Diamond by Graphite
Graphite's AI code review agent that comments only on real logic, security, and performance issues in your GitHub pull requests, with one-click fixes.
Pick Diamond if your team reviews stacked PRs on GitHub and has already walked away from a noisy AI reviewer. The under-5% negative comment rate is the pitch, and having one-click fixes committed from the thread plus Code Tours' unified view across a stack means the output lands in your merge workflow instead of becoming a scroll-past comment. Teams on GitLab or Bitbucket should stop here — Diamond is GitHub only. If you only need the reviewer and not the stacking/merge tooling, weigh it against a standalone reviewer before paying $40/user/mo billed annually for Team.
Verified 2d ago · liveness 81/100 · cite: rightaichoice.com/tools/diamond-by-graphite
- GitHub teams shipping often who want bug-catching AI review without reviewer fatigue
- Engineering orgs running stacked PRs that need coherent cross-PR review via Code Tours
- Dev teams that want their style guides and OWASP/a11y rules enforced on every PR
- Teams that tried a noisy AI reviewer and abandoned it
- Teams on GitLab, Bitbucket or other non-GitHub hosts — Diamond is GitHub-only
- Solo developers needing unlimited free AI review — Hobby caps AI reviews and Chat
- Small teams unwilling to reach $40/user/mo billed annually for unlimited AI reviews and customizations
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Skip Diamond if most of your code lives on GitLab or Bitbucket, or if you want unlimited AI review without paying $40/user/mo billed annually for the Team plan.
Hobby and Starter both cap AI reviews and Graphite Chat, so the plan you start on stops being enough as your PR volume grows and the real price becomes Team at $40/user/mo billed annually.
Hobby is free but caps AI review; Starter at $20/user/mo billed annually fits small teams shipping production code; Team at $40/user/mo billed annually is the real buying tier because unlimited AI reviews and custom rules only exist there. Teams that only need PR review without stacking, merge queue and automations may find a standalone reviewer costs less per seat.
In short
Diamond by Graphite — Graphite's AI code review agent that comments only on real logic, security, and performance issues in your GitHub pull requests, with one-click fixes. Best for GitHub teams shipping often who want bug-catching AI review without reviewer fatigue, Engineering orgs running stacked PRs that need coherent cross-PR review via Code Tours, Dev teams that want their style guides and OWASP/a11y rules enforced on every PR. Free to start; paid plans from $20/user/mo.
No head-to-head comparison for Diamond by Graphite yet — the alternatives below are the closest matches we list.
What's new in Diamond by Graphite
Checked 2 days agoAcross the latest 2 updates: 2 launches.
Introducing Code Tours
Code Tours lets you review changes across multiple stacked pull requests in one unified view, so a stack reads as a single coherent change instead of isolated diffs.
Introducing Cursor Cloud Agents in Graphite
Cursor Cloud Agents are integrated into Graphite so developers can create, review and ship code without leaving the pull request.
What people actually say about Diamond by Graphite — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
12 mentions across 2 sources (YouTube, Lemmy) · researched Oct 11, 2026.
Weighted by the 14 posts each of 2 sources contributed.
- +One-click suggested fixes let developers commit AI-recommended changes directly from the PR thread
- +Runs on every GitHub pull request within seconds, rather than on-demand only
- +Threaded comments target only findings — avoids littering the whole diff
- +Ships templates for OWASP, Airbnb, PEP8, a11y, Google Java/TS, Ruby, Go
- +Code Tours unify reviews across stacked pull requests into one coherent view
- −Zero genuine community feedback exists in the supplied data to validate any claim
- −GitHub is the only supported code host — unusable for GitLab or Bitbucket teams
- −The under-5% negative comment rate is vendor-reported and unverified by users
- −Unlimited AI review requires the $40/user/mo Team plan billed annually
- −Starter tier caps Graphite Chat and AI reviews, limiting real evaluation
- • Annual billing required on Team tier increases upfront commitment
- • Engineer time spent writing and maintaining custom rules to suppress noise
- • Migration/configuration effort if already using a competing reviewer
Viability Score
How well maintained and how widely used is Diamond by Graphite? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: October 2026
How we score →Key Features
- Instant AI review on every GitHub pull request, returned in seconds
- One-click suggested fixes committed directly from the PR thread
- Claimed under 5% negative comment rate from benchmark tests
- Detects logic bugs and potential edge cases
- Detects security issues, including GitHub access tokens exposed in logs
- Flags performance problems such as an await inside Promise.all
- Detects accidentally committed code and documentation mismatches
- Custom review rules written in plain language
- Built-in rule templates: OWASP, Airbnb JavaScript, a11y, PEP Python, Google Java, Google TypeScript, Airbnb Ruby, Google Go
- Filters that suppress comment types such as naming nits
- Code Tours: unified review across multiple stacked pull requests
- Cursor Cloud Agents: create, review and ship without leaving the PR
- AI-generated PR titles and descriptions
- Suggested fixes bundled with end-of-review CI summaries
