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CodeRabbit vs What the Diff

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Entry price
CodeRabbit from $24/seat/mo, What the Diff from $19/mo — different billing units, so no direct winner
Free plan
Both have one
Public API
CodeRabbit has one; not confirmed by us for What the Diff
Best fit
CodeRabbit: Teams reviewing high volumes of AI-generated pull requests · What the Diff: Teams whose pull request descriptions are habitually empty or one line long
Platforms
CodeRabbit: Web, VS Code extension · What the Diff: Web

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

CodeRabbitAI reviewer that comments on GitHub and GitLab pull requests, triages them by risk and flags security issuesWhat the DiffWrites your pull request descriptions from the diff and posts them back to GitHub or GitLab

Side by side

FactCodeRabbitWhat the Diff
CategoryCode Review & QualityCode Review & Quality
Pricing modelFreemiumFreemium
Starts at$24/seat/mo$19/mo
Public APIYesNot confirmed
Trust score92 / 10091 / 100
PlatformsWeb, VS Code extension, APIWeb
CompanyCodeRabbit, Inc.Beyond Code GmbH
Launched2023—
Last verifiedOct 16, 2026Oct 15, 2026

What our research says

CodeRabbit

The most sensible fit is a team merging a steady stream of agent-generated PRs that no human can fully read. The catch is the fair-usage meter: even paid seats are capped at a handful of PR reviews per developer per hour, and the bot's default verbosity takes tuning.

Pros

  • Installs on GitHub/GitLab in minutes and starts commenting immediately
  • Free forever for public open-source repositories
  • Review surface extends to IDE and CLI, not just the PR page
  • Learns team conventions over time and applies them to later reviews

Cons

  • Per-hour review caps apply on every tier, including Enterprise
  • Comment volume can feel noisy until you tune it down
  • API access and self-hosting are locked behind the Enterprise tier

What the Diff

It removes a small repetitive chore well — PR descriptions and changelogs get written without anyone thinking about it — and the free tier is enough to judge that on real repositories. The catch is a token meter tied to diff size, so a handful of large refactors can drain a month's allowance and push a team up the $19 to $199 ladder.

Pros

  • Works with both GitHub and GitLab through their APIs
  • Public changelog plus weekly reports for people outside the codebase
  • Four Pro sizes up to an unlimited plan, so heavier teams have a step up
  • Free tier covers roughly ten pull requests a month

Cons

  • Token cost tracks diff size, so spend is hard to predict on large changes
  • Needs full repository access, because GitHub and GitLab offer no diff-only permission
  • Unused tokens expire monthly

Which one fits

Choose CodeRabbit if you need

  • Teams reviewing high volumes of AI-generated pull requests
  • Open-source maintainers, since public repos are reviewed free
  • Organizations that want review, PR triage and security scanning from one vendor

Choose What the Diff if you need

  • Teams whose pull request descriptions are habitually empty or one line long
  • Keeping non-technical stakeholders informed without hand-written release notes
  • Small repositories where the free monthly token budget covers normal flow

CodeRabbit vs What the Diff: the questions people ask

Is CodeRabbit cheaper than What the Diff?

They charge in different units, so there is no like-for-like answer: CodeRabbit starts at $24/seat/mo, What the Diff at $19/mo. Entry price is the lowest paid plan as we last verified it.

Does CodeRabbit or What the Diff have a free tier?

Both: CodeRabbit has a free tier, and What the Diff has a free tier.

Which has a public API, CodeRabbit or What the Diff?

CodeRabbit ships a public API, as of our last verification. A public API for What the Diff is not confirmed by us — check its developer docs before you plan an integration.

More comparisons

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