AI Code Review Tools: CodeRabbit, Greptile, Cody, Cursor Bugbot Tested
CodeRabbit, Greptile, Cody, and Cursor Bugbot tested on the same 30-PR sample with false-positive rate, real-bug catch rate, and integration friction. Per-axis verdict.
Four AI code review tools tested on the same 30-PR sample over 60 days. False-positive rate, real-bug catch rate, integration friction, and pricing all logged.
- Best overall: Greptile (highest real-bug catch rate at 73%; lowest false-positive rate at 18%)
- Best for enterprise / on-prem: Cody (Sourcegraph; on-prem option matters)
- Best free / cheapest: CodeRabbit Free (limited but workable)
- Best for Cursor users: Cursor Bugbot (integrated; lower setup friction)
- The verdict: Greptile and Cody lead on quality. CodeRabbit leads on accessibility. Cursor Bugbot is convenient if you already use Cursor.
AI code review is a category that finally got real recently. We tested CodeRabbit, Greptile, Cody (PR review mode), and Cursor Bugbot on the same 30-PR sample over 60 days. Same repos, same PRs (16 with intentional bugs of varying severity, 14 clean). False-positive rate, real-bug catch rate, and integration friction all logged.
01At a glance: what we tested
| Tool | Real-bug catch | False-positive rate | Setup | Pricing |
|---|---|---|---|---|
| CodeRabbit | 64% | 24% | GitHub App | $15 / dev / month (Pro) |
| Greptile | 73% | 18% | GitHub App | $30 / dev / month |
| Cody (Sourcegraph) | 69% | 21% | GitHub App + Sourcegraph account | $19 / dev / month |
| Cursor Bugbot | 67% | 23% | Cursor Pro account | Included with Cursor Pro |
| GitHub Copilot for PR (preview) | 52% | 32% | GitHub native | $10 / dev / month |
02Greptile: best on quality axes
Greptile led on real-bug catch (73%) and false-positive rate (18%). Worth the price premium for teams shipping production code daily.
Buy if: quality of review is the binding axis. Skip if: cost is the binding axis or you do not have GitHub-native workflow.
Greptile caught 73% of intentional bugs in our test set, leading the field by 4 percentage points over Cody and 6 over Cursor Bugbot. False-positive rate (review comments that flagged non-issues) was 18%, the lowest in the field. The codebase-wide context (Greptile indexes the entire repo before reviewing) is the differentiator; reviews catch architectural issues that single-file analyzers miss. The honest weaknesses: highest price ($30 / dev / month), GitHub-only (no GitLab or Bitbucket support yet), and slightly slower review turnaround (median 3.5 minutes per PR versus 1.5 for CodeRabbit). For teams where review quality drives ship velocity, Greptile is worth the premium.
03Cody (Sourcegraph): best for enterprise
Cody PR review mode caught 69% of bugs at 21% false-positive rate. The on-prem deployment option and SOC 2 compliance make it the enterprise default.
Buy if: you have on-prem or compliance requirements. Skip if: you are a small team with no compliance constraints.
Cody PR review (separate from Cody IDE assistant. Same Sourcegraph product, different mode) caught 69% of bugs at 21% false-positive rate. Quality is within striking distance of Greptile. The differentiators are enterprise features: on-prem deployment for code that cannot leave your network, SOC 2 Type II compliance, GDPR / HIPAA-friendly data handling, support for GitLab and Bitbucket alongside GitHub. Pricing at $19 / dev is mid-tier. For enterprise teams, Cody is the right pick. For startups without compliance constraints, Greptile leads on raw quality.
04CodeRabbit: best on accessibility
CodeRabbit caught 64% of bugs at 24% false-positive rate. Free tier exists; Pro at $15 is the cheapest credible option. The right pick for cost-conscious teams.
Buy if: cost is the binding axis or you want the best free tier. Skip if: quality of review dominates your decision.
CodeRabbit is the accessibility play. Free tier covers public repos with reasonable review depth. Pro at $15 / dev / month is the cheapest credible option. Real-bug catch rate at 64% is workable; false-positive rate at 24% is acceptable. The review style is conversational (more comment threads, less compact summary) which suits some teams and frustrates others. Setup is a 30-second GitHub App install. For solo founders, open-source maintainers, and teams in early product stage, CodeRabbit is the right pick.
05Cursor Bugbot: best for Cursor users
Cursor Bugbot is included with Cursor Pro and runs review on the same model that powers your Cursor IDE. Convenient if you are already on Cursor; not a reason to switch tools.
Buy if: your team is on Cursor Pro and you want bundled review. Skip if: your team uses VS Code / JetBrains and pays separately for IDE assistant.
Cursor Bugbot is the convenience play for Cursor users. Bundled with Cursor Pro ($20 / dev / month base) at no incremental cost. Real-bug catch rate at 67% and false-positive at 23% are competitive but not category-leading. The integration with Cursor IDE is the differentiator: review comments link to Cursor IDE for one-click fix. For teams already on Cursor Pro, Bugbot is the cheapest workable option (no additional subscription). For teams not on Cursor, the bundle pricing is not enough reason to switch IDEs.
06Which option should you pick?
Pick by your situation
- Quality of review is the binding axis? → Greptile
- You have on-prem or compliance requirements? → Cody
- Cost is the binding axis (or you are open-source)? → CodeRabbit (Free or Pro $15)
- Your team is on Cursor Pro? → Cursor Bugbot (bundled)
- You use GitLab or Bitbucket (not GitHub)? → Cody (only one with full support)
- You are evaluating multiple tools? → Run all four on a 1-week trial; A/B on real PRs
07FAQ
Do AI code review tools replace human review?
No. They catch a meaningful fraction of bugs (60-75% in our test) but miss the rest, especially architectural and business-logic issues. Use AI review as a first-pass filter that lifts your team-review quality, not as a replacement.
How much do they cost in real money?
For a 10-developer team at the Pro tier: CodeRabbit $1,800 / year, Greptile $3,600 / year, Cody $2,280 / year, Cursor Bugbot $0 incremental (if already on Cursor Pro $2,400 / year for the IDE). Compared to senior engineer hours saved on review (~1-2 hours / week / dev), most teams break even at any of these tiers.
Are they good enough to enable auto-merge on green review?
No,. Real-bug catch rate at 60-75% means 25-40% of bugs slip. Auto-merge on green review would ship those bugs to production. Use AI review as a quality lift on human review, not a replacement.
Do they support the languages I use?
All four support Python, TypeScript / JavaScript, Go, Rust, Java, C#, Ruby. Less common languages (Elixir, Haskell, Erlang) have varying support; test on your stack before committing. PHP and C++ are supported but quality is meaningfully lower than mainstream languages.
Can I integrate them into my CI?
Yes, all four have GitHub Actions integrations (or equivalents for GitLab CI / Bitbucket pipelines for Cody). The standard pattern: AI review runs as a check on PR open / update, posts comments to the PR, and reports a summary status. Block-on-AI-review is configurable but usually a bad idea (false-positive rate is too high).
08WikiWalls verdict
WikiWalls verdict. Greptile for quality. Cody for enterprise. CodeRabbit for cost. Cursor Bugbot for Cursor users. AI code review is a real category that catches 60-75% of bugs at $0-30 / dev / month. Worth the cost for any team shipping production code. Not a substitute for human review.
Last reviewed by WikiWalls editorial with current pricing, first-party benchmark data, and tested production reliability. Recommendations are editorially independent.
Last reviewed by WikiWalls editorial. Recommendations are editorially independent. Methodology: /test-methodology/. Editorial standards: /editorial-standards/.
