Best AI Code Review Tools

Greptile is our top pick because the independent numbers back it up. On Martian's online Code Review Bench snapshot from 30 July 2026, it had the best F1 score (60.8%) and the best precision (76.2%) of any tool. Precision matters: when three in four comments are worth acting on, developers keep reading them.

Greptile indexes your whole repository, so it can spot a change that breaks code in another file, not just problems inside the diff. You can teach it team rules, and it learns from which comments get resolved.

The pricing is simple but has a ceiling. Pro is $30 per seat per month with 50 review credits each. Busy teams that open many PRs, or that use the deeper 'trex' review (3 credits), will pay $1 per extra credit.

Pick it if you run on GitHub or GitLab and bug-catching quality is your top priority. Skip it if you need Bitbucket or Azure DevOps, or you want a flat bill with no usage overages.

CodeRabbit is the default choice for most teams. It says it is the most-installed AI app on GitHub, with 17,000+ customers and 6 million repositories. On Martian's July 2026 snapshot it scored 57.5% F1 and had the highest recall (51.6%) of the top five, so it finds a lot. The trade-off is precision: 64.9%, versus 76.2% for Greptile, which means more comments you will dismiss.

The product goes beyond comments. It writes PR walkthroughs, ranks PRs by risk (P0 to P3), runs linters and security scanners, and the Team plan can generate unit tests and fix merge conflicts. You also get IDE and CLI reviews before you push.

Pricing went up in 2026. Essentials now starts at $24 per developer per month on annual billing, and the Team tier with pre-merge checks is $48. Open-source maintainers still pay nothing for public repos.

Pick it if you want broad integrations, a free plan for public code and a tool your developers have probably used before. Skip it if noise is your main complaint about AI reviewers, or if budget is tight and you only need basic PR comments.

Codex code review is the best value on this list. Listed on Martian as the ChatGPT Codex Connector, it scored 59.4% F1 in the 30 July 2026 snapshot, just 1.4 points behind Greptile, with 73.3% precision. And it costs nothing extra if your team already pays for ChatGPT: GitHub reviews use your plan's normal Codex allowance.

Setup is light. Connect GitHub in Codex, then comment @codex review on a PR or switch on automatic reviews for a repo. You add team rules in a Code Review Rules section of your AGENTS.md file. When Codex flags a bug, you can reply @codex fix the P1 issue and it opens a fix. A deeper Security Review is in research preview.

The weak spots are workflow features. There is no PR risk triage, dashboards are thin compared with CodeRabbit, and it is GitHub-only. Heavy use can also hit your plan's usage limits, which you share with all other Codex work.

Pick it if you are on ChatGPT Plus, Pro or Business and live on GitHub. Skip it if you are on GitLab or Bitbucket, or need a reviewer with admin analytics and fixed monthly capacity.

Bugbot is Cursor's PR reviewer, and it is built to hunt real bugs rather than comment on style. Cursor says 80% of the bugs Bugbot flags at default effort are fixed before merge, and that its high-effort mode finds 35% more bugs at the same rate. These are vendor numbers; Martian's public top-five snapshot does not break out Bugbot, so we score it a notch below the benchmark leaders.

The big 2026 change is price. Since 8 June 2026, Bugbot is billed per review, typically $1 to $1.50 depending on PR size, instead of $40 per seat. That is cheaper for small or slow-moving teams, but a team that opens 40 PRs per developer per month will pay about the same as before. You can pick default or high effort per repo, or write custom logic that decides.

Bugbot Rules let you encode team standards, and flagged issues can be sent to Cursor's editor or cloud agents to fix. Cursor also owns Graphite, and the two now connect.

Pick it if your developers already use Cursor. Skip it if you want a flat, predictable monthly bill or a reviewer that does not assume a Cursor workflow.

Claude Code Review is the most thorough reviewer here, and the most expensive. When a PR opens, Anthropic runs several agents in parallel, each hunting a different kind of bug. A verification step then checks each finding against how the code actually behaves before anything is posted. Results arrive as inline comments tagged Important, Nit or Pre-existing.

Anthropic's own numbers are strong: internally, the share of PRs getting substantive review comments rose from 16% to 54%, and fewer than 1% of findings were marked wrong by engineers. Large PRs (over 1,000 lines) got findings 84% of the time. These are vendor claims, and the tool is not in Martian's published top five, so treat them with care.

Cost is the catch. An average review runs $15 to $25 and takes about 20 minutes. Reviewing on every push multiplies that. Use the 'Once after PR creation' or 'Manual' trigger and set a monthly cap. A REVIEW.md file lets you tune severity, cap nits and skip generated code.

