Best AI Code Review Tool for Development Teams 2026
Quick Comparison
| CodeRabbit | Greptile | Graphite | |
|---|---|---|---|
| Best For | Teams adopting AI code review for the first time who want a genuinely free tier before paying for private-repo coverage. | Teams whose bugs regularly stem from interactions with code outside the pull request's changed lines. | Teams already working in a stacked-PR style who want AI review depth built into that specific workflow. |
| Pricing | Free tier available / Pro $15/mo/contributor ($12/mo annual) / Pro Plus $30/mo ($24/mo annual) | From $30/mo (50 review credits/seat included) | Free tier available / Starter $20/user/mo / Team $40/user/mo |
| Winner | Our Pick |
Tool Breakdown
CodeRabbit
CodeRabbit balances cost and capability best for most teams: a genuinely free tier for public repos and open-source work, a $15/mo/contributor entry price for private repos, and configurable line-by-line reviews across four major Git platforms. Greptile and Graphite both win on specific needs — full-codebase context and stacked-PR workflows, respectively — but neither is the safer general-purpose default for a team just adopting AI code review.
- Free tier covers unlimited public and private repos for PR summaries, plus fully free line reviews on open-source and public repos
- Works across four major Git platforms rather than locking teams into one ecosystem
- 14-day free trial of the deeper Pro Plus tier requires no credit card
- Reviews the diff rather than indexing the full codebase, so some cross-file issues can be missed
- Full private-repo line reviews require a paid Pro or Pro Plus subscription
Greptile
Greptile is an AI code review agent that indexes the entire codebase — not just the diff — for full-context PR review, supporting GitHub and GitLab with a self-hosting option.
- Full-codebase indexing catches cross-file issues that diff-only review tools are structurally unable to see
- Self-hosting option available for teams that need code to stay inside their own infrastructure
- Fee waivers for qualifying MIT/Apache-licensed open-source projects and pre-Series-A startups
- No general free tier — every seat is $30/mo with 50 review credits included, additional credits at $1 each
- Narrower platform support (GitHub/GitLab) than CodeRabbit's four-platform coverage
Graphite
Graphite is a code review and stacked-PR platform for fast-moving engineering teams, with an AI agent ('Graphite Diamond') that flags bugs, security and performance issues, and documentation gaps.
- Free Hobby tier supports up to 10 open stacks across 3 repos for individuals and small teams
- Stacked-PR workflow tooling goes beyond what CodeRabbit or Greptile offer for teams that split large changes into dependent PRs
- Team plan adds unlimited AI reviews/chat, automations, and a merge queue
- Free tier's AI review and chat access is limited compared to the paid Starter and Team plans
- Most value is realized by teams that adopt the stacked-PR workflow style — less differentiated for teams that don't
Frequently Asked Questions
Which AI code review tool has the best free tier? +
CodeRabbit and Graphite both offer meaningful free tiers — CodeRabbit for unlimited public/private repo summaries plus free line reviews on open-source projects, and Graphite's Hobby tier for up to 10 open stacks across 3 repos. Greptile has no general free tier, starting at $30/seat/mo, though it does waive fees for qualifying open-source and pre-Series-A startup projects.
Is Graphite still independent after being acquired by Cursor? +
Graphite was acquired by Cursor in December 2025 but continues to operate and price as a standalone product. Existing customers migrate to the current Team-plan pricing structure after their first renewal following January 8, 2026 — worth checking current terms before assuming older pricing still applies.
Do any of these tools review more than just the changed lines in a PR? +
Yes — Greptile is built specifically around this: it indexes the entire codebase before reviewing a pull request, letting it catch issues caused by code the diff doesn't touch. CodeRabbit and Graphite both focus primarily on the PR's diff, with Graphite adding stacked-PR-aware context across a related chain of changes.