Best Code Review Tools for JavaScript

Introducing an advanced code review solution powered by AI that addresses issues in your code. Ensure high-quality coding standards and tackle vulnerabilities right from the start. Effortlessly resolve these issues directly in your integrated development environment (IDE) or through pull requests. Aikido serves as your comprehensive software security headquarters, covering everything from vulnerability management to penetration testing. Safeguard every aspect of your development, hosting, and operational processes. Designed to accommodate teams of all sizes, Aikido empowers companies to deliver secure software efficiently. It’s trusted by industry leaders such as Revolut, Deel, The Premier League, Tines, n8n, SoundCloud, and over 50,000 other organizations. With Aikido, developers can focus more on creating and innovating.

ZeroPath (YC S24) is an AI-native application security platform that delivers comprehensive code protection beyond traditional SAST. Founded by security engineers from Tesla and Google, ZeroPath combines large language models with deep program analysis to deliver intelligent security testing that finds real vulnerabilities while dramatically reducing false positives. Unlike traditional SAST tools that rely on pattern matching, ZeroPath understands code context, business logic, and developer intent. This enables identification of sophisticated security issues including business logic flaws, broken authentication, authorization bypasses, and complex dependency vulnerabilities. Our comprehensive security suite covers the application security lifecycle: 1. AI-powered SAST 2. Software Composition Analysis with reachability analysis 3. Secrets detection and validation 4. Infrastructure as Code scanning 5. Automated PR reviews 6. Automated patch generation and more... ZeroPath integrates seamlessly with GitHub, GitLab, Bitbucket, Azure DevOps and many more. The platform handles codebases with millions of lines across Python, JavaScript, TypeScript, Java, Go, Ruby, Rust, PHP, Kotlin and more. Our research team has been successful in finding vulnerabilities like critical account takeover in better-auth (CVE-2025-61928, 300k+ weekly downloads), identifying 170+ verified bugs in curl, and discovering 0-days in production systems at Netflix, Hulu, and Salesforce. Trusted by 750+ companies and performing 200k+ code scans monthly.

Windsurf is a cutting-edge IDE designed for developers to maintain focus and productivity through AI-driven assistance. At the heart of the platform is Cascade, an intelligent agent that not only fixes bugs and errors but also anticipates potential issues before they arise. With built-in features for real-time code previews, automatic linting, and seamless integrations with popular tools like GitHub and Slack, Windsurf streamlines the development process. Developers can also benefit from memory tracking, which helps Cascade recall past work, and smart suggestions that enhance code optimization. Windsurf’s unique capabilities ensure that developers can work faster and smarter, reducing onboarding time and accelerating project delivery.

SonarQube Server serves as a self-hosted solution for ongoing code quality assessment, enabling development teams to detect and address bugs, vulnerabilities, and code issues in real time. It delivers automated static analysis across multiple programming languages, ensuring that the highest standards of quality and security are upheld throughout the software development process. Additionally, SonarQube Server integrates effortlessly with current CI/CD workflows, providing options for both on-premise and cloud deployments. Equipped with sophisticated reporting capabilities, it assists teams in managing technical debt, monitoring progress, and maintaining coding standards. This platform is particularly well-suited for organizations desiring comprehensive oversight of their code quality and security while maintaining high performance levels. Furthermore, SonarQube fosters a culture of continuous improvement within development teams, encouraging proactive measures to enhance code integrity over time.

Enhance the speed and efficiency of software development and delivery by leveraging generative AI support, all while ensuring robust enterprise security and privacy safeguards. Gemini Code Assist streamlines your coding process by completing your code as you type and can generate entire code blocks or functions upon request. This powerful code assistance tool is compatible with a variety of popular integrated development environments (IDEs) like Visual Studio Code and JetBrains IDEs (including IntelliJ, PyCharm, GoLand, and WebStorm), as well as Cloud Workstations and Cloud Shell Editor, supporting over 20 programming languages such as Java, JavaScript, Python, C, C++, Go, PHP, and SQL. Utilizing a natural language chat interface, you can easily interact with Gemini Code Assist to obtain solutions to your coding queries or gain insights into coding best practices, with chat functionality accessible across all supported IDEs. Organizations have the flexibility to tailor Gemini Code Assist by integrating their private codebases and knowledge repositories, enabling the tool to provide more personalized assistance that aligns with specific enterprise needs. Furthermore, Gemini Code Assist has the capability to facilitate extensive modifications across entire codebases, thereby optimizing the development workflow significantly. This adaptability not only boosts productivity but also empowers teams to innovate more rapidly in a secure environment.

