Cubic vs Greptile vs Graphite — AI Code Review Comparison

Three AI code review tools competing for engineering teams in 2026 take fundamentally different approaches. Cubic uses repository-wide analysis with micro-agent architecture to catch cross-file bugs, trusted by teams like cal.com and n8n. Greptile builds complete dependency graphs of entire codebases for the deepest context-aware reviews available. Graphite combines stacked PRs with an AI review agent that maintains under 3% unhelpful comment rate.

analyzed by Raşit Akyol March 30, 2026

Cubic Greptilewinner Graphite

Cubic reviewGreptile reviewGraphite review

Verdict

Greptile wins for AI-driven pull request comprehension by indexing entire multi-repository codebases into a semantic knowledge graph, enabling pull request reviews that evaluate downstream system impacts across microservices. While Graphite excels at stacked diff developer workflows and Cubic focuses on automated PR triage, Greptile’s deep architectural context prevents cross-service regressions that localized diff scanners miss. Our pick: Greptile.

Quick Comparison

Feature	Cubic	Greptile	Graphite
Pricing	GitHub-native AI code review and automated one-click fix assistant. Starter tier is $0/mo for open-source and public repos (20–40 PRs/mo). Team tier ($30/developer/mo, or $24 billed annually) provides unlimited AI PR reviews, one-click code fixes, cubic.yaml custom rules, Ultrareview deep reasoning mode, and Jira/Slack/Linear integrations. Enterprise tier offers custom pricing for full codebase deep scans, Confluence sync, SAML SSO, SOC 2 Type II compliance, and dedicated SLAs.	AI-powered codebase intelligence and automated pull request review platform. Starter is $0/mo for 1 active developer with unlimited repositories and 50 review credits/mo. Pro is $30/developer/month including 50 review credits per seat/mo (1 credit per standard review, 3 credits per TREX sandboxed runtime execution review; extra credits at $1/credit), Greptile REST API & MCP server access, and custom rules context. Pre-Series A startups get a 50% discount. Enterprise tier provides custom pricing for on-premise/VPC deployments (Docker/Kubernetes), SAML SSO, SOC 2 Type II compliance, custom SLAs, and dedicated worker fleets.	Graphite provides a free Hobby tier for personal repositories. Commercial team plans start at $20/user/month for Starter and $40/user/month for Team with unlimited AI reviews and merge queues, alongside custom Enterprise agreements.
Pricing Model	Freemium	Freemium	Freemium
Platforms	GitHub, all major programming languages	GitHub, GitLab, VS Code, Slack, Jira	GitHub, VS Code, CLI, Slack
Open Source	No	No	No
Telemetry	Clean	Clean	Clean
Status	Active	Active	Active
Editorial Pick	—	—	—
Last Verified	Sep 6, 2026	Sep 6, 2026	Aug 26, 2026
Description	Cubic is an AI-powered code review platform used by teams at cal.com and n8n that organizes complex PRs by grouping files logically (Backend → API → UI) and provides an AI walkthrough of changes. At paid/team pricing should be verified in Cubic’s current purchase flow; it solves the jumpiness problem in large pull requests where reviewers lose context hopping between unrelated files, offering one-click fixes and custom rule enforcement.	Greptile is a Y Combinator-backed AI code review tool that builds a semantic graph of your codebase's functions, classes, and dependencies. Unlike diff-only reviewers, it is built to catch cross-file issues, architectural drift, and convention violations. Supports GitHub, GitLab, Jira, Slack, and VS Code. Offers cloud and self-hosted VPC deployment with SOC2 Type II compliance. Used by 250+ companies including Stripe and Amazon.	Graphite is an AI-powered developer productivity platform that combines stacked pull requests with intelligent code review. Its AI agent catches real bugs with an under 3% unhelpful comment rate and offers one-click fixes directly in the PR flow. The stacked PR workflow breaks large changes into smaller, sequenced diffs that merge independently, keeping developers unblocked. Includes a stack-aware merge queue, CLI tool, VS Code extension, unified PR inbox, and deep GitHub integration.

Cubic

Pricing: GitHub-native AI code review and automated one-click fix assistant. Starter tier is $0/mo for open-source and public repos (20–40 PRs/mo). Team tier ($30/developer/mo, or $24 billed annually) provides unlimited AI PR reviews, one-click code fixes, cubic.yaml custom rules, Ultrareview deep reasoning mode, and Jira/Slack/Linear integrations. Enterprise tier offers custom pricing for full codebase deep scans, Confluence sync, SAML SSO, SOC 2 Type II compliance, and dedicated SLAs.
Pricing Model: Freemium
Platforms: GitHub, all major programming languages
Open Source: No
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Sep 6, 2026
Description: Cubic is an AI-powered code review platform used by teams at cal.com and n8n that organizes complex PRs by grouping files logically (Backend → API → UI) and provides an AI walkthrough of changes. At paid/team pricing should be verified in Cubic’s current purchase flow; it solves the jumpiness problem in large pull requests where reviewers lose context hopping between unrelated files, offering one-click fixes and custom rule enforcement.

