Graphite Diamond was the AI code review agent Graphite launched alongside its $52M Series B in March 2025; the Diamond name was deprecated on October 8, 2025 in favor of Graphite Agent, and Graphite itself joined Cursor on December 19, 2025. Facts below verified as of 2026-09-13.
What it is #
Diamond is a case study in brand churn around one capability: AI review inside the Graphite stacked-PR platform, now owned by Cursor. At launch, TechCrunch described Diamond as spun out as a standalone product to catch coding bugs automatically, on top of a review platform whose customers included Shopify, Snowflake, Figma, and Perplexity. The current surface is graphite.com’s AI Reviews page (the graphite.dev domain now redirects there), advertising Graphite Chat with instant reviews, one-click fixes, custom rules, and a claimed sub-5% negative comment rate from benchmark tests. The page still carries legacy copy (“Diamond analyzes every pull request in seconds”), while the homepage no longer mentions Diamond at all.
Status #
The Diamond brand is dead and the company is acquired: treat every Diamond citation you find as historical. Graphite raised a $52M Series B led by Accel in March 2025, with the Anthology Fund (Anthropic and Menlo Ventures), Shopify Ventures, Figma Ventures, a16z, and The General Partnership, bringing it to roughly $81M raised and a $290M valuation. Cursor announced the acquisition on December 19, 2025; terms were undisclosed, and Axios reported a price “way over” the $290M last valuation. Cursor itself joined SpaceX on August 14, 2026 per this section’s Cursor note, so Graphite now sits two acquisitions deep. Hacker News reaction to the deal was large and skeptical: 276 points and 253 comments (46327206), including direct questions about whether the product would be maintained, versus 5 points for the original Diamond launch (43402826).
Strengths #
- Distribution through Graphite’s stacked-PR workflow: the merge queue, inbox, and CLI put AI review where those teams already live.
- Launch customer logos were real engineering organizations (Shopify, Snowflake, Figma, Perplexity), not seed-stage filler.
- AI review ships from the Starter tier, not gated behind enterprise.
- Cursor ownership provides resources and a distribution channel no independent reviewer startup has.
Cautions #
- Three names in nine months (Diamond, Graphite Agent, AI Reviews/Graphite Chat) means every benchmark, doc, or URL you cite needs a date attached.
- The HN maintenance question (“another acquisition for talent or will the product be kept and actively maintained?”) has no authoritative answer as of 2026-09-13, though Graphite now advertises Cursor Cloud Agents on its pricing page, evidence the review product is still being integrated rather than sunset.
- Graphite’s positioning is GitHub-centric, so GitLab teams were never the audience.
- The vendor’s own deprecation banner sits on the launch post that most third-party coverage still links to, which is a broken-citation trap for anyone writing about this category.
Pricing #
Per-seat, with AI review included from the paid tiers, as of 2026-09-13. Hobby is free (personal repos, limited Graphite Chat and AI Reviews), Starter is $20 per user per month billed annually, Team is $40 with unlimited AI Reviews and Graphite Chat plus the merge queue and automations, and Enterprise is custom with SAML, GHES support, and audit logs.
Compared to #
- CodeRabbit: the independent incumbent, multi-forge and CLI-shipping; Graphite’s reviewer rides platform lock-in to stacked PRs instead.
- Greptile: the review-only independent, which is now the differentiator Graphite gave up by selling.
- Qodo: another independent still selling standalone, with an open-source half as insurance against exactly this consolidation.
Bottom line #
Recommended for teams already running Graphite’s stacked-PR workflow that want AI review without adding a vendor. Not for anyone choosing a reviewer on multi-year durability, because the product’s owner has already changed once and second acquisitions happen. My disagreeable take: independent reviewers were always borrowing the code host’s distribution anyway, so consolidation into Cursor is not a betrayal of this category, it is the category reaching its end state, and the other independents should be priced like they know it.
Changes #
- 2026-08-30 - Created in the Code review category with the Diamond deprecation and Cursor acquisition recorded.
See also #
- Code Review Feature Matrix - where Diamond’s successor now sits among the category’s members
- Cursor - the acquirer, itself since folded into SpaceX
- CodeRabbit - the independent incumbent this category keeps consolidating around
- Rethinking Code Review in the Age of LLMs - what review is for when agents write the code
- You Cannot Out-Review a Machine by Hand - why automated review exists at all
References #
https://graphite.com/blog/series-b-diamond-launch - the $52M Series B, the Diamond launch, and the October 8, 2025 deprecation banner
https://techcrunch.com/2025/03/18/anthropic-backed-ai-powered-code-review-platform-graphite-raises-cash/ - Series B investors, roughly $81M total, Diamond as a standalone spinout
https://hn.algolia.com/api/v1/items/46327206 - acquisition thread, 276 points, 251 comments, December 19, 2025