Free
Added on Nov 11,2026
Co-Review is a free, open-source review tool that lets you read a code repository together with the AI coding agent that built it. It opens the entire codebase as a review, so you can read it like a pull request, ask the agent why things are built the way they are, and get to know your code again.
You can comment on a line, range, symbol, function, file, folder or the whole repository, and the agent answers in the thread from the code. Comments are anchored to symbols and Tree-sitter tokens, so they follow the code through edits and are marked outdated instead of drifting.
It supports four kinds of review. A whole-repository audit has the agent write a guide to the code's map, vocabulary, flows, patterns and weak spots, with findings by area. A change review opens the agent's diff as a pull-request page with line comments, suggested edits and one verdict. A pull request review lets the agent take a first pass on someone else's PR before you post your verdict to GitHub. A design review covers an L1, L2, L3 plan with Mermaid diagrams before any code is written.
Key features include an overview page showing where to start, per-area coverage tracking of what you have read, agent findings that you accept or dismiss, a Tree-sitter repository map, an optional code graph via Graphify, and support for opening patch and diff files as pull-request pages.
It is made for Claude Code as a plugin with slash commands and a co-reviewer subagent, has native packages for Pi and Oh My Pi, and works with any MCP agent, including Codex, Cursor, VS Code, Zed, Gemini CLI, OpenCode and Copilot. It is built on Eclipse Theia, so navigation, search, Git and language servers are included, and reviews are stored outside the repository.
Pricing: Co-Review is free and open source, with no telemetry. It installs on macOS and Linux with a single command, and runs as a desktop app or in the browser.
It is suited to developers who build with AI coding agents and want to review, understand and take ownership of agent-written code.
By the PowerfulAI.tools Editorial Team · Updated 11 November 2026 · Researched with AI assistance and checked against the official Co-Review website · How we review tools
Co-Review is listed as free to use. Check Co-Review's website for any usage limits or paid upgrades.
Developers who built much of a codebase with a coding agent and need to re-learn and review it alongside that agent.
On macOS (Apple silicon) and Linux it installs with a curl script that also adds the co-review command, and re-running it updates. Windows uses an installer from the latest GitHub release.
Reviews are stored on your own machine, outside the repository, and comments stay attached to code through later edits.
Popular alternatives to Co-Review include Llama Coder, Codeium and GitHub Copilot. Compare their pricing and what each is best for below.
| Tool | Pricing | Best for |
|---|---|---|
| Llama Coder | Free | Developers and non-coders who want to prototype small web apps from a text description and then inspect or reuse the gen... |
| Codeium | Freemium | Software developers and engineering teams who want AI code completion in their editor plus one place to run, monitor and... |
| GitHub Copilot | Freemium | Developers and engineering teams who want AI completion, chat and background agents inside their editor and GitHub workf... |
| Screenshot to Code | Free | Front-end developers and designers who want a quick first-pass codebase from a screenshot or mockup. |
| ZCode | Paid | Developers who want AI agents built into their development workflow. |
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