CodeScene's powerful features go beyond traditional code analysis. Visualize and evaluate all the factors that influence software delivery and quality, not just the code itself. Make informed, data-driven decisions based on CodeScene’s actionable insights and recommendations. CodeScene guides developers and technical leaders to: - Get a holistic overview and evolution of your software system in one single dashboard. - Identify, prioritize, and tackle technical debt based on return on investment. - Maintain a healthy codebase with powerful CodeHealth™ Metrics, spend less time on rework and more time on innovation. - Seamlessly integrate with Pull Requests and editors, get actionable code reviews and refactoring recommendations. - Set Improvement goals and quality gates for teams to work towards while monitoring the progress. - Support retrospectives by identifying areas for improvement. - Benchmark performance against personalized trends. - Understand the social side of the code, measure socio-technical factors like key personnel dependencies, knowledge sharing and inter-team coordination.

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.

DeepSource streamlines the process of identifying and resolving code issues during reviews, including risks of bugs, anti-patterns, performance bottlenecks, and security vulnerabilities. Setting it up with your Bitbucket, GitHub, or GitLab account takes under five minutes, making it incredibly convenient. It supports various programming languages such as Python, Go, Ruby, and JavaScript. Additionally, DeepSource encompasses all essential programming languages, Infrastructure-as-Code capabilities, secret detection, code coverage, and much more. This means you can rely solely on DeepSource for code protection. Initiate your development with the most advanced static analysis platform, ensuring that you catch bugs before they make their way into production. It boasts the largest array of static analysis rules available in the market. Your team will benefit from having a centralized location to monitor and address code health effectively. With DeepSource, code formatting can be automated, ensuring your CI pipeline remains intact without style violations disrupting the process. Furthermore, it can automatically generate and implement fixes for detected issues with just a few clicks, enhancing your team's productivity and efficiency.

CodeSandbox aims to make it easier for you to express your ideas with code, and to validate them. It also removes the hassles of setting up development tooling and sharing your project. Join us to help build the future of web coding. Over 4M developers use the platform each month. This includes organizations like Shopify and Atlassian. Since its launch, creators have created over 35M apps. It's used in thousands of open-source projects like React, Vue and Babel. You can invite your friends, colleagues, or team to join you or simply view your creation by using a URL. Use any of 1M+ packages for building real, powerful applications quickly and efficiently. Import and run repos directly from GitHub or choose from hundreds of templates to start in seconds. Boxy, CodeSandbox's AI-powered coding assistant, is now available to all Pro subscriptions.

Integrate your team's code evaluations with automated style suggestions across all programming languages in a single platform. Connecting your repository takes just a few clicks, and our review process is completed faster than ever. You can either adopt the recommended style guides or tailor each tool to meet your team's preferences. Utilize auto-fixing features to rectify style discrepancies, allowing you to concentrate on providing constructive feedback. Stickler CI retains your code solely for the duration of the review process, ensuring that your data is secure; once the review comments are made, your code is promptly deleted from our servers. Gradually enhance and unify the quality of your code with each pull request, ensuring that your coding standards are consistently applied amid ongoing changes without hindering your team's workflow. Achieve uniformity in your code quality and style by automatically employing style and quality verification tools. You have the option to either stick with the default settings or customize linters to align with your current coding standards, making it easier for your team to maintain high-quality code. In this way, you can foster a collaborative environment while promoting best practices in coding.

Cosine is capable of grasping both broad concepts and intricate details to deliver answers that surpass human capabilities. We are more than just a layer over an LLM; our approach integrates various methods such as static analysis and semantic search among others. Just pose a question to Cosine about adding a new feature or altering existing code, and we will produce a comprehensive step-by-step guide. Cosine meticulously indexes your codebase, comprehending it on various dimensions; from the relationships among files and functions to an in-depth semantic analysis of the code, ensuring that any inquiry regarding your codebase can be addressed. Genie stands out as the leading AI software engineer, boasting an impressive 30% evaluation score on the widely recognized SWE-Bench benchmark. It excels at debugging, feature development, and code refactoring, performing these tasks either completely independently or in collaboration with the user, creating a partnership akin to working alongside a colleague rather than merely acting as a copilot. Essentially, both Cosine and Genie redefine the standards of what AI can achieve in software engineering.

Ellipsis is an AI-driven code review assistant designed to improve code quality on every pull request. It automatically analyzes commits to catch bugs, enforce style rules, and flag problematic patterns. Ellipsis integrates seamlessly into GitHub workflows, requiring only a few clicks to install. Beyond reviews, it can generate code, answer technical questions, and assist with feature development. Teams can interact with Ellipsis directly through GitHub comments for asynchronous collaboration. The platform adapts over time by learning which review feedback teams value most. Ellipsis can also generate pull request summaries and changelogs to streamline communication. Security is built in, with strict data handling and no persistent code storage. Pricing is simple and seat-based with unlimited usage. Ellipsis functions as a reliable AI teammate for modern development teams.

