Greptile (greptile.com) is an AI-powered code review and codebase intelligence platform built around a single differentiating principle: reviewing a pull request not just against the changed lines, but against the entire indexed codebase. Where most AI code review tools analyse only the diff, Greptile builds a semantic code graph of every file, function, dependency, and relationship in the repository, and uses that full context to evaluate each PR. This enables Greptile to catch bugs, regressions, and architectural violations that depend on code outside the changed files — the class of issues that cause the most expensive production failures.
Founded in San Francisco as a lean 20-person team, Greptile has shipped rapidly: v3 (agent-based reviews) in late 2025 and v4 in early 2026, which brought a 74% increase in addressed comments per PR and a 68% increase in positive developer replies according to internal metrics. A Principal Engineer at Brex described Greptile as functioning "like that one experienced developer on your team who has an intimate understanding of the codebase." The platform integrates directly with GitHub and GitLab and begins reviewing the moment a PR is opened — no manual triggering required.
How Greptile Works
After connecting a GitHub or GitLab repository, Greptile indexes the entire codebase and builds a semantic code graph — mapping relationships between files, modules, functions, and APIs. When a pull request is opened, Greptile automatically reads the diff alongside the indexed codebase context, reasons about how the change interacts with the broader codebase, and posts inline review comments directly on the PR. Comments explain the issue, reference relevant code elsewhere in the repository, and in many cases suggest a fix. The index is updated continuously as code changes, ensuring every review reflects the current state of the codebase. Developers can also query the codebase in natural language through Greptile's chat interface, using it as an interactive knowledge base for onboarding, debugging, and architecture questions.
Key Features
- Full codebase indexing — semantic code graph of the entire repository built at connection time and updated continuously as code changes
- Codebase-aware PR reviews — reviews each pull request against the full codebase context, not just the diff, catching issues invisible to diff-only tools
- Inline GitHub and GitLab comments — posts review comments directly on PR diffs with explanations, referenced code, and suggested fixes
- Natural language codebase queries — ask questions about the codebase in plain English and get contextual answers referencing specific files and functions
- Automatic PR triggering — review starts immediately when a PR is opened, with no manual configuration per PR
- v4 accuracy improvements — 2026 release with 74% more addressed comments per PR and 68% increase in positive developer responses
- Agent-based reviews (v3+) — AI agents reason across multiple files and dependencies to understand systemic impact of changes
- Onboarding acceleration — new developers can query the codebase to understand architecture, dependencies, and conventions without senior developer interruptions
- Security and bug detection — identifies security vulnerabilities and logic bugs that arise from interactions between the changed code and the rest of the codebase
- GitHub and GitLab integration — native PR workflow integration with comment threading, review dismissal, and re-review triggers
Greptile Pricing
- From $30/month — Greptile's entry plan covers codebase indexing, automated PR reviews, inline comments, and natural language codebase queries. Pricing scales with team size, number of repositories, and usage volume. Contact Greptile for team and enterprise pricing details.
Always verify current rates at greptile.com/pricing.
Who Should Use Greptile?
Greptile is best suited for engineering teams working on large or highly interconnected codebases where PR reviews frequently miss bugs that depend on code outside the diff. It is particularly valuable for: teams where senior developers spend significant time in code review; organisations onboarding new developers frequently; and teams that have experienced production incidents caused by issues that were technically correct in the diff but broke existing behaviour elsewhere in the codebase. At $30/month entry pricing, it is accessible to small teams as well as enterprises. Teams with small, simple codebases where diff-only review is sufficient may not see enough ROI to justify the subscription, and teams requiring a higher false positive tolerance should evaluate it alongside alternatives like CodeRabbit before committing.
Frequently Asked Questions
What is Greptile?
Greptile is an AI code review tool that indexes your entire repository and reviews pull requests with full codebase context — not just the changed lines. It posts inline comments on GitHub and GitLab PRs, identifying bugs, security issues, and architectural violations that diff-only tools miss. It also functions as a natural language codebase query tool for developer onboarding and debugging.
How is Greptile different from other AI code review tools?
Most AI code review tools only analyse the changed lines in the diff. Greptile indexes the entire codebase and builds a semantic code graph, then reviews each PR against this full context. This means it can catch bugs and regressions that depend on how the changed code interacts with modules, functions, and APIs elsewhere in the codebase — a class of issues that diff-only tools structurally cannot detect.
Does Greptile work with GitHub and GitLab?
Yes. Greptile integrates natively with GitHub and GitLab. When connected, it automatically starts reviewing a pull request as soon as it is opened, posting inline comments on the diff without any manual triggering. It supports comment threading, review dismissal, and re-review on updated PRs.
How much does Greptile cost?
Greptile's plans start from $30/month. Pricing scales with team size, repository count, and usage volume. Team and enterprise pricing is available by contacting Greptile directly. There is no permanent free plan, though a trial may be available.
What improvements did Greptile v4 bring in 2026?
Greptile's v4 release in early 2026 focused on accuracy and false positive reduction. Internal metrics showed a 74% increase in addressed comments per PR — meaning developers act on Greptile's feedback more often — and a 68% increase in positive developer replies, indicating comments are more relevant and actionable than in previous versions.
