Best GitHub Code Review Tools [Free & Paid]

Code reviews can feel like a double-edged sword. As a developer, I’ve spent countless hours combing through pull requests, juggling deadlines, and trying to provide meaningful feedback. While necessary for maintaining quality, the process often becomes tedious and time-consuming, especially when you’re dealing with complex codebases or tight schedules.

Code reviews are more than just a task—they’re a critical step in ensuring quality, improving collaboration, and avoiding costly bugs. But the traditional approach to code reviews often falls short, bogged down by manual effort, lack of context, and subjective biases.

Thankfully, modern code review tools are stepping up to solve these challenges. From automated checks to AI-powered assistants, these tools can identify bugs, improve code quality, and even suggest fixes—all while saving you time.

In this article, we’ll explore the 15 best GitHub code review tools available today. Whether you’re looking for an AI-powered assistant or a collaborative review platform, this guide will help you choose the right tool for your needs.

1. Bito's AI Code Review Agent

Bito’s AI Code Review Agent is transforming code reviews by understanding your entire codebase and providing highly accurate, context-aware feedback. It doesn’t just spot bugs and vulnerabilities; it also identifies inefficiencies and suggests actionable fixes.

Key features:

• Context-aware reviews that consider the entire codebase.
• Detailed feedback on pull requests, highlighting key issues.
• AI-driven suggestions for improving code quality and maintainability.
• Detailed code review analytics.
• Integration with GitHub, GitLab, Bitbucket, VS Code, and JetBrains IDEs for seamless workflows.

Pricing details:

Bito offers a free trial, with paid plans starting at $15 per user per month.

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Unlock the power of Bito’s AI for free through their Open-Source Sponsorship Program. Apply now to gain free access to Bito’s AI Code Review Agent.

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2. CodeRabbit

CodeRabbit uses AI to analyze pull requests in real time, providing detailed, unbiased feedback. It enhances collaboration by surfacing potential issues early and ensuring consistent code quality.

Key features:

• AI-powered analysis of pull requests.
• Detection of bugs, vulnerabilities, and performance issues.
• Integrates directly with GitHub for smooth collaboration.
• Customizable rules for specific project needs.
• Automated suggestions for refactoring.

Pricing details:

CodeRabbit offers a free trial, with paid plans starting at $15 per user per month.

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3. Qodo Merge (formerly PR-Agent)

This AI-driven tool focuses on simplifying code reviews by categorizing changes and providing clear suggestions. It’s designed to save time for reviewers while maintaining high standards.

Key features:

• Categorized review suggestions for faster assessments.
• Highlights key changes and their impact on the codebase.
• Integrates directly into GitHub workflows.
• AI-driven recommendations for code improvements.
• Easy setup with minimal configuration.

Pricing details:

Free for small teams; premium plans start at $19 per user per month.

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4. GitHub's built-in code review

GitHub’s native code review system is a staple for many teams, offering intuitive features to comment on specific lines, request changes, and track feedback.

Key features:

• Inline commenting on pull requests.
• Approval and change request workflows.
• Seamless integration with GitHub repositories.
• Notifications and activity tracking.
• Support for draft pull requests.

Pricing details:

Free for public repositories and $4 per user per month for private ones.

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5. Review Board

Review Board is an open-source, web-based code review tool that integrates with various version control systems, making it easy for teams to collaborate on reviews.

Key features:

• Web-based review interface.
• Multi-repository support.
• Automated issue tracking and resolution.
• Syntax highlighting for easier reading.
• Historical record of reviews.

Pricing details:

Self-hosted solution is free whereas cloud-based plan starts at $29 per month.

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6. Crucible

Crucible enables detailed peer reviews, allowing teams to discuss and resolve issues collaboratively before merging code.

Key features:

• Inline comments and threaded discussions.
• Deep integration with GitHub and other version control systems.
• Customizable workflows and permissions.
• Supports pre-commit reviews.
• Tracks metrics for team performance.

Pricing details:

Starts at $10 one-time payment.

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7. CodeScene

CodeScene focuses on technical debt and code health, providing actionable insights that help maintain clean, efficient codebases.

Key features:

• Identifies hotspots and technical debt.
• Visualizes code quality trends over time.
• Prioritizes issues based on their impact.
• Integrates with CI/CD pipelines.
• Offers risk analysis for changes.