Access immediate code evaluations from qualified engineers, augmented by AI technology. Each time you initiate a pull request, you can seamlessly integrate senior engineers into your workflow. Accelerate the delivery of superior, secure code with the support of AI-driven code assessments. Whether your development team comprises 5 or 5,000 members, PullRequest will elevate your code review system and tailor it to suit your requirements. Our expert reviewers assist in identifying security threats, uncovering concealed bugs, and addressing performance challenges prior to deployment. This entire process is integrated into your current tools for maximum efficiency. Our seasoned reviewers, bolstered by AI analysis, can target critical security vulnerabilities effectively. We employ advanced static analysis that incorporates both open-source resources and proprietary AI, providing reviewers with enhanced insights. Allow your senior personnel to focus on strategic initiatives while making substantial strides in resolving issues and refining code, even as other team members continue to develop. With this innovative approach, your team can maintain productivity while ensuring code quality.

Metabob identifies, interprets, and resolves coding issues arising from both human and AI sources. By leveraging advanced graph neural networks for detection and large language models for explanation and resolution, Metabob merges the strengths of both technologies. The graph neural networks analyze and categorize problematic code while maintaining contextual awareness. This problematic code, enriched with relevant context, is then stored in Metabob's backend system. The information retained in the backend is subsequently utilized by an integrated large language model. This model produces tailored explanations and solutions based on the context provided. Metabob's AI has been trained on an extensive dataset of millions of bug fixes executed by skilled developers. With a deep understanding of code logic and context, Metabob is capable of identifying intricate issues that span multiple codebases, automatically creating suitable fixes. The AI code review feature of Metabob can uncover hundreds of logical issues, including race conditions and unhandled edge cases, which often go unnoticed by conventional static analysis tools. This innovative approach not only enhances debugging efficiency but also elevates the overall quality of the codebase.

Macroscope serves as an AI-driven analytics and visibility platform tailored for engineering and product teams, linking seamlessly with a company's codebase, commit history, issue tracking systems like Linear or Jira, and Slack to automatically produce insights regarding the development process. By employing code-walking techniques on the Abstract Syntax Tree (AST), it comprehensively evaluates changes to grasp the relationships and dependencies within the code, ultimately generating summaries for commits, pull requests (which include automated reviews and descriptions), shifts in the overall codebase, and patterns in feature development or bug resolution. Stakeholders can inquire about progress using natural language queries, such as “What did we ship last week?”, gain insights into the allocation of engineering resources, identify significant bugs with a reduced rate of false positives, and monitor productivity and status without the need to scrutinize every single difference in the code. This tool enhances the efficiency of communication among team members by centralizing information and fostering a clearer understanding of project statuses.

Mesa is an innovative platform that leverages artificial intelligence to enhance code review processes, enabling engineering teams to elevate software quality and confidently deploy code by addressing technical debt before it impacts production. The platform's smart agents are capable of understanding the distinct elements of a team's codebase, business logic, and development standards, allowing them to provide reviews that are contextual and precise, surpassing mere linting or generic suggestions from AI. Users have the flexibility to develop custom review agents that focus on specific issues such as security vulnerabilities, performance optimization, and domain-specific logic, while also selecting from a diverse range of foundational models from notable providers like OpenAI, Anthropic, and Google, which can be optimized for various metrics such as speed, cost-efficiency, or intelligence level. Additionally, Mesa produces comprehensive and consistent descriptions for pull requests utilizing team-defined templates, seamlessly integrating into existing CI/CD workflows, and adjusting to different branching strategies to ensure that quality checks are an integral part of daily development activities. This adaptability not only streamlines the review process but also empowers teams to maintain high standards throughout their software development lifecycle.

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.

Kodus is a collaborative, open-source platform that harnesses AI technology for code review, featuring an intelligent agent named Kody that seamlessly integrates with popular Git workflows like GitHub, GitLab, Bitbucket, and Azure DevOps, aimed at assisting engineering teams in automating and enhancing the quality of their code assessments. By performing thorough analyses on each pull request with a deep understanding of the team’s specific codebase, architecture, workflows, coding standards, and business rules, Kody provides targeted feedback focused on quality, security, performance, and style, rather than offering vague recommendations. Teams have the option to create custom review criteria using natural language or select from a collection of pre-validated rules designed to promote best practices and maintain consistent standards; they can also utilize their own API keys to choose and implement any AI model they prefer. Additionally, Kodus transforms unaddressed suggestions into monitored issues, aids in tracking technical debt, and delivers actionable insights in a manner that minimizes distractions, while supporting more than 30 programming languages to ensure broad applicability across different projects. This comprehensive approach not only streamlines the review process but also fosters a culture of continuous improvement within development teams.

