WhatTheDiff: AI Pull Request Summaries & Code Review

WhatTheDiff eliminates the tedious task of manually writing pull request descriptions by using AI to analyze code diffs and generate clear, plain-English summaries instantly. Whether you're dealing with a one-line fix or a massive refactor, the tool reads through the changes and produces readable explanations that both technical and non-technical team members can understand, closing the communication gap between engineering and stakeholders. Beyond summaries, WhatTheDiff acts as an active participant in the review process. It generates rich notifications for Slack, email, and webhooks, compiles weekly progress reports, and even offers inline AI refactoring suggestions to catch minor issues before they become bigger problems. By integrating directly with GitHub and GitLab, it slots into existing developer workflows without requiring any changes to how teams already collaborate. Designed with privacy in mind, the tool processes diffs on the fly without storing your source code, making it a practical choice for teams that want AI assistance without compromising on security. From solo developers to full engineering departments, WhatTheDiff turns pull request reviews into a faster, more transparent process.

Sign up by connecting your GitHub or GitLab account. Open any pull request in a connected repository, and WhatTheDiff's AI will automatically generate a summary of the code changes. From there, use the built-in tools to refactor flagged code issues and distribute the summarized notifications to relevant stakeholders via Slack, email, or webhook.