Understand code changes before you review

Clear, accurate narratives that explain what changed and why.

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Swipe. Comment. Approve.

Read the card

Each card explains one change with a short summary and the associated diff.

Approve or comment

Quickly approve the change or leave a comment for the author.

Next card

Move to the next change. When done, submit your review.

From scattered diffs to coherent understanding

GitHub shows what changed. Margin shows why it matters.

Before: Piecing it together

GitHub PR files view showing raw diffs across multiple files

After: Understanding instantly

Margin narrative interface with synchronized code views

Simple workflow

Integrates seamlessly with your GitHub workflow

Margin starts reviewing immediately

When a PR is opened or updated, Margin automatically starts analyzing the changes

Margin analyzes and generates the narrative

Analysis takes ~10 minutes. Margin reads the code changes and creates an accurate, structured explanation

You get notified

Receive a notification with a link to open the review in the Margin app

Review directly in Margin

Understand the changes, then approve, comment, or request changes—all from within the Margin app

Built for trust

Margin is a read-only analysis tool focused on understanding, not automation

No AI-generated comments on your PRs
No automated approvals or merge decisions
No changes to your GitHub workflow – you still review and merge on GitHub

Build trust through accuracy

Margin provides factual, precise analysis of code changes. Our goal is accuracy and clarity, not opinions or judgments. You make all the review decisions.