What The Diff

AI GitHub app that turns PR diffs into plain-English summaries, changelogs and inline refactor suggestions.

Freemium Coding & Development
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What is What The Diff?

What The Diff is an AI-powered GitHub and GitLab app focused on the code review experience. It reads the diff of a pull request and writes a plain-English summary, so reviewers no longer decode vague commit messages like 'wip' or 'fixes'. PR descriptions can be auto-generated from shortcodes (summary, joke, poem), comments update as the PR evolves, and typing /wtd on a line triggers AI refactoring suggestions that can be accepted in one click. It also generates changelogs, weekly progress reports and stakeholder notifications, without storing user code or diffs.

Key features

  • AI-generated PR descriptions from shortcodes
  • PR summary comments that update with new commits
  • Inline AI refactoring via /wtd comments
  • Public changelogs with JSON API
  • Weekly progress reports
  • Summary notifications in multiple languages
  • Does not store code or diffs

Pros

  • Saves reviewers hours decoding unclear PRs
  • Non-technical stakeholders can follow changes
  • Privacy-friendly: no code or diff storage
  • Free plan with monthly token allowance

Cons

  • Token-based limits on the free tier
  • Diff-only view without deep codebase context
  • Some shortcodes are gimmicky rather than useful

What The Diff at a glance

PricingFreemium
CategoryCoding & Development
Platformsweb
Official websitewhatthediff.ai
pull requestsdiff summarychangelogcode reviewgithubgitlab

How to choose the right Coding & Development tool

The right coding tool depends on where you write code and how much of your codebase it can understand. IDE integration is the first filter — a tool that lives in your editor, sees your project files and respects your stack will help far more than a general chatbot you paste snippets into. Look for accurate completions, clear explanations of suggested changes, and strong refactoring and debugging support for your main languages. Privacy deserves real attention: check whether your code is used for training, and whether a self-hosted or enterprise option exists for sensitive projects. Price against the hours it actually saves — most developers feel the difference within the first week of real use.

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What The Diff FAQs

What is What The Diff?

What The Diff is an AI-powered GitHub and GitLab app focused on the code review experience. It reads the diff of a pull request and writes a plain-English summary, so reviewers no longer decode vague commit messages like 'wip' or 'fixes'. PR descriptions can be auto-generated from shortcodes (summary, joke, poem), comments update as the PR evolves, and typing /wtd on a line triggers AI refactoring suggestions that can be accepted in one click. It also generates changelogs, weekly progress reports and stakeholder notifications, without storing user code or diffs.

What are the main features of What The Diff?

What The Diff offers AI-generated PR descriptions from shortcodes, PR summary comments that update with new commits, Inline AI refactoring via /wtd comments, Public changelogs with JSON API, Weekly progress reports, Summary notifications in multiple languages and Does not store code or diffs.

How much does What The Diff cost?

What The Diff follows a freemium model: a free tier is available, and paid plans unlock higher limits and advanced features. Check its official website for current plan prices.

What are the pros and cons of What The Diff?

Strengths of What The Diff include Saves reviewers hours decoding unclear PRs; Non-technical stakeholders can follow changes; Privacy-friendly: no code or diff storage. On the downside, Token-based limits on the free tier; Diff-only view without deep codebase context; Some shortcodes are gimmicky rather than useful.