What The Diff
AI assistant that writes pull request descriptions, summaries, changelogs and reports for GitHub and GitLab repositories.
At a Glance
About What The Diff
What The Diff is an AI-powered assistant from Beyond Code that reads the diff of a pull request and writes a plain-English description of the changes. It connects to GitHub or GitLab accounts and also produces summary notifications, changelogs and weekly progress reports.
What It Is
What The Diff is a pull request assistant. It uses the GitHub/GitLab API to fetch a pull request's diff, then an AI model generates a descriptive comment explaining what changed. The site states it supports nearly all programming languages and can explain diffs in English or other supported languages.
Outputs and Workflow
Beyond PR descriptions, the product offers simplified, translated summary notifications for non-technical stakeholders, a public changelog that can also be consumed via a JSON API, and weekly progress reports covering a week of changes. Inline AI refactoring lets reviewers refactor code during review instead of only leaving a comment. Settings allow skipping CI pull requests, delaying draft ones and limiting token consumption.
Data Handling
The FAQ says code is not stored by What The Diff or its third-party services, and that diffs are not used to train models. It notes that GitHub and GitLab have no read-only-diff permission, so full code access is requested. Processing is token-based, with larger diffs using more tokens.
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Pricing
Free
The free plan has a limit of 25,000 tokens per month but already gives you great value for your team.
- Unlimited repositories
- Inline code refactoring
- 25,000 tokens / ~10 PRs
- Rate limited
- No credit card required
Pro – 200k
Priority email support and a limit of 200,000 tokens per month (~40 PRs). Selectable tiers: 200k, 500k, 1.5M, Unlimited tokens.
- 200,000 tokens per month (~40 PRs)
- Unlimited repositories
- Instant code refactoring
- Slack, Webhook and Email notifications
- Priority email support
- Higher token tiers available: 500k, 1.5M, Unlimited
Capabilities
Key Features
- Automated PR descriptions
- Rich summary notifications for non-technical stakeholders
- Public changelogs with JSON API
- Weekly progress reports
- Inline AI refactoring during review
- Fine-grained settings (skip CI PRs, delay drafts, limit token use)
- Multi-language diff explanations