Pricing details:

Plans start at €20 per active author per month.

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8. Codacy

Codacy is an automated code review platform that helps developers ensure code quality by performing static analysis and providing actionable insights on code style, complexity, and test coverage.

Key features:

• Automated static code analysis.
• Real-time feedback on code issues.
• Integration with GitHub for seamless pull request checks.
• Tracks technical debt and code coverage trends.
• Customizable rules for project-specific needs.

Pricing details:

Free for open-source projects; team plan starts at $18 per user per month.

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9. SonarCloud

SonarCloud helps identify bugs, vulnerabilities, and code smells in your codebase. It integrates with GitHub to provide clear, actionable feedback on pull requests, improving code maintainability.

Key features:

• Cloud-based static analysis tool.
• Highlights vulnerabilities and security hotspots.
• Supports multiple languages and frameworks.
• Direct integration with GitHub for pull request analysis.
• Tracks code quality metrics over time.

Pricing details:

Free for open-source projects; team plan starts at $32 per month.

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10. Semgrep

Semgrep is a lightweight static analysis tool that allows you to write custom rules for code scanning. It’s perfect for teams looking for a flexible and efficient code review solution.

Key features:

• Detects security vulnerabilities and code issues.
• Highly customizable with user-defined rules.
• Integrates directly with GitHub for real-time feedback.
• Lightweight and easy to set up.
• Supports multiple languages and frameworks.

Pricing details:

Free for basic usage; paid plans start at $40 per user per month.

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11. Qodana

Developed by JetBrains, Qodana is a code quality platform that integrates with CI/CD pipelines to enforce coding guidelines and assist in code reviews.

Key features:

• Advanced static code analysis.
• Detects code smells and anti-patterns.
• Integrates with GitHub and CI/CD pipelines.
• Supports over 15 programming languages.
• Offers detailed reports with actionable insights.

Pricing details:

Free for small teams; premium plans start at $6 per user per month.

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12. PullRequest

PullRequest offers professional, on-demand code reviews by vetted experts. It ensures high-quality reviews without adding to your team’s workload.

Key features:

• On-demand code reviews by experts.
• Detailed feedback on bugs, vulnerabilities, and improvements.
• Seamless integration with GitHub.
• Comprehensive reviewer matching based on expertise.
• Support for multiple programming languages.

Pricing details:

Starting at $129 per developer per month (billed annually)

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13. CodeFactor

CodeFactor monitors code quality in real time and integrates with GitHub to provide actionable feedback directly on pull requests.

Key features:

• Continuous monitoring of code quality.
• Real-time feedback on pull requests.
• Detects complexity, style issues, and code smells.
• Integration with GitHub and CI/CD tools.
• Tracks technical debt and improvement trends.

Pricing details:

Free for open-source projects; team plans start at $24 per month.

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14. DeepCode AI

DeepCode AI is an AI-powered code analysis tool that scans codebases for bugs and vulnerabilities. Its recommendations help maintain high-quality, secure code.

Key features:

• AI-driven code scanning and analysis.
• Detects bugs, vulnerabilities, and inefficiencies.
• Integrates directly with GitHub pull requests.
• Supports multiple programming languages.
• Offers actionable suggestions for fixes.

Pricing details:

Free for individual developers; enterprise pricing available on request.

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15. CodeClimate

CodeClimate provides automated code review tools to measure test coverage, code maintainability, and other quality metrics, helping teams improve their codebases over time.

Key features:

• Automated code review and quality checks.
• Metrics for test coverage and maintainability.
• Integration with GitHub for pull request feedback.
• Historical analysis of code quality trends.
• Supports multiple languages and frameworks.

Pricing details:

Free for open-source projects; team plans start at $20 per user per month.

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Conclusion

The world of code reviews is changing, and AI-powered tools are leading the way. These tools not only save time but also bring objectivity and consistency to the process. Whether you’re a solo developer or part of a large team, investing in the right code review tool can dramatically improve your workflow.

Among these tools, Bito’s AI Code Review Agent stands out as a comprehensive solution, offering unmatched context-aware suggestions, code review analytics, and seamless GitHub integration. However, the choice depends on your specific needs—whether it’s automation, collaboration, or enhanced code quality.

Explore these tools and embrace the future of code reviews today. Your team—and your codebase—will thank you.

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