efforts. This all-encompassing strategy not only conserves time but also greatly improves the overall trustworthiness of your software, ensuring that it meets user expectations consistently. By focusing on these elements, you can foster a development environment that prioritizes quality and efficiency.

Debugging ought to be a simple task, and AQTime Pro excels at converting complex memory and performance metrics into understandable, actionable insights, facilitating the swift detection of bugs and their root causes. Although finding and fixing unique bugs can often be tedious and complicated, AQTime Pro effectively alleviates this burden. Featuring an array of more than a dozen profilers, it allows users to easily pinpoint memory leaks, performance problems, and issues with code coverage through just a few clicks. This robust tool equips developers to efficiently eradicate all kinds of bugs, thereby allowing them to concentrate on creating high-quality code. Avoid letting profiling tools restrict you to a singular codebase or framework, as this can limit your ability to identify performance issues, memory leaks, and code coverage shortcomings specific to your work. AQTime Pro distinguishes itself as a flexible solution suitable for various codebases and frameworks within a single project, making it a top choice for diverse development needs. Its broad language compatibility encompasses widely-used programming languages like C/C++, Delphi, .NET, Java, and others, proving to be an essential resource in varied development settings. By integrating AQTime Pro into your workflow, you can not only optimize your debugging tasks but also significantly boost your overall coding productivity. Ultimately, this tool represents a game-changer for developers seeking to refine their debugging efforts and achieve greater efficiency in their coding projects.

Coco® is an adaptable tool created to gauge code coverage across a variety of programming languages. By employing automatic instrumentation of source code, it evaluates the coverage of statements, branches, and conditions throughout the testing process. When the instrumented application undergoes testing, it produces data that can later be analyzed in-depth. This analysis allows developers to understand how much of the source code has been tested, recognize areas lacking coverage, decide which additional tests are required, and monitor changes in coverage over time. Furthermore, it assists in identifying redundant tests and locating untested or outdated code sections. By assessing the impact of patches on both the codebase and the overall coverage, Coco offers a detailed perspective on testing effectiveness. It accommodates various coverage metrics, such as statement coverage, branch coverage, and Modified Condition/Decision Coverage (MC/DC), which makes it suitable for a range of environments including Linux, Windows, and real-time operating systems. Additionally, the tool is compatible with several compilers, including GCC, Visual Studio, and embedded compilers, providing flexibility for developers. Users can select from multiple report formats like text, HTML, XML, JUnit, and Cobertura to meet their specific requirements. Moreover, Coco easily integrates with numerous build, testing, and continuous integration frameworks, such as JUnit, Jenkins, and SonarQube, thereby enhancing its functionality within a developer's workflow. This extensive array of features positions Coco as an invaluable resource for teams dedicated to delivering high-quality software through robust testing methodologies, ensuring that every aspect of the code is thoroughly examined. Ultimately, Coco empowers developers to optimize their testing processes to achieve the best outcomes.

With a wide range of tools and APIs provided by top cloud service providers, creating services in Go has become more straightforward than ever. The language boasts a rich set of open-source libraries, alongside its robust standard library, making it an excellent choice for developing quick and advanced command-line interfaces. Go's impressive memory management and support for various integrated development environments further bolster its ability to power fast and scalable web applications. Additionally, its rapid compilation speed and clean syntax, coupled with built-in documentation and formatting features, are specifically designed to cater to the needs of DevOps experts and site reliability engineers. This discussion delves deeply into all aspects of Go. Whether you are starting a new project or aiming to enhance your existing Go expertise, a well-structured interactive introduction is available, divided into three distinct parts. Each segment includes practical exercises that reinforce your learning, while the Playground feature enables users to write and execute Go code directly within a browser, with immediate compilation and linking occurring on our servers. This interactive learning method not only makes mastering Go effective but also turns the process into an enjoyable experience. Furthermore, the community surrounding Go offers valuable resources and support, enriching your journey as you explore this powerful programming language.

