> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cubic.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> cubic is the top-ranked AI code reviewer on Code Review Bench for complex codebases on GitHub.

<CardGroup cols={2}>
  <Card title="Install the AI code reviewer" icon="rocket" href="https://cubic.dev/sign-up">
    7 days free, no credit card required.
  </Card>

  <Card title="Talk to an engineer" icon="calendar" href="https://cubic.dev/paul">
    Learn more about cubic and how it works.
  </Card>
</CardGroup>

<Note>
  **Independent benchmark**: cubic is the [top-ranked AI code
  reviewer](https://www.cubic.dev/blog/cubic-is-the-best-ai-code-reviewer-on-martian-s-benchmark) on
  [Code Review Bench](https://codereview.withmartian.com/?mode=offline).
</Note>

## Key features

* **Spots bugs and improvements**: Comments on bugs and improvements in pull requests
* **Auto-resolve threads**: Enable automatic thread resolution to close findings when the issue is fixed
* **Learns from you**: Improves over time by learning from your feedback
* **PR summaries**: Generates PR descriptions based on code changes
* **Custom agents**: Enforce your team's coding standards
* **Coding agents**: Generate fixes when requested, using your configured provider

<img src="https://mintcdn.com/cubic-2/ShUaZcDyEhB-G1ZC/ai-review/images/example-review.png?fit=max&auto=format&n=ShUaZcDyEhB-G1ZC&q=85&s=a866cf95962b8d4892ce1c619fbdc8b5" alt="Example review" className="border border-zinc-800 rounded-lg" width="1948" height="1538" data-path="ai-review/images/example-review.png" />

## Getting started

<Steps>
  <Step title="Install cubic and start your free trial">
    Sign up at [cubic.dev/sign-up](https://cubic.dev/sign-up). This will guide you through
    installing the cubic GitHub App on the repositories you want to analyze.
  </Step>

  <Step title="Open a new pull request">
    Once installed, cubic automatically reviews new pull requests. See [example reviews for PostHog,
    n8n, and more](https://cubic.dev/examples).
  </Step>

  <Step title="Learn the workflow">
    Follow the [Developer Quickstart](/ai-review/quickstart) to run your first review and respond to
    findings.
  </Step>
</Steps>

<Tip>
  Want cubic inside Cursor, Claude Code, Codex, or another coding agent? Start with [Connect cubic
  to your IDE](/ide/agent-setup) and [Local CLI review](/ide/cli-review).
</Tip>

<Note>
  **Existing pull requests**: Reviews for new PRs start automatically. To review a PR that was
  opened *before* you installed the app, comment: `@cubic-dev-ai review this PR`.
</Note>

## Security and privacy

* **No third-party model training:** Our AI providers are contractually prevented from using your code to train their models.
* **SOC 2 compliant:** We are SOC 2 Type I compliant.

For more details, see our full [Privacy & Security documentation](/account/privacy-security).

## Frequently asked questions

<AccordionGroup>
  <Accordion title="Do you support Gitlab or Bitbucket?">
    Not yet. We currently only support **GitHub**.
  </Accordion>

  <Accordion title="What languages do you support?">
    cubic is language-agnostic and supports all popular programming languages, including JavaScript,
    TypeScript, Python, Go, Ruby, PHP, Java, C#, C/C++, Rust, Kotlin, and Swift.
  </Accordion>

  <Accordion title="What AI models do you use?">
    cubic uses multiple model providers, with different models for different review tasks.
  </Accordion>

  <Accordion title="Will cubic also check large PRs?">
    If a pull request contains more than 200 eligible files, cubic selects up to 200 of the
    highest-priority eligible files for this review.
  </Accordion>

  <Accordion title="Does cubic have up-to-date knowledge of libraries?">
    Yes. cubic has access to library and framework documentation to check APIs and deprecations
    during reviews.
  </Accordion>
</AccordionGroup>

## Next steps

* [**Developer Quickstart**](/ai-review/quickstart): Hands-on tutorial for interacting with AI reviews.
* [**Review in cubic**](/code-review-platform/overview): Read PRs in review order, take a guided tour with AI chat, and submit your review.
* [**Connect cubic to your IDE**](/ide/agent-setup): Install cubic in Cursor, Claude Code, VS Code, Codex, Gemini CLI, or another coding tool.
* [**Local CLI review**](/ide/cli-review): Add the advanced local-review loop before you push.
* [**Key features**](/ai-review/key-features): Discover what the AI reviewer can do.
* [**Custom review rules**](/ai-review/custom-agents): Tailor the AI to your team's coding standards.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.