What The Diff
AI assistant for pull request summaries, refactoring, and changelogs.
At a glance
- Editor score6.0 / 10
- PricingFree plan · paid from $19/mo
- Best forTeams mainly needing PR summaries and changelogs
- Free planYes
- AI code reviewNo
- Facts checked26 Sep 2026
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
Our verdict on What The Diff
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 pricing
All 2 What The Diff plans and prices →
What The Diff fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| AI code review | No |
| Automated fixes | Yes |
| CI failure triage | Not verified |
| Git host support | Multiple |
| Deployment options | Cloud |
| Review rules | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | |
| Built for | Small business, Mid-market (editorial estimate) |
| Integrations | 5 integrations: GitHub, GitLab, Slack, Webhooks, Email |
| Pricing | Free plan · paid from $19/mo (source) |
| Website | whatthediff.ai |
| Facts checked | 26 Sep 2026 |
What The Diff integrations
What The Diff lists 5 integrations on its own site.
- GitHub
- GitLab
- Slack
- Webhooks
Alternatives to What The Diff
- Claude Code ReviewA GitHub-focused, multi-agent reviewer for teams that want prioritized inline feedback.3.0
- CodeRabbitBroad PR review automation, with configurable checks and one-click fixes across major code hosts.6.0
- QodoCross-platform AI review with governance depth, but no permanent free tier.5.0
See all What The Diff alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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