Best Free Code Security Tools of 2026

Aikido is the all-in-one security platform for development teams to secure their complete stack, from code to cloud. Aikido centralizes all code and cloud security scanners in one place. Aikido offers a range of powerful scanners including static code analysis (SAST), dynamic application security testing (DAST), container image scanning, and infrastructure-as-code (IaC) scanning. Aikido integrates AI-powered auto-fixing features, reducing manual work by automatically generating pull requests to resolve vulnerabilities and security issues. It also provides customizable alerts, real-time vulnerability monitoring, and runtime protection, enabling teams to secure their applications and infrastructure seamlessly.

Codespy AI Detector offers a comprehensive solution to detect AI-generated source code across multiple widely-used programming languages, including Python, Java, C#, and JavaScript. This tool pinpoints code written by advanced AI systems such as ChatGPT and Claude, which may inadvertently introduce vulnerabilities or bugs in software. By highlighting these AI-originated segments, Codespy empowers development teams to review and correct potential issues before deployment. The detector integrates with popular tools like Visual Studio Code and even functions as a plugin for ChatGPT, streamlining the identification process. Companies can use Codespy to establish safe AI coding standards and manage innovation without sacrificing security. Its pricing is flexible, ranging from a free tier with limited scans to plans suited for small businesses and enterprises. Users worldwide rely on Codespy for its high accuracy and user-friendly interface. No credit card is needed to start using the free version, making it easy for teams to begin improving their AI code oversight immediately.

Reshift is the ultimate solution designed specifically for Node.js developers to enhance the security of their custom code. By utilizing this tool, developers are four times more likely to resolve issues before their code is committed. It seamlessly integrates security into the development process by detecting and addressing security vulnerabilities at compile time. This innovative security tool collaborates with developers without hindering their workflow. Reshift's integration with developers’ IDE allows for real-time identification of security concerns, enabling fixes prior to code merging. For those who are new to the world of security, Reshift simplifies the incorporation of security measures into the development pipeline. Tailored for expanding software companies aiming to advance their security, this tool is particularly suited for small to medium-sized businesses that may not have extensive security knowledge. With Reshift, you can enhance code security while simultaneously gaining insights into secure coding practices. Furthermore, Reshift offers comprehensive resources and best practices, empowering developers to learn about security as they write their code. This dual focus on education and practical application makes Reshift an invaluable asset for any development team.

Enhance the quality of your code by adopting healthier coding practices and refining your code review process. Codecov offers a suite of integrated tools designed to organize, merge, archive, and compare coverage reports seamlessly. This service is free for open-source projects, with paid plans beginning at just $10 per user each month. It supports multiple programming languages, including Ruby, Python, C++, and JavaScript, and can be effortlessly integrated into any continuous integration (CI) workflow without the need for extensive setup. The platform features automatic merging of reports across all CI systems and languages into a unified document. Users can receive tailored status updates on various coverage metrics and review reports organized by project, folder, and test type, such as unit or integration tests. Additionally, detailed comments on the coverage reports are directly included in your pull requests. Committed to safeguarding your data and systems, Codecov holds SOC 2 Type II certification, which verifies that an independent third party has evaluated and confirmed their security practices. By utilizing these tools, teams can significantly increase code quality and streamline their development processes.

Conducting runtime code reviews for every change made in the code editor and during continuous integration (CI) helps identify performance, security, and stability issues before deployment. This proactive approach ensures that problems are addressed while coding, preventing them from reaching production. Team members can collaborate to troubleshoot application behavior without needing to replicate each other's development environments. CI can automate the generation of AppMaps, providing alerts for performance and security vulnerabilities, while also allowing for comparisons of observability and alerts across different branches and teams. By integrating AppMap into CI, developers can automate observability, generate OpenAPI documentation, and accomplish much more. Furthermore, AppMap code reviews provide access to comprehensive resources that aid in identifying the root causes of any unexpected behavior. The use of sequence diagram diffs effectively illustrates changes in behavior within the code, offering a clear visual representation of modifications and their impact. This process not only enhances code quality but also fosters better communication and understanding among team members.