Cubic is an AI-driven code review solution that streamlines the analysis of pull requests on GitHub, enabling software development teams to identify bugs, maintain coding standards, and accelerate their release cycles by minimizing manual review delays. It provides immediate, context-aware feedback upon the opening of a pull request by analyzing the entire repository's history and recognized patterns, which leads to inline comments that identify bugs, coding anti-patterns, technical debt, and suggestions for enhancements that human reviewers could overlook, along with one-click fix options for straightforward issues. Additionally, Cubic can produce concise summaries of pull requests that clarify the purpose and effects of changes, intelligently organize complex differences into more manageable segments, and feature a chat interface that allows developers to pose questions or navigate the codebase directly on the platform. Teams have the capability to establish customized review protocols and incorporate business context from issue tracking systems such as Jira, Linear, or Asana, ensuring that code reviews not only assess technical quality but also align with acceptance criteria. With its innovative features, Cubic significantly enhances the efficiency of the code review process, fostering collaboration and improving overall software quality.

Codacy is an automated code review tool. It helps identify problems through static code analysis. This allows engineering teams to save time and tackle technical debt. Codacy seamlessly integrates with your existing workflows on Git provider as well as with Slack and JIRA or using Webhooks. Each commit and pull-request includes notifications about security issues, code coverage, duplicate code, and code complexity. Advanced code metrics provide insight into the health of a project as well as team performance and other metrics. The Codacy CLI allows you to run Codacy code analysis locally. This allows teams to see Codacy results without needing to check their Git provider, or the Codacy app. Codacy supports more than 30 programming languages and is available in free open source and enterprise versions (cloud or self-hosted). For more see https://www.codacy.com/

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.

Quickly assess the overall code quality of your project, examine recent commits, and identify the most problematic files with CodeFactor. This tool will monitor new and resolved issues for every commit and pull request, prioritizing the most critical problems by considering factors like issue code size, frequency of file changes, and overall file size, allowing you to focus on what truly matters. You can easily create and manage issues or comments directly within code files or on the project issues pages. Additionally, CodeFactor provides updates on the status of pull requests for both GitHub and Bitbucket. Users can conveniently toggle the inspection feature for any branch of the repository as needed. Furthermore, CodeFactor integrates with Slack to deliver immediate notifications regarding code quality for every commit made in a branch or pull request. To get started, simply navigate to the repository settings page for installation. The pricing is straightforward and based on the number of private repositories, ensuring transparency with no surprise fees. This makes for a smooth incorporation into your existing workflow, enhancing overall efficiency and collaboration.

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.

Baz provides a comprehensive solution for efficiently reviewing, tracking, and approving code changes, instilling confidence in developers. By enhancing the code review and merging workflow, Baz offers immediate insights and suggestions that allow teams to concentrate on delivering high-quality software. Organizing pull requests into distinct Topics enables a streamlined review process with a well-defined structure. Furthermore, Baz identifies breaking changes across various elements such as APIs, endpoints, and parameters, ensuring a thorough understanding of how all components interconnect. Developers have the flexibility to review, comment, and propose changes wherever necessary, with transparency maintained on both GitHub and Baz. To accurately gauge the implications of a code change, structured impact analysis is essential. By leveraging AI alongside your development tools, Baz analyzes the codebase, maps out dependencies, and delivers actionable reviews that safeguard the stability of your code. You can easily plan your proposed changes and invite team members for their input while assigning relevant reviewers based on their prior contributions to the project. This collaborative approach fosters a more engaged and informed development environment, ultimately leading to better software outcomes.

You can quickly identify cross-code dependencies, and navigate between files and directories. This tool will help you gain a better understanding of the codebase. It will also guide you in planning, reviewing, and onboarding. Software architecture diagrams that automatically update and sync with the codebase. You can use these features to understand how files and folders connect, and how a change fits into the larger architecture. CodeSee Maps are automatically generated when a code change is merged. This means that you don't have to manually refresh your Map. You can quickly see the most active areas in the codebase. You can also get information on each file and folder, including their age and number of lines of code. Tour Alerts can help you keep your Tours up-to-date by allowing you to create visual walkthroughs of your code using Tours.