Graphite is a New York-based developer-tools company reimagining code review for the age of AI-generated code. Its core innovation is a workflow built around 'stacked' pull requests, where engineers break large changes into a series of small, dependent PRs that can be reviewed and merged independently. This addresses a long-standing friction point in trunk-based development, where large diffs slow review and increase the chance of bugs slipping through. Graphite layers a stack-aware merge queue, automated reviewer assignment, and software engineering intelligence (SEI) analytics on top of the GitHub workflow developers already use.
In March 2025 the company introduced an AI code review agent (originally launched as Diamond, later folded into the Graphite Agent) that automatically inspects pull requests, flags likely bugs, surfaces security and logic issues, and leaves inline comments with suggested fixes. The motivation is structural: AI coding assistants like Cursor, Claude Code, and Devin have multiplied the amount of code produced, and traditional human review processes cannot keep pace with that volume.
The platform is engineered for high-throughput teams at companies including Shopify, Snowflake, Figma, and Perplexity, where review latency directly affects shipping velocity. Graphite combines its CLI, web dashboard, and GitHub app so that engineers can manage stacks, track review status, and monitor team productivity in one place.
Graphite has attracted notable backing from Anthropic's ecosystem and leading venture firms, reflecting investor conviction that code review is becoming a strategic chokepoint as AI writes more software. The company positions itself not as a replacement for human reviewers but as a force multiplier that handles routine validation so engineers can focus on architecture and intent.