Dependabot is an automated tool for managing dependencies that works seamlessly with GitHub repositories to ensure that project dependencies are both current and secure. It actively scans for outdated or vulnerable libraries and automatically creates pull requests to update these dependencies, thereby helping projects stay secure and compatible with the latest versions. This tool is built to work with a variety of package managers and ecosystems, making it adaptable for different development settings. Developers can customize how Dependabot operates through configuration files, which provide options for specific update timelines and rules regarding dependencies. By streamlining the process of updating dependencies, Dependabot minimizes the manual workload involved in maintaining them, which ultimately leads to improved code quality and enhanced security. In doing so, it empowers developers to focus more on writing code rather than managing dependencies.

Patched is a managed service that utilizes the open-source Patchwork framework to streamline various development tasks, including code reviews, bug fixes, security updates, and documentation efforts. By harnessing the capabilities of large language models, Patched empowers developers to create and implement AI-driven workflows, known as "patch flows," which automatically manage activities following code completion, ultimately improving code quality and speeding up development timelines. The platform features an intuitive graphical interface along with a visual workflow builder, which facilitates the personalization of patch flows without the burden of overseeing infrastructure or LLM endpoints. For users interested in self-hosting options, Patchwork offers a command-line interface agent that integrates effortlessly into existing development workflows. Furthermore, Patched prioritizes privacy and control, allowing organizations to deploy the service within their own infrastructure while using their specific LLM API keys. This combination of features ensures that developers can optimize their processes while maintaining a high level of security and customization.

Diamond is a sophisticated AI tool designed for code review that delivers prompt, actionable insights on each pull request, thereby improving code quality and speeding up development timelines. It automatically detects various potential problems, including logical errors, security flaws, performance issues, and inconsistencies in documentation, which enables teams to concentrate on development rather than manual code checks. Eliminating the need for complex setups, Diamond integrates effortlessly with your repository, providing valuable, context-aware suggestions without the clutter often found in other AI solutions. Users have the flexibility to tailor review criteria by uploading their preferred style guides and filtering out irrelevant comments, ensuring a streamlined and effective review process. Additionally, Diamond offers analytical insights on review metrics, categorizing issues and proposing fixes that can be implemented with a single click, making the entire review experience more efficient. By utilizing Diamond, teams can enhance their collaborative efforts and maintain a high standard of code integrity throughout their projects.

Matter AI serves as an AI-driven code review tool that optimizes pull request workflows by producing comprehensive, context-sensitive summaries in mere seconds, thereby removing the necessity for manual documentation. It improves code integrity by detecting bugs, security vulnerabilities, and performance concerns prior to deployment. Matter AI seamlessly integrates with various internal platforms such as Notion, JIRA, Confluence, and Linear, delivering dependable summaries and code evaluations. The AI-generated explanations assist reviewers in grasping intricate code swiftly, facilitating smoother approvals and minimizing review durations. With a robust focus on security, Matter AI boasts SOC 2 Type II certification and guarantees data confidentiality by processing code within isolated environments without retaining any proprietary information. This innovative tool is particularly suited for development teams seeking to expedite their code review processes while upholding superior standards of code quality and security. Additionally, Matter AI fosters collaboration among team members, allowing for a more efficient and cohesive development environment.

Sourcery serves as an AI-driven automated code review tool and coding assistant that aims to enhance the quality of code, identify bugs and security vulnerabilities early on, and ensure uniform standards across various projects for developers and engineering teams. It seamlessly integrates with widely-used development platforms like GitHub, GitLab, and integrated development environments (IDEs) such as VS Code and JetBrains, offering immediate, actionable insights on pull requests and in-code edits instead of relying primarily on conventional peer review processes. By leveraging a blend of large language model capabilities and static analysis, Sourcery evaluates code diffs to provide concise summaries, detailed line-by-line recommendations, overarching feedback, and visual representations that clarify suggested modifications, striving to achieve a review standard akin to that of a fellow developer. Within the IDE, it acts as an instant pair programming assistant that highlights possible enhancements, facilitates one-click application of recommendations, and includes an AI chat feature for further support, making it a versatile tool for developers looking to refine their coding practices. Additionally, Sourcery's real-time feedback mechanism fosters a collaborative coding environment, enabling teams to work more efficiently and effectively together.

