What The Diff review
What The Diff turns pull request changes into summaries, reports, and changelogs.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
What The Diff helps development teams explain and communicate pull request changes. It generates descriptions from code changes and can post AI-generated summaries as comments when a pull request is created, updated, or labeled. Teams can also use inline /wtd comments to request refactoring suggestions, create weekly progress reports and shareable changelogs, and send summaries to technical and non-technical colleagues. Its focus is communication around pull requests rather than automated review findings, making it a fit for teams that need clearer summaries and changelogs more than AI code review.
The service supports GitHub and GitLab, and its documentation says each requires a separate account. Slack, email, and webhooks provide routes for notifications and reports. File-pattern inclusion and exclusion rules help teams control which changes are covered. What The Diff is cloud-based and listed for web; the available integrations make it relevant to teams already working across supported Git hosts and notification channels, but not to teams seeking a different host ecosystem.
Pricing is freemium. The Free plan costs $0 per month and includes unlimited repositories and inline code refactoring, which is rate limited. Pro – 200k costs $19 per month and adds instant code refactoring, Slack, webhook, and email notifications, plus priority email support; both plans include unlimited repositories. There is no AI code review, so teams looking for automated review findings should choose another tool. For teams focused on pull request explanations, progress reporting, and changelog generation, the Free plan offers a way to start, while Pro adds faster refactoring and notification options.
What The Diff pros and cons
- Where it wins
- Generates PR descriptions and comments explaining code changes
- Creates weekly reports, shareable changelogs, and a JSON feed
- Works with GitHub and GitLab, plus Slack, email, and webhooks
- Where it doesn't
- Does not provide AI code review findings
- GitHub and GitLab each require a separate account
- Free-plan refactoring is rate limited
What The Diff fact sheet, pricing and score →
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