- Stack-aware PR insights and team insights
About Diamond by Graphite
Diamond is Graphite's AI code review agent, now surfaced in-product as Graphite Chat. You authorize it against GitHub in one click, and it reviews every pull request in seconds. Rather than commenting on everything, it leaves threaded comments only on findings it treats as real: logic bugs, edge cases, security problems such as GitHub access tokens written to logs, performance drags like an awaited call inside Promise.all that breaks parallelism, accidentally committed code, code style drift, and documentation mismatches. Each comment ships with a suggested change you can commit straight from the thread, plus a CI summary at the end of the review. Custom rules are how you cut noise. You write your team's standards in plain language or start from templates shipped in the product — OWASP, Airbnb JavaScript, a11y accessibility, PEP Python, Google Java, Google TypeScript, Airbnb Ruby, and Google Go — and filters suppress comment types you don't want, naming nits for instance. Graphite claims a negative comment rate under 5% from benchmark tests. Two newer pieces extend it past a single PR. Code Tours, announced April 2026, stitches changes across stacked pull requests into one unified review view so a stack reads as one coherent change. Cursor Cloud Agents, announced March 2026, are integrated into Graphite so you can create, review, and ship without leaving the PR. The shipping-side tooling — stacked-PR CLI, VS Code extension, MCP, PR inbox, merge queue, automations, team insights — is where Diamond differs from a standalone reviewer bolted onto GitHub. It's for engineering teams already on GitHub who want bug-catching AI review without reviewer fatigue. The trade-off is narrow platform reach: GitHub only. Unlimited Graphite Chat and unlimited AI reviews sit on the Team plan at $40/user/mo billed annually; Starter at $20/user/mo billed annually caps both.
Behind the Verdict
Diamond's real differentiator is not the review output itself — plenty of tools comment on pull requests — but that the review sits inside the tooling that produces and merges those PRs. Graphite's stacked-PR CLI, VS Code extension, MCP server, PR inbox and merge queue all feed the same product, which is what makes Code Tours possible: the AI can reason about a stack of dependent PRs as one change rather than reviewing each diff in isolation. If your team already stacks, that is a meaningful advantage nothing standalone easily replicates. The second strength is noise control. Graphite publishes concrete numbers — 1,482 PRs reviewed, 281 issues that led to fixes, 3.5% comments downvoted — and the product gives you two levers to push that number down further: plain-language custom rules (with OWASP, Airbnb JavaScript/Ruby, a11y, PEP Python, Google Java/TypeScript/Go templates) and filters that suppress whole comment categories like naming nits. Teams that abandoned a noisy AI reviewer should start here, because the failure mode they hit is the one Graphite is explicitly tuned against. The mechanical loop is also right. Comments arrive as threaded findings with a suggested change you commit from the thread; CI summaries close out the review. No context switch to a separate dashboard, no copy-pasting a diff into a chat window. Cursor Cloud Agents (March 2026) extend this so you can create, review and ship without leaving the PR. Weaknesses are worth being blunt about. Platform reach is the big one: this is a GitHub product, end to end. If any meaningful share of your code lives on GitLab, Bitbucket or a self-hosted host without GHES, Diamond is not an option. The AI itself is gated by plan: Hobby and Starter both carry "Limited" Graphite Chat and "Limited" AI reviews, and AI review customization — automations, filters, rules — plus merge queue only open up on Team at $40/user/mo billed annually. That is a real step up from Starter's $20/user/mo billed annually if the custom rules are the reason you're buying. Enterprise adds GHES, SAML/SSO, ACLs, SIEM audit log, custom analytics and private uploads at custom pricing. Where it fits: GitHub-native teams shipping continuously, running stacked PRs, with a written style guide or compliance rules they want enforced on every PR, and someone willing to maintain the rules and filters over time. Where it doesn't: teams on other hosts, solo developers who need unlimited free AI review (Hobby caps it), or small teams that will never get to Team pricing.
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Real-world workflow fit
Concrete scenarios for the personas Diamond by Graphite actually fits — and what changes day-one when you adopt it.
Open a five-PR stack, then use Code Tours to read the whole change as one unified view while Graphite Chat comments on the individual PRs with logic and edge-case findings.
Outcome: The stack gets reviewed once, coherently, instead of five disconnected diffs, and each accepted suggested fix is committed from its thread.
Load the OWASP and Airbnb JavaScript templates on Team, add plain-language rules for internal conventions, and set filters so naming nits are suppressed.
Outcome: Every new PR is checked against the same standards automatically, and reviewers stop spending cycles on style comments.
Connect Cursor Cloud Agents to Graphite, then create, review and ship the change without leaving the pull request.
Outcome: Review feedback, fixes and the merge all happen in the PR, with AI-generated PR titles and descriptions and a CI summary closing out the review.
