Coding

What The Diff

AI pull request summaries for your team

Visit What The Diff
★4.2ratingPricing · FreemiumRising
The FalcoScan Intel PanelWhat The Diff · Coding
Data updated 2 November 2026
Opportunity
Moderate
Band
Saturation
Contested
Band
Wrapper risk
Elevated
Band
Momentum
Rising
Market trend
Rating
4.2
of 5 · FalcoScan rating

Coding AI has a narrow moat on average, from the moat scores of its rated products. What protects Coding AI tools, and the widest moats

The Brief

What What The Diff does

What The Diff posts a plain-English summary of every pull request to Slack or GitHub. The summaries help reviewers understand what a change does before they open the diff. The listing describes the goal as reviewing code without reading diffs blind. The product is available at whatthediff.ai.

How What The Diff compares with its closest alternatives

All 5 closest alternatives have a free plan, as What The Diff does. Among the 3 that list a starting price, the cheapest is Bito AI at $5 a month and the median is $18.99. 4 of the 5 offer an API; FalcoScan's records show none for What The Diff. What The Diff offers a web app and a Slack app. Of the alternatives, 4 offer a web app and none offers a Slack app. What The Diff was founded in 2022; the alternatives were founded between 2021 and 2023, 3 of them earlier. The alternatives with a known headquarters are in the United States.

Market position · Coding

How What The Diff compares in Coding

What The Diff has moderate opportunity and sits in the bottom third of 501 live Coding tools on FalcoScan. Across Coding, the average opportunity score is 60.4 and the average saturation score 44.4. FalcoScan rates What The Diff's own market position as contested. 154 of the 501 operating Coding tools have hot momentum, and FalcoScan has recorded 16 shutdowns in the category.

What The Diff compared with its closest alternatives
ProductOpportunitySaturationPricingPricing fromFree planAPIPlatformsMomentum
What The DiffFounded 2022ModerateContestedFreemium—YesNoWeb, SlackRising
Pieces OSFounded 2021 · Cincinnati, United StatesModerateContestedFreemium$18.99/moYesYesDesktop, VS CodeRising
Bito AIFounded 2021 · San Francisco, United StatesModerateCrowdedFreemium$5/moYesYesWeb, VS CodeStable
Coderabbit ProFounded 2023 · San Jose, United StatesModerateOpenFreemium—YesYesWebStable
GraphiteFounded 2021 · San Francisco, United StatesModerateContestedFreemium$20/moYesYesWeb, CLIRising
Ellipsis ReviewsFounded 2023HighOpenFreemium—YesNoWebHot

Exact opportunity and saturation scores for all 6 of these, and where each ranks in Coding.

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What it ships with

Capabilities & who uses it

The capabilities What The Diff exposes to builders and the verticals it currently serves.

AI Capabilities
SummarizationCode Generation
Industry Verticals
Software
Tagged

What The Diff shows up when builders search for these

prsummariesslack
Similar tools · Coding

Alternatives to What The Diff

Products still running that do the same job, from the coding market and related ones, closest match first.

See the Coding market
Coding
Pieces OS

Local AI for your developer workflow

★ 4.5Opportunity Moderate
Freemium
Coding
Bito AI

AI code assistant trained on your codebase

★ 4.2Opportunity Moderate
Freemium
Coding
Coderabbit Pro

AI code reviews in plain English

★ 4.5Opportunity Moderate
Freemium
Coding
Graphite

Stacked PRs and AI code review

★ 4.5Opportunity Moderate
Freemium
Coding
Ellipsis Reviews

AI code reviewer that catches real bugs

★ 4.4Opportunity High
Freemium
Coding
Qodo Merge

AI-powered PR review and quality gates

★ 4.4Opportunity Moderate
Freemium
Featured in
Questions

What The Diff: common questions

Is What The Diff free?

What The Diff has a free tier, with paid plans.

What are the best alternatives to What The Diff?

The closest alternatives to What The Diff that are still running, matched on the AI capabilities, uses and audience they share, are Pieces OS, Bito AI, Coderabbit Pro, Graphite, and Ellipsis Reviews.

Is What The Diff still running?

Yes. As of 2 November 2026, FalcoScan lists What The Diff as operating at whatthediff.ai.

Does What The Diff have an API?

FalcoScan's records show no public API for What The Diff.

Who is What The Diff for?

What The Diff is built for developers.

How do I sign in to What The Diff?

Sign in on What The Diff's own website, whatthediff.ai. FalcoScan reviews What The Diff but does not run its accounts, so logins, passwords and billing are handled by What The Diff directly.

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