Pick it if you ship risky changes (payments, auth, infrastructure) and a missed bug costs far more than $25. Skip it if you open hundreds of small PRs a week, use GitLab without CI setup, or need Zero Data Retention.

Copilot code review is the easiest reviewer to switch on: if your team uses GitHub and pays for Copilot, you can add Copilot as a reviewer on any PR. GitHub says it has run more than 60 million reviews.

It got much better in 2026. In March it moved to an agentic design that pulls in related code and directory structure before commenting, which GitHub says cuts false positives. Since July 2026 it can also call agent skills (a SKILL.md under .github/skills) and MCP servers, so it can check your internal standards and tools.

On Martian's online benchmark, Copilot was tested but did not reach the published top five, so it trails Greptile, Codex and CodeRabbit on measured accuracy. Billing also got more complex on 1 June 2026: each review now uses AI Credits and, on private repos, GitHub Actions minutes.

Pick it if you are all-in on GitHub and want a solid first pass with no new vendor. Skip it if catching subtle bugs is the goal; pair it with, or replace it by, a dedicated reviewer.

Qodo is the enterprise-grade option. In March 2026 it reported topping Martian's benchmark with a 64.3% F1 score, but read the fine print: that was its 'Extended' research-preview mode. Its standard production reviewer scored 47.9% in the same test. So the number most teams will actually get is well below Greptile or Codex.

Where Qodo shines is control. It has a strong rules system, dashboards, IDE plug-ins, and Enterprise options that few rivals match: single-tenant or on-prem deployment, bring-your-own-key (BYOK) and audit logs. It also grew out of the open-source PR-Agent project, which many teams still self-host.

Pricing is credit-based. The $30 Pro Team base covers up to 30 users, and credits are pooled at $0.012 each. Qodo's own guide says 2,500 credits buys about 18 reviews, which works out to roughly $1.65 per review.

Pick it if you are a regulated or security-sensitive company that needs on-prem review and fine-grained rules. Skip it if you want the best out-of-the-box accuracy per dollar, or a free plan.

cubic is the surprise of the 2026 benchmarks. The small startup placed third on Martian's 30 July snapshot with 58.7% F1 and 72.6% precision, ahead of CodeRabbit and just behind Codex.

It lets you build custom review agents (five on Team, ten on Pro), each focused on a rule or risk area, plus private wikis that give the reviewer context about your system. It also writes PR descriptions and links to Jira, Linear and Asana.

The downside is price and reach. At $40 per developer per month for Team and $99 for Pro, it costs more than Greptile or CodeRabbit's entry tiers, and line limits (40,000 per developer on Team) can bite on large refactors. We could only confirm GitHub support.

Pick it if you are a GitHub startup that wants top-three accuracy and likes the idea of custom review agents. Skip it if you are price-sensitive, on GitLab or Bitbucket, or want a free tier.

Graphite is a code review platform first and an AI reviewer second. Its core idea is stacked PRs: splitting a big change into a chain of small PRs that are easier to review and merge in order. It adds a faster PR inbox, a merge queue and an AI reviewer, first launched in March 2025 under the Diamond name.

Cursor agreed to buy Graphite in December 2025. Graphite kept its brand, and by early 2026 Cursor's cloud agents could open, review and ship PRs inside Graphite. For Cursor shops, that makes Graphite plus Bugbot a joined-up stack.

As a pure bug-finder, Graphite's AI reviewer did not make Martian's published top five, and unlimited AI reviews need the $40 Team plan. That is the same price as cubic's entry plan, which scored higher on accuracy.

Pick it if your team wants stacked PRs and a merge queue, with AI review as a bonus. Skip it if you only want the best AI reviewer; a dedicated tool will catch more for less.

Sourcery is the budget pick. For $12 per developer per month on annual billing, you get AI reviews on private repos, PR summaries and diagrams, one-click fixes and custom review rules. Public repositories are free forever, which makes it a good fit for open-source maintainers.

It also does a few things bigger rivals charge more for. It can auto-approve low-risk PRs, and the $24 Team plan adds nightly security scans across up to 50 repositories. Enterprise buyers can self-host and bring their own model keys.

We rank it last among our ten because we found no recent independent accuracy data for it, and it does not appear in Martian's published top results. In our view it works best as a solid first pass, not as the main safety net for complex systems.

Pick it if you are a small team or solo developer who wants useful AI review for the price of a lunch. Skip it if you are shipping complex, high-risk code and need the strongest bug detection.