Cursor acquires Graphite to fix the review bottleneck

AI can now write code in seconds, but approving and merging all those changes is quickly becoming the ultimate engineering bottleneck.

AI coding platform Cursor announced it is acquiring Graphite, a startup specializing in AI-driven code review and developer workflows. Graphite will continue to operate independently under its existing team while gradually integrating directly into Cursor.

While the financial terms were not officially disclosed, Axios reported that Cursor paid well above Graphite’s previous $290 million valuation, which was set after a $52 million Series B round earlier this year.

Unblocking the review pipeline

Writing code with AI is fast, but AI-generated code is often buggy, leaving human engineers stuck spending hours reviewing and correcting pull requests.

Cursor already offers its own AI review tool called Bugbot, but Graphite brings a completely different workflow superpower known as stacked pull requests. This allows developers to create and work on multiple dependent code changes in parallel without waiting around for prior approvals.

Graphite says its platform is used by hundreds of thousands of engineers across top tech organizations. Cursor noted that the boundary between where developers write code and where they collaborate has become arbitrary, and collapsing that gap will speed up software delivery.

A network of common backers and acquisitions

Behind the deal is a web of shared Silicon Valley connections. Cursor co-founder and CEO Michael Truell originally met Graphite’s co-founders, Merrill Lutsky, Greg Foster, and Tomas Reimers, as a fellow Neo Scholar through Ali Partovi’s venture firm Neo, which later backed Graphite at the seed stage.

Both startups also count heavyweight venture firms Accel and Andreessen Horowitz as shared investors.

Cursor, which hit a massive $29 billion valuation in November, has been on an aggressive acquisition streak. PitchBook data shows Cursor acquired talent from AI CRM startup Koala in July, followed by tech recruiting firm Growth by Design last month. Meanwhile, competitors in the AI code review space are also raising fast, with CodeRabbit valued at $550 million in September and Greptile securing a $25 million Series A this fall.

Why it matters

For developers, writing code at lightning speed means very little if it sits in review limbo for days. By combining Cursor's code generation with Graphite's stacked PR workflow, engineering teams should be able to move multiple features forward simultaneously without context switching or waiting on blockers.

For the AI devtools industry, the battlefield is moving past autocomplete into end-to-end software delivery. GitHub Copilot has a massive structural advantage because it natively lives inside GitHub's pull request ecosystem. We think Cursor's acquisition is a necessary and aggressive move to prevent GitHub from locking up the collaboration layer.

The clever part is keeping Graphite independent while weaving its review engine into local development. That said, as AI floods repositories with exponentially more pull requests, stacking them even higher could easily create deeper dependency tangles and review fatigue if human oversight fails to keep up.