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Greptile 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
Greptile from $30/seat/mo, What the Diff from $19/mo — different billing units, so no direct winner
Free plan
Both have one
Public API
Greptile has one; not confirmed by us for What the Diff
Higher Trust score
What the Diff — 91 vs 85 for Greptile
Best fit
Greptile: Teams whose bugs come from cross-file coupling rather than local mistakes · What the Diff: Teams whose pull request descriptions are habitually empty or one line long

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

GreptileIndexes the whole repo, then reviews pull requests with cross-file context rather than diff-only context.What the DiffWrites your pull request descriptions from the diff and posts them back to GitHub or GitLab

Side by side

FactGreptileWhat the Diff
CategoryCode Review & QualityCode Review & Quality
Pricing modelFreemiumFreemium
Starts at$30/seat/mo$19/mo
Public APIYesNot confirmed
Trust score85 / 10091 / 100
PlatformsWeb, APIWeb
CompanyTabnam, Inc.Beyond Code GmbH
Launched2023—
Last verifiedOct 15, 2026Oct 15, 2026

What our research says

Greptile

The full-repo index is the difference that matters - it flags cross-file breakage that diff-only reviewers miss entirely. Billing only for developers who actually got a review that month is a fairer meter than flat per-seat. The 50 credits per seat go quickly on an active team, and $1 per extra review is where the real bill forms.

Pros

  • Indexes the whole codebase, so reviews carry cross-file context
  • Learns from the PR comments your team already writes
  • Seats bill only for developers who actually received a review that period
  • GitHub and GitLab plus an MCP server, an API and a self-hosting option

Cons

  • Credit model means an active repo will exceed the 50 included reviews per seat
  • Overage at $1 per review adds up quietly on a busy month
  • Free tier is capped at a single active developer

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 Greptile if you need

  • Teams whose bugs come from cross-file coupling rather than local mistakes
  • Enforcing repo-specific conventions through custom rules
  • Orgs that need self-hosted review for code that cannot leave their network

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

Greptile vs What the Diff: the questions people ask

Is Greptile cheaper than What the Diff?

They charge in different units, so there is no like-for-like answer: Greptile starts at $30/seat/mo, What the Diff at $19/mo. Entry price is the lowest paid plan as we last verified it.

Does Greptile or What the Diff have a free tier?

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

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

Greptile 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.

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