Enhance your productivity by ensuring only high-quality code is released, as SonarQube Cloud (previously known as SonarCloud) seamlessly evaluates branches and enriches pull requests with insights. Identify subtle bugs to avoid unpredictable behavior that could affect users and address security vulnerabilities that threaten your application while gaining knowledge of application security through the Security Hotspots feature. Within moments, you can begin using the platform right where your code resides, benefiting from immediate access to the most current features and updates. Project dashboards provide vital information on code quality and readiness for release, keeping both teams and stakeholders in the loop. Showcase project badges to demonstrate your commitment to excellence within your communities. Code quality and security are essential across your entire technology stack, encompassing both front-end and back-end development. That’s why we support a wide range of 24 programming languages, including Python, Java, C++, and many more. The demand for transparency in coding practices is on the rise, and we invite you to be a part of this movement; it's completely free for open-source projects, making it an accessible opportunity for all developers! Plus, by participating, you contribute to a larger community dedicated to improving software quality.

Rencore Code (SPCAF), the only solution available on the market, analyzes and ensures SharePoint, Microsoft 365, and Teams code quality. This includes checking for violations against more than 1100 policies, as well as checks regarding security, performance and maintainability.

User-friendly and requiring no setup, simply download from your preferred IDE marketplace and keep coding while SonarQube for IDE (previously known as SonarLint) handles the rest. Unlike your existing linting solutions that often involve additional complexity, such as specific tools for different languages or extensive configuration processes, SonarQube for IDE offers a unified approach to tackling your Code Quality and Code Security challenges. It comes equipped with a vast array of language-specific rules designed to detect Bugs, Code Smells, and Security Vulnerabilities directly within your IDE as you write code. Whether it’s identifying risky regex patterns or ensuring compliance with coding standards, SonarQube for IDE acts as a reliable partner in your quest for flawless code. With this smart tool at your disposal, any errors you make are kept within your view, enabling you to comprehend, swiftly correct, and learn from them effectively, which ultimately enhances your coding skills over time. In this way, SonarQube for IDE not only helps maintain code integrity but also fosters continuous improvement in your development process.

Tailor the code review criteria to reflect the standards that matter most to you, enabling you to sidestep minor bugs and focus on significant issues. This allows for code reviews to be conducted without the constant concern of potential security flaws. Codegrip ensures your code remains private during these automated reviews, allowing you to maintain confidentiality. Stay informed about your project's developments as you receive automatic code quality assessments and pull request alerts in a designated Slack channel of your preference. Manage several projects simultaneously with a centralized dashboard that aggregates all relevant information in one location. Monitor the progress of code quality enhancements over time through straightforward metrics and visual representations. The OWASP framework embodies a collective agreement on the foremost security threats faced by web and mobile applications, providing essential guidance to both developers and security experts regarding the most prevalent and easily exploitable vulnerabilities that can arise in web applications. By following these guidelines, you can enhance your awareness and preparedness against security risks.

PHP Secure is an online code scanner that scans your PHP code to find critical security vulnerabilities. Online scanner for free: - Quickly find web app vulnerabilities - Provides explicit reports and recommends fixes for vulnerabilities - No special knowledge is required to use the product. - Reduces risks, saves money, and increases productivity PHP Secure Scanner can be used to analyze sites built on Php, Laravel framework, CMS Wordpress Drupal and Joomla. PHP Secure detects and blocks the most dangerous and common types of attacks. -SQL injection vulnerabilities Command Injection -Cross-Site Scripting (XSS) Vulnerabilities -PHP Serialize Injections Remote Code Executions -Double Escaping -Directory Crossing ReDos (Regular Expression of Denial of Services)

Securaa is an all-encompassing no-code platform for security automation that boasts over 200 integrations, more than 1,000 automated tasks, and 100+ playbooks. By utilizing Securaa, organizations can seamlessly oversee their security applications, resources, and operations without the complexities of coding. This platform empowers clients to efficiently utilize features such as Risk Scoring, Integrated Threat Intelligence, Asset Explorer, Playbooks, Case Management, and Dashboards to automate Level 1 tasks, serving as the primary tool for streamlining daily investigations, triage, enrichment, and response activities, which can reduce the time spent on each alert by over 95%. Moreover, Securaa enhances the productivity of security analysts by more than 300%, making it an indispensable asset for modern security operations. Its user-friendly interface ensures that businesses can focus on their core objectives while trusting their security processes to an efficient automation system.