This module presents metrics specifically designed for code coverage in Perl, illustrating the degree to which tests interact with the codebase. By employing Devel::Cover, developers can pinpoint areas of their code that lack tests and determine which additional tests are needed to improve overall coverage. In essence, code coverage acts as a useful proxy for assessing software quality. Devel::Cover has achieved a notable level of reliability, offering a variety of features characteristic of effective coverage tools. It generates comprehensive reports detailing statement, branch, condition, subroutine, and pod coverage. Typically, the information regarding statement and subroutine coverage is trustworthy, although branch and condition coverage might not always meet expectations. For pod coverage, it utilizes Pod::Coverage, and if the Pod::Coverage::CountParents module is available, it will draw on that for more thorough analysis. Additionally, the insights provided by Devel::Cover can significantly guide developers in refining their testing strategies, making it a vital resource for enhancing the robustness of Perl applications. Ultimately, Devel::Cover proves to be an invaluable asset for Perl developers striving to elevate the quality of their code through improved testing methodologies.

grcov is a utility designed to collect and unify code coverage information from multiple source files. It can effectively process .profraw and .gcda files generated by llvm/clang or gcc compilers. Furthermore, grcov supports lcov files for JavaScript coverage along with JaCoCo files for Java projects. This adaptable tool works seamlessly across various operating systems such as Linux, macOS, and Windows, ensuring that developers from diverse environments can utilize it. By leveraging its capabilities, teams can significantly improve their analysis of code quality and test coverage, leading to better software outcomes. Its broad compatibility and robust functionality make it an essential asset for any development workflow.

Various operating systems, including Linux, Windows, and real-time operating systems (RTOS), are employed alongside compilers such as gcc, Visual Studio, and numerous embedded alternatives. By merging multiple execution reports, users can gain deeper insights and access a suite of advanced features. Furthermore, Coco's built-in Function Profiler facilitates the assessment and enhancement of code performance, enabling developers to optimize their applications with precision. This extensive array of tools not only bolsters programming capabilities but also inspires innovation in software development practices. Ultimately, such resources allow programmers to significantly improve their coding productivity and effectiveness.

Codacy serves as an automated tool for code reviews, utilizing static code analysis to pinpoint issues, which in turn enables engineering teams to conserve time and address technical debt effectively. By integrating effortlessly with existing workflows on various Git providers, as well as platforms like Slack and JIRA through Webhooks, Codacy ensures that teams receive timely notifications regarding security vulnerabilities, code coverage, duplicate code, and the complexity of code with each commit and pull request. Additionally, the tool offers advanced metrics that shed light on the overall health of projects, team performance, and other key indicators. With the Codacy Command Line Interface (CLI), teams can perform code analysis locally, allowing them to access results without having to navigate to their Git provider or the Codacy web application. Supporting over 30 programming languages, Codacy is available in both free and enterprise versions, whether in the cloud or self-hosted, making it a versatile solution for various development environments. For more information and to explore its features, visit https://www.codacy.com/. Furthermore, adopting Codacy can significantly streamline your development process and enhance collaboration among team members.

The LDRA tool suite represents the foremost offering from LDRA, delivering a flexible and comprehensive framework that integrates quality assurance into the software development lifecycle, starting from the requirements gathering stage and extending to actual deployment. This suite features an extensive array of functions, including traceability of requirements, test management, compliance with coding standards, assessment of code quality, analysis of code coverage, and evaluations of both data-flow and control-flow, in addition to unit, integration, and target testing, as well as support for certification and adherence to regulatory standards. The key elements of this suite are available in diverse configurations designed to cater to various software development needs. Moreover, a multitude of additional features is provided to tailor the solution to the specific requirements of individual projects. Central to this suite is the LDRA Testbed in conjunction with TBvision, which furnishes a powerful blend of static and dynamic analysis tools, accompanied by a visualization interface that facilitates the comprehension and navigation of standards compliance, quality metrics, and code coverage analyses. This all-encompassing toolset not only improves the overall quality of software but also optimizes the development process for teams striving for exceptional results in their initiatives, thereby ensuring a more efficient workflow and higher productivity levels in software projects.

