Tools that can perform AI pull request (PR) code reviews on GitHub:

• Copilot
• CodeRabbit
• GitHub Actions

Copilot

Copilot code review requires:

1. Copilot subscription from an organization (1 business seat costs $19 per month)
2. Copilot to be enabled in the organization

To requesting a pull request review from Copilot, open the Reviewers menu and select Copilot.

CodeRabbit

CodeRabbit is a GitHub app that provides AI summaries and code reviews for pull requests.

If you have an open source project, CodeRabbit is free; otherwise, the starting plan costs $15 per month per developer.

GitHub Actions

To create your own GitHub Action that does code review with open source LLMs, you can use pull-request-review:

# .github/workflows/pr-review.yml
on: pull_request
jobs:
  pr-review:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write
    steps:
      - name: PR review
        uses: ai-action/pull-request-review@v1

See example.