AI Code Review Tools Compared: What They Cost and What Is Proved

AI code review tools are priced three different ways in October 2026. CodeRabbit charges $24 to $72 per developer per month on annual billing, Graphite charges $40 per user, and GitHub Copilot bills metered AI credits that GitHub estimates at $0.05 to $5 per review. The one independent benchmark we found says no tool catches more than 63% of known issues.

How we compared AI code review tools

The brief was a price and capability matrix built from official documents. We opened each vendor's own pricing and documentation pages on 13 October 2026. Where a number would not load or a page showed no date, we say so in the text.

Agents write more code than people can read. Faros AI telemetry puts median time in review up 441.5% over two years, a finding we cover in our analysis of the code review bottleneck. This post does not repeat that data. It asks a narrower question: if you buy a reviewer to relieve the queue, what are you buying?

We did not run these tools on a codebase. We did not test Greptile, Qodo, Cursor Bugbot or the other names on the benchmark. We took no money from any vendor. Third-party listicles were used to find leads and never as a source for a price.

That last rule removed a lot of material. One comparison site listed CodeRabbit Pro at $15 per user, which the vendor's own page does not show. Aggregator prices drift, and an error on one site gets copied to six more.

AI code review tools pricing: three billing models

The headline numbers are not comparable, because the unit being sold differs. One vendor sells a developer seat. Another sells a seat with a review allowance attached. The third sells nothing flat at all and charges for each review it performs.

Sources: CodeRabbit plans page and pricing page, Graphite pricing page, GitHub Docs. Graphite lists a 20% discount for annual billing, which implies higher monthly prices, but we did not see them and do not state one. We could not verify Copilot Business or Enterprise per seat prices, so none are quoted.

CodeRabbit: seats with an hourly meter

CodeRabbit's documentation lists Essentials, Team, Advanced and Enterprise, plus a free tier that summarises pull requests. Open source projects receive Team features at no charge, and new organisations start on a 14 day Advanced trial.

The limit that matters is the hourly review cap per developer. Essentials allows 5 pull request reviews an hour. Advanced allows 10. A team that pushes many small commits can hit that ceiling, and reviews beyond it fall to usage pricing at $0.25 per reviewed file on GitHub.

Graphite: a flat seat with a platform attached

Graphite's Team plan costs $40 per user per month billed annually and lists unlimited AI reviews and chat. Its October 2025 pricing post called that $5 less than the old Core plus Diamond bundle and the same price as Cursor's Bugbot.

The price buys more than a reviewer. Team also includes merge queue, automations and review customisation, and Graphite is built on stacked pull requests. If you only want a reviewer, you pay for a workflow you may not adopt.

Copilot: metered credits and a second bill

GitHub changed this in 2026. Before 1 June, a review cost a fixed number of premium requests. Under current documentation, each review consumes AI credits, and 1 credit equals $0.01. Reviews that gather context also use GitHub Actions minutes. Self-hosted runners do not consume those minutes.

The billing mechanics deserve their own read, and our map of Copilot's metered billing covers them. For this comparison, the point is simpler. You cannot write down a monthly price for Copilot review. You can only write down a budget.

The chart is arithmetic, not a measurement. We multiplied 2,000 reviews by GitHub's published per review range, and 20 seats by each vendor's seat price. Your pull request sizes will decide where Copilot lands inside the range. I would not sign off on a budget for a metered tool without two weeks of real usage data.

How each reviewer is triggered and where it runs

Price is the second filter. Platform is the first. A reviewer that cannot attach to your repository host is not a candidate at any price.

Graphite reviews every pull request in the repositories you select, and the setup page says no manual configuration is needed. Copilot starts from the opposite default. Its documentation says it reviews a pull request only if you assign it, unless a user, a repository or an organisation ruleset turns on automatic review.

That default shapes your bill. An automatic trigger on a metered tool multiplies cost by every push. GitHub lets an organisation ruleset force review on new pushes and drafts, and an author cannot switch that off. Check the ruleset before you check the invoice.

Copilot has the widest documented reach, because it spans four IDE families and, in preview, Azure DevOps. Graphite is the narrowest, since it is GitHub only. CodeRabbit sits between them, and its pages are vague about Bitbucket and Azure DevOps.

We could not confirm either from the CodeRabbit pages, so a Bitbucket team should ask before a trial. Usage based overage reviews on CodeRabbit are limited to GitHub and GitHub Enterprise.

GitHub's documentation excludes dependency manifests, lockfiles, log files and SVG files from review. That matters for supply chain risk, since a malicious change often arrives in a lockfile. Pair any of these tools with a scanner, and see our comparison of AI code security scanners for that layer.

What each vendor publishes about accuracy

The brief asked us to separate vendor claims from independent evaluations. The vendor side is thin. None of the three publishes a precision and recall figure on a shared dataset that a buyer could rerun.