Testwell CTC++ is a sophisticated tool designed for instrumentation-based code coverage and dynamic analysis tailored for C and C++ languages. By adding supplementary components, it can also adapt its capabilities for languages like C#, Java, and Objective-C. Furthermore, with the inclusion of extra add-ons, CTC++ possesses the ability to analyze code across a diverse array of embedded target systems, even those with very restricted resources, such as limited memory and no operating system. This tool provides an array of coverage metrics, including Line Coverage, Statement Coverage, Function Coverage, Decision Coverage, Multicondition Coverage, Modified Condition/Decision Coverage (MC/DC), and Condition Coverage. As a dynamic analysis instrument, it offers comprehensive execution counters that reveal the frequency of code execution, which provides more insight than basic executed/not executed data. In addition, CTC++ allows users to evaluate function execution costs, usually in terms of processing time, and enables tracing for function entry and exit during testing. The intuitive interface of CTC++ ensures that it remains easy to use for developers in search of effective analysis tools. Its adaptability and extensive capabilities make it an essential resource for projects of all sizes, ensuring that developers can optimize their code effectively. Ultimately, the combination of detailed insights and user-friendliness positions CTC++ as a standout choice in the realm of software quality assurance.

Gcov serves as an open-source tool designed to measure code coverage effectively. By revealing which segments of code are executed while tests run, it enables developers to enhance their optimization processes and improve debugging efforts. This analysis not only aids in identifying untested areas but also fosters a more efficient development cycle.

BullseyeCoverage is a cutting-edge solution tailored for C++ code coverage, focused on improving software quality across vital industries such as enterprise applications, healthcare, automotive, telecommunications, industrial automation, and aerospace and defense. The function coverage metric provides developers with a quick overview of testing effectiveness and identifies untested areas, which is crucial for enhancing overall project coverage. Additionally, the condition/decision coverage metric delves deeper into the control structure, allowing developers to pinpoint specific improvements, particularly during unit testing processes. When compared to the more basic statement or branch coverage, condition/decision coverage offers greater detail and significantly enhances productivity, making it a superior option for developers aiming for comprehensive testing outcomes. By utilizing these advanced metrics, teams can achieve high levels of software robustness and reliability, ensuring they meet the stringent standards expected in critical application domains. Ultimately, the adoption of BullseyeCoverage empowers teams to deliver high-quality software solutions that can stand up to the demands of their respective industries.

Coverage.py is an invaluable tool designed to measure the code coverage of Python applications. It monitors the program's execution, documenting which parts of the code are activated while identifying sections that could have been run but were not. This coverage measurement is essential for assessing the effectiveness of testing strategies. It reveals insights into the portions of your codebase that are actively tested compared to those that remain untested. You can gather coverage data by using the command `coverage run` to execute your testing suite. No matter how you generally run tests, you can integrate coverage by launching your test runner with the coverage command. For example, if your test runner command starts with "python," you can simply replace "python" with "coverage run." To limit the coverage analysis to the current directory and to find files that haven’t been executed at all, you can add the source parameter to your coverage command. While Coverage.py primarily measures line coverage, it also has the ability to evaluate branch coverage. Moreover, it offers insights into which specific tests were responsible for executing certain lines of code, thereby deepening your understanding of the effectiveness of your tests. This thorough method of coverage analysis not only enhances the reliability of your code but also fosters a more robust development process. Ultimately, utilizing Coverage.py can lead to significant improvements in software quality and maintainability.

We help you confidently deploy your code by pinpointing areas within your suite that remain untested. Our service is complimentary for open-source projects, whereas private repositories can take advantage of our premium accounts. You can quickly register via platforms like GitHub, Bitbucket, and GitLab. A thoroughly tested codebase is essential for success, but spotting gaps in your tests can be quite challenging. Given that you’re probably already utilizing a continuous integration server for testing, why not let it manage the heavy lifting? Coveralls integrates effortlessly with your CI server, scrutinizing your coverage data to reveal hidden issues before they develop into significant problems. If you're restricting your code coverage checks to your local environment, you might overlook valuable insights and trends that could inform your entire development journey. Coveralls allows you to delve into every detail of your coverage while providing unlimited historical data. By leveraging Coveralls, you eliminate the complexities of tracking your code coverage, gaining clarity on the sections that remain untested. This ensures that you can develop your code with confidence, knowing it is both well-covered and resilient. In essence, Coveralls not only simplifies the monitoring process but also enriches your overall development experience, making it a vital tool for programmers. Furthermore, this enhanced visibility fosters a culture of continuous improvement in your coding practices.

