What the Diff

Overview

What the Diff addresses a specific and common friction point in code review: the time reviewers spend understanding what a PR actually changes before they can evaluate whether it's correct. Rather than requiring reviewers to read through diffs line by line to understand the intent, What the Diff automatically generates plain-English explanations of every PR that describe what changed and why in language both developers and non-technical stakeholders can understand.

The tool is intentionally lightweight — it's not trying to replace deep AI code review platforms. Instead, it complements them by making PRs more accessible and reducing the onboarding time for reviewers who are unfamiliar with the changed code area.

Key Features

• AI PR Summaries: Generates plain-English explanations of what a PR changes and why
• Automated PR Descriptions: Writes structured pull request descriptions automatically
• Stakeholder-Friendly Output: Explains changes in language accessible to non-technical reviewers
• GitHub and GitLab Support: Works as a native app on both platforms
• Instant Setup: No configuration required — install and it starts working immediately
• Changelog Generation: Creates human-readable changelogs from merged PRs
• Token-Based Pricing: Pay for what you use with scalable token-based plans

Pricing Details

• Free: 25,000 tokens/month — sufficient for small teams or evaluation
• Starter: $19/month — 200,000 tokens/month for growing teams
• Unlimited: $199/month — unlimited tokens for large teams with high PR volume

Pros and Cons

Pros

• Instantly reduces reviewer onboarding time for unfamiliar code areas
• Makes PR review accessible to non-technical stakeholders like product managers
• Zero configuration — install and it works immediately
• Affordable pricing for the value provided

Cons

• Focused on summaries and descriptions rather than deep code analysis or bug detection
• Not a replacement for full AI code review platforms
• Token-based pricing can be unpredictable for teams with variable PR volume

Who Should Use This Tool?

What the Diff is ideal for any team that wants to reduce PR review friction without the complexity of a full AI code review platform. It's particularly valuable for cross-functional teams where non-technical stakeholders need to understand code changes, and for teams with high PR volume where reviewer context-switching overhead is significant.

Final Verdict

What the Diff does one thing and does it well: making pull requests immediately understandable. It's a lightweight, affordable complement to deeper code review tools rather than a replacement. For teams where PR description quality and reviewer onboarding speed are pain points, it delivers quick, tangible value.