Greptilewinner

Pricing: AI-powered codebase intelligence and automated pull request review platform. Starter is $0/mo for 1 active developer with unlimited repositories and 50 review credits/mo. Pro is $30/developer/month including 50 review credits per seat/mo (1 credit per standard review, 3 credits per TREX sandboxed runtime execution review; extra credits at $1/credit), Greptile REST API & MCP server access, and custom rules context. Pre-Series A startups get a 50% discount. Enterprise tier provides custom pricing for on-premise/VPC deployments (Docker/Kubernetes), SAML SSO, SOC 2 Type II compliance, custom SLAs, and dedicated worker fleets.
Pricing Model: Freemium
Platforms: GitHub, GitLab, VS Code, Slack, Jira
Open Source: No
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Sep 6, 2026
Description: Greptile is a Y Combinator-backed AI code review tool that builds a semantic graph of your codebase's functions, classes, and dependencies. Unlike diff-only reviewers, it is built to catch cross-file issues, architectural drift, and convention violations. Supports GitHub, GitLab, Jira, Slack, and VS Code. Offers cloud and self-hosted VPC deployment with SOC2 Type II compliance. Used by 250+ companies including Stripe and Amazon.

Graphite

Pricing: Graphite provides a free Hobby tier for personal repositories. Commercial team plans start at $20/user/month for Starter and $40/user/month for Team with unlimited AI reviews and merge queues, alongside custom Enterprise agreements.
Pricing Model: Freemium
Platforms: GitHub, VS Code, CLI, Slack
Open Source: No
Telemetry: Clean
Status: Active
Editorial Pick: —
Last Verified: Aug 26, 2026
Description: Graphite is an AI-powered developer productivity platform that combines stacked pull requests with intelligent code review. Its AI agent catches real bugs with an under 3% unhelpful comment rate and offers one-click fixes directly in the PR flow. The stacked PR workflow breaks large changes into smaller, sequenced diffs that merge independently, keeping developers unblocked. Includes a stack-aware merge queue, CLI tool, VS Code extension, unified PR inbox, and deep GitHub integration.

What Sets Them Apart

Modern pull request workflows suffer from two fundamental bottlenecks: reviewer fatigue caused by high-volume diffs and undetected architectural regressions across multi-service codebases. Cubic functions as an autonomous conversational AI code review agent directly inside PR discussions. Greptile takes a global graph approach by indexing entire repositories and microservice ecosystems into a semantic knowledge base, evaluating every diff against upstream and downstream symbol dependencies. Graphite approaches the problem from workflow mechanics, pairing a stacked pull request CLI with integrated AI assistance to keep diffs atomic.

Cubic focuses on localized PR conversation threads; Greptile prioritizes structural dependency depth across repos; Graphite enforces stacked diff hygiene for high-velocity trunk-based engineering.

Cubic, Greptile, and Graphite at a Glance

Cubic provides conversational, low-noise PR reviews where developers can debate suggestions and request automated revisions directly in comments.

Greptile indexes git trees, commit histories, and API contracts into semantic vector graphs to review code with staff-engineer-level repository awareness.

Graphite accelerates code review turnaround times via its gt CLI, web client, and automated merge stack synchronization.

Technical Architecture: Semantic Knowledge Graphs vs Stacking Engines

Greptile parses repositories using LSP integrations and AST parsers to construct live knowledge graphs, passing topological context into LLMs to catch cross-module breaking changes.

Cubic utilizes an agentic execution pipeline with multi-stage filtering prompts to separate trivial stylistic changes from critical logic and security bugs.

Graphite tracks commit DAGs locally via gt CLI, automatically propagating rebases downstream across dependent branches.

Developer Experience and Workflows

Cubic minimizes workflow friction through natural GitHub/GitLab comment interactions without requiring custom dashboard context switching.

Greptile delivers high signal-to-noise reviews by eliminating hallucinated false positives through exact runtime definition lookups.

Graphite makes stacked PRs intuitive, allowing developers to submit bite-sized diffs that pass through rapid AI pre-flight checks.

The Bottom Line

Greptile is the overall winner for AI code review, catching cross-file regressions and architectural contract mismatches through its persistent codebase knowledge graph.

FAQ

How does Greptile's full-codebase semantic graph indexing differ from Cubic's PR-focused review architecture?

Greptile indexes the repository's entire AST and symbol hierarchy into a continuous semantic knowledge graph, traversing it during PR reviews to flag downstream API breaking changes across distant modules. Cubic focuses on optimizing the immediate PR review loop, analyzing modified diffs and intent to generate rapid high-signal code summaries.

How does Graphite's stacked PR workflow and merge queue architecture integrate with AI code reviews?

Graphite decomposes large features into small stacked PRs; its AI reviews each 100-line stack layer individually maintaining context from parent branches. Graphite integrates directly with automated merge queues, running CI checks, rebasing dependent branches automatically, and validating AI review policies without manual rebase overhead.

How do Greptile, Cubic, and Graphite maintain context across large monorepos?

Greptile maintains modular sub-graphs spanning package boundaries tracing type definitions to frontend clients. Cubic analyzes modified files and immediate import dependencies to keep LLM token limits focused. Graphite structures monorepo reviews around stacked branches and CODEOWNERS paths per microservice boundary.

What are the latency, API token consumption, and CI cost trade-offs between Greptile, Cubic, and Graphite?

Graphite reviews are processed via background cloud webhooks with minimal CI latency. Cubic provides rapid diff commentary within seconds. Greptile incurs an initial indexing phase and consumes more tokens per review querying its multi-hop graph, providing unmatched depth for complex enterprise codebases.

Sources & verification

Sources checked: September 3, 2026
Content verified: September 3, 2026

Verification dates are editorial checks. Routine CMS saves and automatic updatedAt timestamps do not advance them.