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Top 23 Code Review Open-Source Projects
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code-review-graph
Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked context reductions on reviews and large-repo workflows.
Project mention: Code-review-graphv 2.1.0, 8× fewer tokens for code reviews via structural graph | news.ycombinator.com | 2026-04-03• True zero-config install — one command across 7 platforms
Tech: Python + Tree-sitter + SQLite (WAL) + FastMCP. 572 tests.
https://code-review-graph.com
GitHub: https://github.com/tirth8205/code-review-graph
pip install code-review-graph && code-review-graph install
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gitpod
The developer platform for on-demand cloud development environments to create software faster and more securely.
First, remote dev environments became table stakes. GitHub Codespaces, Gitpod, and self-hosted dev containers became how serious teams worked. Every engineer I know who ships to production now SSHs into a box they didn't provision, edits files with whatever editor is installed, and commits from a terminal. An IDE-bound agent requires you to also forward your IDE to the remote box, which most people don't bother doing. A terminal agent is already there.
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Project mention: I spent 1 month building my first NPM package from scratch, and here is the result | dev.to | 2026-03-26
The idea for this project came up when I discovered React Doctor. I really liked their concept and thought about a way to bring this kind of auditing tool outside of the React ecosystem. That's how I created Web Doctor.
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pr-agent
🚀 PR Agent: The Original Open-Source PR Reviewer. This project It is not the Qodo free tier.
✅Try out Qodo
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open-code-review
Open-source & free — Battle-tested at Alibaba's scale. Hybrid architecture code review tool: deterministic pipelines + LLM Agent, precise line-level comments, built-in fine-tuned ruleset (NPE, thread-safety, XSS, SQL injection), OpenAI & Anthropic compatible.
I have good experience with using open-code-review:
* https://github.com/alibaba/open-code-review
** https://layandreas.github.io/personal-blog/posts/beyond-vide...
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reviewdog
🐶 Automated code review tool integrated with any code analysis tools regardless of programming language
github.com - reviewdog/reviewdog
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DeepAudit
DeepAudit：人人拥有的 AI 黑客战队，让漏洞挖掘触手可及。国内首个开源的代码漏洞挖掘多智能体系统。小白一键部署运行，自主协作审计 + 自动化沙箱 PoC 验证。支持 Ollama 私有部署 ，一键生成报告。支持中转站。让安全不再昂贵，让审计不再复杂。
Project mention: Show HN: DeepAudit – open-source auditing agent (LLMs and Static Analysis) | news.ycombinator.com | 2025-12-15 -
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Project mention: VSCode-pull-request-GitHub repeatedly asked to sign in again using GitHub | news.ycombinator.com | 2026-06-30
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Project mention: Cargo-crev: A web-of-trust code review system for Rust | news.ycombinator.com | 2025-09-14
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mutant
Mutation testing for Ruby. AI writes your code. AI writes your tests. But who tests the tests?
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About a year ago, I started working on disassembling the NES game Faxanadu. The goal was to fully understand and document the game, and to produce the most thorough understanding of the game yet. It's been fascinating. The game has a two binary scripting languages (one for interactions with items and NPCs, one for NPC/enemy behaviors) and a very interesting graphics rendering layer. At this point pretty much the entire game is well-understood.
Based on this work, there's now a new suite of tools for producing games under the Faxanadu engine, new major mods built with all this, and some work on a modified ROM better built for porting and modding.
Disassembly is here: https://chipx86.com/faxanadu/
And I've been blogging about it at https://chipx86.blog/
Building a universal web-based retro game modding tool along with that work called Nostalgia Studio. The idea is that there's a core foundation for representing game state and building editors, a platform-specific layer for representing things like the NES APU and PPU state, and then game-specific implementations that populate state for two layers below.
Those are the hobbies.
Day job, I work on Review Board (https://www.reviewboard.org), one of the original code review products. We just released Review Board 8, which was a pretty large project (we built Office document review, browser-native spell checking in CodeMirror, a new interdiff filtering algorithm, Forgejo integration, and a bunch of other things).
So now I'm working on plans for Review Board 9, with a goal of releasing within the next 4-6 months. Got some thoughts on how the review process can be rethought for this current era of development, so starting work on that.
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Project mention: Understanding Backpropagation: Calculating Gradients for Hidden Layer Weights and Biases | dev.to | 2026-06-30
Hello, I'm Ganesh. I'm building git-lrc, an AI code reviewer that runs on every commit. It is free, unlimited, and source-available on Github. Star git-lrc on GitHub to help more developers discover the project. Do give it a try and share your feedback for improving the product.
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Claude-Command-Suite
Professional slash commands for Claude Code that provide structured workflows for software development tasks including code review, feature creation, security auditing, and architectural analysis.
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code-review-checklist
This code review checklist helps you be a more effective and efficient code reviewer.
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ai-codereviewer
AI Code Reviewer: Enhance your GitHub workflow with AI-powered code review! Get intelligent feedback and suggestions on pull requests using OpenAI's GPT-4 API, improving code quality and saving developers time.
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agentsys
AI writes code. This automates everything else · 24 plugins · 49 agents · 44 skills · for Claude Code, OpenCode, Codex, Cursor, Kiro.
Project mention: Show HN: My way – 18-agent autonomous workflow for ClaudeCode – issues to deploy | news.ycombinator.com | 2026-01-17 -
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cpp-project
Boiler plate template for C++ projects, with CMake, Doctest, Travis CI, Appveyor, Github Actions and coverage reports.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Code Review discussion
Code Review related posts
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Show HN: R3 – A Local Code Review Tool for You and Your AI Agent
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Local codereview tool for handing structured review to agent
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Why AI code review hallucinates — and the two gates that fix it
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Show HN: Open-source guided code reviews
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I'm opening VSCode less and less every day
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An open-source AI Product Builder now ships compliance-reviewed software for 5 regulated industries
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Understanding Backpropagation: Calculating Gradients for Hidden Layer Weights and Biases
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jul 2026
Index
What are some of the best open-source Code Review projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | octotree | 23,192 |
| 2 | code-review-graph | 19,357 |
| 3 | gitpod | 13,741 |
| 4 | react-doctor | 13,498 |
| 5 | pr-agent | 11,962 |
| 6 | open-code-review | 10,304 |
| 7 | reviewdog | 9,435 |
| 8 | DeepAudit | 6,591 |
| 9 | danger | 5,685 |
| 10 | danger-js | 5,487 |
| 11 | vscode-pull-request-github | 2,599 |
| 12 | cargo-crev | 2,316 |
| 13 | mutant | 2,167 |
| 14 | Review Board | 1,717 |
| 15 | git-lrc | 1,428 |
| 16 | Claude-Command-Suite | 1,307 |
| 17 | kodus-ai | 1,218 |
| 18 | code-review-checklist | 1,046 |
| 19 | policy-bot | 1,031 |
| 20 | ai-codereviewer | 1,021 |
| 21 | agentsys | 889 |
| 22 | vet | 652 |
| 23 | cpp-project | 622 |
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