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About
WhatTheDiff AI is an intelligent code review assistant designed to streamline the pull request workflow for development teams. By connecting directly to GitHub or GitLab, it analyzes code diffs and automatically generates clear, descriptive PR descriptions — saving developers the time and effort of writing them manually. Beyond automated descriptions, WhatTheDiff AI sends rich summary notifications that translate technical changes into plain English, making it easy for non-technical stakeholders like product managers or executives to stay informed. The tool also generates beautiful public changelogs (consumable via JSON API) and delivers weekly progress reports summarizing all changes across the team. One of its standout features is inline AI refactoring, which allows reviewers to suggest and apply code improvements directly during the review process rather than leaving vague comments for others to interpret. Fine-granular configuration options let teams skip CI pull requests, delay draft PRs, and manage token consumption to suit their workflow. WhatTheDiff AI supports virtually all programming languages and does not store any source code — diffs are processed in real time and discarded. It uses a token-based pricing model with a free tier to get started, making it accessible to small teams and scalable for larger organizations. It's ideal for dev teams that want faster, more transparent, and more inclusive code review processes.
Key Features
- Automated PR Descriptions: Automatically generates clear, detailed pull request descriptions from code diffs, eliminating the manual effort of writing them.
- Rich Summary Notifications: Sends simplified, plain-English summaries of code changes to keep non-technical stakeholders informed without overwhelming them with technical jargon.
- Inline AI Refactoring: Suggests and applies code improvements directly within the review process, going beyond comments to actively assist with refactoring.
- Automated Changelogs: Generates public-facing changelogs from pull request history, consumable via a JSON API for internal or external use.
- Weekly Progress Reports: Delivers weekly digest summaries of all code changes across the team, providing a high-level view of development activity.
Use Cases
- Development teams wanting to automatically generate descriptive pull request summaries and save time during code reviews.
- Engineering managers who need to keep non-technical stakeholders updated on development progress without manual reporting.
- Teams looking to produce automated, public-facing changelogs from their pull request history with minimal effort.
- Reviewers who want to suggest and apply inline code refactoring improvements during the PR review process.
- Organizations requiring weekly executive summaries of all development activity across multiple repositories.
Pros
- Saves Developer Time: Automates the tedious task of writing PR descriptions and summaries, freeing developers to focus on actual coding.
- Bridges Technical and Non-Technical Teams: Plain-English change summaries keep product managers, designers, and executives in the loop without requiring them to read code.
- Privacy-Conscious: Does not store source code or diffs; all processing is ephemeral, making it safer for sensitive codebases.
- Supports All Languages: Works with virtually any programming language, making it suitable for polyglot teams and diverse tech stacks.
Cons
- Token-Based Limits: Usage is capped by a monthly token allowance; large pull requests consume more tokens, and unused tokens do not roll over.
- Requires Full Repository Access: Due to GitHub/GitLab API limitations, the app requires full code access even though it only reads diffs, which may concern security-sensitive teams.
- GitHub and GitLab Only: Currently limited to GitHub and GitLab integrations, with no support for other version control platforms like Bitbucket or Azure DevOps.
Frequently Asked Questions
What is WhatTheDiff AI?
WhatTheDiff AI is an AI-powered application that reviews the diff of your pull requests on GitHub or GitLab and writes a descriptive comment explaining the changes in plain English.
Does WhatTheDiff store my source code?
No. WhatTheDiff does not store your code or diffs. The diff is fetched via the GitHub/GitLab API, processed to generate descriptions, and immediately discarded. No third-party services store your code either.
Does it work with all programming languages?
Yes, WhatTheDiff supports nearly all programming languages. The AI model explains code diffs in plain English (or other supported languages) regardless of the language used.
What happens if I run out of tokens?
If you exhaust your monthly token quota, you can upgrade to a larger plan or wait until your next billing cycle resets. Plans are not upgraded automatically.
Does WhatTheDiff AI train its models on my code?
No. WhatTheDiff does not train AI models on your code, and since it does not store your code or diffs, it has no ability to do so.
