Your AI-powered code review assistant

What The Diff helps you and your team writing better pull request descriptions, reviewing and merging them faster and even keep your non-technical team members in the loop.

Create your accountWorks with GitHub and Gitlab.
No credit card required.

Instant Code Refactoring

A lot of time is spent on code reviews with back and forth between the reviewer and the author - often about minor changes that could be done automatically.

Just comment on the lines of code that should be refactored with /wtd and describe the changes that you want. What The Diff will then suggest the changes in the pull request and you can accept them with a single click.

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Pull request summaries

What The Diff translates the diff of your pull requests into a summary that you can paste into your changelog or share with your team to show your progress. It doesn’t include technical jargon and is easily understandable by your whole team and your clients.

The unique combination of machine learning and the processing with multiple AI models makes code changes accessible to everyone and so you can keep everyone in the loop without lifting a finger.

From wip to summary

Save hours of your time by letting What The Diff generate a summary of your pull requests.

No more trying to understand "wip" commits or "fixes" in the pull request title.

What The Diff understands the context of your changes and will help you understand what - and more importantly why - the changes were made.

Fine grained controls

What The Diff provides granular controls about it's usage.
  • You control which repositories we see and which are enabled
  • We only analyze the diff if you request it in a pull request description
  • You choose which files should be included/excluded from the summary
  • Generate comments on-demand

Reporting and Notifications

Pull requests are the pulse of your development team and What The Diff translates them to status notifications and weekly reports automatically. Keep everyone in the loop without manually writing updates – without too much technical jargon.
Notification are only read if they are delivered to the right inbox. What The Diff allows you to receive notifications in Slack, per email or via a custom webhook.


We've helped countless teams to improve their code review and continuous integration process. This is what they have to say.

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Frequently asked questions

If you have anything else you want to ask, reach out to us.

    • What is What-the-Diff?

      What-the-Diff is an AI-powered app that reviews the diff of your pull requests and writes a descriptive comment about the changes in plain english.

    • What are tokens?

      We process the git diff of your pull requests to generate a descriptive comment. Big diffs need more tokens for processing. Average pull requests are ~2,300 tokens.

    • How does What the Diff work?

      Our application uses the GitHub/Gitlab API to get the diff of your pull request and then uses an AI model to generate a description of the changes. We don't store your code.

    • Why do you need full access to my code?

      Unfortunately, there is no GitHub/Gitlab permission to only read the diff of a pull request. We need full access to your code to be able to read the diff.

    • Does it work with all languages?

      Yes, we support nearly all programming languages and the AI is able to explain the diff in plain english – or one of the other languages that we support.

    • What happens if I run out of tokens?

      If you run out tokens, you can upgrade to a bigger plan or wait until your next billing cycle. We don't upgrade your plan automatically.

    • Is it 100% accurate?

      The AI is still in beta so we can’t guarantee that every summary is 100% correct. We recommend trying the free version yourself!

    • Do you store my code?

      We don't store your code nor does any of our 3rd party services. We only use the GitHub/Gitlab API to read the diff of your pull requests.

    • Is it free?

      You can use the free plan as long as we provide it and upgrade to a paid plan if you need more tokens or want to use it on multiple repositories.

    • Do keep unused tokens add up?

      Unused tokens do not roll over to the next month, so make sure to select the smallest plan and upgrade when needed. You can always downgrade to a smaller plan.

    • How do I cancel my subscription?

      Simply log into our platform and click on the “Cancel Subscription” button. You can also change your plan or downgrade to the free version.

    • Do you train your AI model with my code?

      We don't do that and couldn't do that if we wanted – because we don't store your code or diff of your pull request at all.