BMC Compuware Xpediter is an extensive toolkit of debuggers and interactive analysis solutions specifically designed for programming languages such as COBOL, Assembler, PL/I, and C, enabling developers to quickly understand application behaviors, make necessary changes, and troubleshoot effectively, irrespective of their prior knowledge of the source code. This comprehensive toolset makes it easy for developers to engage in interactive testing sessions, providing them with the confidence to move applications into production environments. Users benefit from the ability to execute code line by line while exercising complete oversight over all components of program execution and data handling. Through the use of Code Coverage features, developers can confirm execution paths and gather performance analytics across different platforms. Moreover, they can leverage Abend-AID diagnostic capabilities within their debugging workflows. The integration with Topaz for Program Analysis enhances the process by offering a visual layout of the source code, which aids in troubleshooting efforts. Additionally, Topaz for Total Test empowers developers to generate an extensive array of automated, virtualized test cases, further improving testing efficiency. The capacity to intercept and debug mainframe transactions initiated from remote locations introduces an added level of adaptability and productivity to the development process. In summary, Xpediter not only simplifies debugging but also significantly enhances the overall development experience, helping developers meet their targets more effectively.

Our platform employs a range of robust security strategies, such as feedback-driven fuzz testing and coverage-guided fuzz testing, to produce an extensive array of test cases that identify elusive bugs within your application. This white-box methodology not only helps mitigate edge cases but also accelerates the development process. Cutting-edge fuzzing engines are designed to generate inputs that optimize code coverage effectively. Additionally, sophisticated bug detection tools monitor for errors during the execution of code, ensuring that only genuine vulnerabilities are exposed. To consistently reproduce errors, you will require both the stack trace and the input data. Furthermore, AI-driven white-box testing leverages insights from previous tests, enabling a continuous learning process regarding the application's intricacies. As a result, you can uncover security-critical bugs with ever-increasing accuracy, ultimately enhancing the reliability of your software. This innovative approach not only improves security but also fosters confidence in the development lifecycle.

Ensure the production of high-quality code while following agile development methodologies. With Jtest's comprehensive suite of Java testing tools, you can achieve impeccable coding at each phase of Java software development. Simplify adherence to security regulations by making certain that your Java code meets established industry standards. The automated creation of compliance verification documentation streamlines the process. Accelerate the delivery of quality software by utilizing Java testing tools that can quickly and effectively identify defects. By proactively addressing issues, you can save time and reduce costs associated with complex problems down the line. Maximize your investment in unit testing by developing JUnit test suites that are not only easy to maintain but also optimized for code coverage. Enhanced test execution capabilities provide quicker feedback from continuous integration as well as from your integrated development environment. Parasoft Jtest seamlessly fits into your development framework and CI/CD pipeline, offering real-time, insightful updates on your testing and compliance status. This level of integration ensures that your development process remains efficient and effective, ultimately leading to better software outcomes.

Codase boasts an extensive collection of open-source code, greatly improving accessibility to code that is frequently hidden within compressed files and version control systems, domains where conventional search engines often falter. Additionally, Codase emphasizes the importance of high-quality code by ensuring that every line undergoes rigorous validation and compilation through a sophisticated source code analysis engine. Founded by Dr. Huihong Luo and a group of seasoned professionals, this privately held company is based in Silicon Valley. Our team is composed of innovative and passionate experts with diverse backgrounds in technology and business, each possessing remarkable achievements in their respective fields. We aim to establish Codase as the leading search engine for source code, excelling in quality, performance, features, and extensive code coverage. Developers may find Codase to be an essential tool, as our main goal is to boost your coding efficiency and productivity. Ultimately, we are committed to creating a powerful platform that enables developers to reach new heights in their coding projects, helping them to innovate and create with greater ease.