Free AI code reviews, right inside your GitHub files
This is our editors' assessment out of 5, not an average of user ratings. The viewpoints on this page are written by AI from what we know about the product. They are not customer reviews.
According to OpenAITools.app telemetry verified on 2026-11-11, MATE: AI Code Review (chromewebstore.google.com) is an AI platform indexed under AI Code Review generating 0 monthly visits with a month-over-month traffic delta of +0 (0.0%). Its primary geographic market is Global (— traffic share), and it operates on a Free pricing model. Top competing alternatives by monthly volume include CodeRabbit (1.05M visits/mo), ERNIE Comate (503.25K visits/mo), VS Code (7.4M visits/mo).
Instantly spots messy code without leaving the GitHub file view.
Super lightweight extension that just works.
Zero clutter, exactly what I need during code reviews.
Sometimes struggles with massive files over a thousand lines.
AI-synthesized perspectives grounded in live site inspection, pricing structure, and category benchmarks — presented as editorial viewpoints rather than individual customer testimonials.
A single button on GitHub file pages sends your code to the AI reviewer and returns feedback in seconds.
Runs directly where you already read code, so there is no copy-pasting into a separate chat or dashboard.
Suggestions explain reasoning and best practices, helping developers learn rather than just patching issues.
All features are unlocked from install with no paywall, credit system, or trial period.
No API keys, repository hooks, or CI setup are required — install and start reviewing.
MATE: AI Code Review is a lightweight Chrome extension built for developers who want a second pair of eyes on their code without switching tools, setting up CI pipelines, or paying for a subscription. It installs into your browser and quietly waits until you open a file inside a GitHub repository. At that point a dedicated "AI Code Review" button appears, and one click sends the code off for analysis.
The extension is positioned as a mentorship tool rather than a strict linter. Its goal is to explain what could be improved and why, so newer developers can learn from the suggestions instead of simply being told a rule was broken. Feedback covers functionality, efficiency, and adherence to common best practices, and it arrives almost instantly thanks to fast server-side processing.
MATE is completely free to use, requires no account creation, and works entirely on top of GitHub — there is nothing to configure and no repository setup needed. Because it operates as a companion layer rather than a platform, it complements, rather than replaces, full code-review platforms and CI-based static analysis. The extension is distributed through the Chrome Web Store by indie developer Artem Palevich.
Get grounded explanations of what could be improved in your code, turning each review into a small mentorship session.
Run a quick AI pass over files you just edited to catch obvious issues before committing or opening a pull request.
Get a quick quality and efficiency read on files in a repository you are exploring for the first time.
Study open-source repositories on GitHub and use MATE to understand why certain patterns are preferred.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | MATE: AI Code Review | 0 | — | — | Free | Current |
| 1 | CodeRabbit | 1.05M | +4.6% | 32% direct | Freemium, Free Trial, Paid, Contact for Pricing | vs CodeRabbit |
| 2 | ERNIE Comate | 503.25K | -39.5% | 8% direct | Freemium | vs ERNIE Comate |
| 3 | VS Code | 7.4M | -3.8% | 29% direct | Freemium | vs VS Code |
| 4 | CodeGPT | 170.06K | -19% | 54% direct | Freemium, Paid, Contact for Pricing | vs CodeGPT |
| 5 | Refact.ai | 40.17K | -20.8% | 14% direct | Freemium | vs Refact.ai |
| 6 | CodeReviewBot.AI | 2.52K | +97.1% | 40% direct | Freemium, Free Trial, Paid, Contact for Pricing | vs CodeReviewBot.AI |
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