Use Cases
- Catch logic errors and security vulnerabilities on a PR before the code reaches production
- Enforce team coding standards on every PR with custom rules written in plain English
- Cut review cycles by accepting AI-suggested fixes with one click from the PR thread
- Reduce reviewer fatigue by filtering out non-critical comments like naming nits
- Get contextual AI feedback across stacked PRs, understanding dependencies between changes
- Review a multi-PR feature rollout in one view with Code Tours
- Create, review and ship code without leaving the PR using Cursor Cloud Agents
- Automate the review and merge workflow with merge queue, automations and CI summaries
Models Under the Hood
as of 2026-10-16
Limitations
- Graphite Chat access and AI review volume are both capped on Hobby (free) and Starter ($20/user/mo billed annually); unlimited Chat, unlimited AI reviews and AI review customization (automations, filters, rules) all require Team at $40/user/mo billed annually.
- Advanced merge queue settings, custom analytics, ACLs, SAML/SSO, SIEM audit log, private uploads and GHES support are Enterprise-only at custom pricing.
- The whole product is built around GitHub pull request workflows — there is no GitLab or Bitbucket path.
- Accuracy claims (under 5% negative comment rate, 3.5% comments downvoted) come from Graphite's own benchmarks.
- Rules and filters need a human maintaining them as your standards change.
as of 2026-10-20
Verification history
We have re-verified Diamond by Graphite 18 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-checked, vendor evidence unchanged
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-checked, vendor evidence unchanged
Showing the 6 most recent of 18 verification passes.
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Diamond by Graphite tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Hobby
$0/mo
Ideal for
Solo developers reviewing personal-account repos who want to try AI review without paying.
What this tier adds
Free starting tier: personal account repos, CLI for stacked PRs, MCP and VS Code extension, with limited Graphite Chat and limited AI reviews.
Starter
$20/user/mo billed annually
Ideal for
Small teams shipping production code on GitHub organizations who need team-wide review basics.
What this tier adds
Adds all GitHub Organization repos, Slack notifications and team insights over Hobby; Chat and AI reviews stay limited.
Team
$40/user/mo billed annually
Ideal for
Growing teams whose PR volume and standards require unlimited AI review plus custom rules and automations.
What this tier adds
Removes the AI caps — unlimited Graphite Chat and unlimited AI reviews — and unlocks AI review customizations, automations, merge queue and advanced integrations.
Enterprise
Custom
Ideal for
Growing organizations with security, compliance and self-hosted GitHub requirements.
What this tier adds
Adds advanced merge queue settings, custom analytics, ACLs, SAML/SSO, SIEM audit log, GHES support, private uploads, premium support and custom contracts.
Where the pricing makes sense
The company stage and team size where Diamond by Graphite's pricing actually pencils out — and where peers do it cheaper.
Hobby is free but caps AI review; Starter at $20/user/mo billed annually fits small teams shipping production code; Team at $40/user/mo billed annually is the real buying tier because unlimited AI reviews and custom rules only exist there. Teams that only need PR review without stacking, merge queue and automations may find a standalone reviewer costs less per seat.
Setup time & first value
How long it actually takes to get something useful out of Diamond by Graphite — broken out by persona, not the marketing-page minute.
Roughly three minutes to first review: one-click GitHub authorization with no config files. Expect another session to write custom rules and set filters if you want noise tuned — that is Team-tier work, and the template library (OWASP, Airbnb JavaScript, PEP Python and the rest) shortens it.
Switching to or from Diamond by Graphite
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From a standalone AI reviewer on GitHub: authorize Graphite against the repo, then rebuild your review preferences as plain-language rules plus filters on Team.
- →From manual GitHub review: install the GitHub connection, then adopt the stacked-PR CLI or VS Code extension at whatever pace your team wants.
- →From GitHub's native stack tooling: map your existing stacks to Graphite's stacking CLI and queue with the docs' step-by-step setup.
- ↗To a non-GitHub host: nothing carries over directly — Diamond's review, stacking and merge tooling are all GitHub-bound, so expect a rebuild on the new platform.
- ↗To a standalone reviewer: export your rules as plain text, since custom rules are written in natural language rather than a proprietary format.
Integrations
Resources & Guides
- Documentationgraphite.dev
Overview
Full product docs from graphite.dev
- Documentationgraphite.dev
Setup And Configuration
Full product docs from graphite.dev
- Documentationgraphite.dev
Review Comments
Full product docs from graphite.dev
- Documentationgraphite.dev
Customization
Full product docs from graphite.dev
- Documentationgraphite.dev
Experimental
Full product docs from graphite.dev
- Guidegraphite.dev
Graphite Guides
Guides for Graphite
Tutorials & Learning
YouTube returned 6 videos for “Diamond by Graphite”, and we withheld 6: 6 did not mention Diamond by Graphite. We are showing none, because we could not prove any of them are about Diamond by Graphite.
Official links
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Common stack mates teams adopt alongside Diamond by Graphite, with the specific reason each pairing earns its keep.
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Frequently Asked Questions
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