Graphite's number measures noise. A reviewer that says little will score well on it. A reviewer that says nothing scores perfectly. Noise matters, because developers mute noisy bots, but it is half of the question.

CodeRabbit's September 2026 post tests model configurations on its own cases. It reports that one configuration caught 6 of 13 cases at 41.2% actionable precision and another caught 8 of 13 at 66.7%. That is useful engineering transparency. It says nothing about Copilot or Graphite.

What the independent benchmark shows

Martian, a research lab that says it does not train models or sell coding tools, launched Code Review Bench on 26 February 2026. It is the best independent evidence we found, and it is open source under an MIT licence.

How it measures

There are two tests. The offline test uses 50 pull requests from 5 repositories in Python, Go, TypeScript, Ruby and Java, scored against 173 human curated issues. Three language models act as judges. The online test samples merged GitHub pull requests where review bots commented, then checks whether the developer later fixed what the bot flagged.

What it found

Three findings matter for a buyer. CodeRabbit had the highest online recall at 0.54 and reviewed the most pull requests, 5,035. Graphite had the highest precision and the lowest recall in both tests. No tool found more than 63% of the known issues.

Read those together. The most precise tool misses the most. The most thorough tool still misses nearly half of what developers go on to fix. My view: a human reviewer is still the only recall layer you have, and no vendor page should persuade you otherwise.

Why the figures are directional

Martian states its limits plainly. Its gold set is incomplete, so some comments scored as false positives were real issues. That means every tool's precision is understated and every tool's recall is overstated. Online recall is also a proxy, because nobody knows the full count of bugs in a pull request.

There is a quieter caveat. The offline set builds on datasets released by two vendors, Greptile and Augment. Martian says the top five tools were the same under all three judges, which helps, but the judges have not been calibrated against human annotators.

Why these comparisons go stale within a quarter

Graphite now sits inside Cursor

Fortune reported on 19 December 2025 that Cursor agreed to buy Graphite, with terms undisclosed. Graphite's own pages now route sales contact to Cursor, and Cursor sells a competing reviewer called Bugbot. The Graphite pricing post even used Bugbot as its price comparator.

We cannot tell you what that does to Graphite's roadmap. A buyer should ask whether the standalone product, the GitHub only scope and the $40 price survive integration. Graphite said at announcement it would keep operating as a product, but a plan is not a contract.

GitHub reset Copilot billing mid year

The fixed premium request model gave way to credits and Actions minutes on 1 June 2026. A legacy page still shows a 13 premium request cost per review for annual plan holders who stayed on the old model. Two GitHub pages now describe two different costs for the same action. That is how a stale comparison gets published with a clean conscience.

Do not memorise a price. Memorise the structure: seat, seat plus limit, or meter. Structures last longer than numbers. When you see a new price quoted, ask which of the three it is and what it excludes.

Where this comparison is weakest

Every claim above rests on pages we read, not tools we ran. These are the places where the argument is thinnest.

We could not confirm Copilot Business or Enterprise seat prices, Graphite's monthly prices, or CodeRabbit's support for Bitbucket and Azure DevOps. The fetched pages showed gaps, and we chose to leave them visible. A matrix with a blank cell is more useful than one with a guess.

Martian's live leaderboard renders in the browser, and our fetch could not read it. The figures here come from its February 2026 launch post and repository, not from the current table. Rankings have probably moved since then. Greptile, which this post does not cover, may now lead on some measures.

A fair critic would say precision and recall are the wrong frame. Teams adopt a reviewer for the comments they act on, not for a score. A tool with middling recall that developers read every day beats a thorough one they mute. Our evidence cannot rank tools on that. Only your own pull requests can.

Which team fits which tool

If your pull requests are small and frequent, a seat plan gives you a number to put in a budget. CodeRabbit Team at $48 or Graphite Team at $40 are the realistic candidates, and the hourly cap on CodeRabbit is the thing to test.

Copilot is the lowest friction start, because the seat exists and the trigger is one click. I would cap it with a budget and a ruleset, and review the spend after 30 days. Do not turn on automatic review for every push before you have seen the credit burn.

If you host on GitLab or Azure DevOps, platform coverage decides the shortlist before price does. Regulated teams should also check indemnity and data handling, which our comparison of coding assistant indemnity terms covers. A reviewer reads your whole diff, so it sees your secrets and your logic.

Frequently asked questions

Where to start this week

Run a bake-off on your own history, because it is the only evidence that transfers. Pull 20 merged pull requests from the last quarter, including at least five that caused a defect or a rollback. Write the defect for each down before any tool sees the diff.

Then trial two tools on those 20 diffs and count three things: defects found, comments you would have acted on, and comments you would have muted. Divide the monthly cost by the defects found. If you want a repeatable harness for that count, our guide to building an LLM eval suite shows how to keep the scoring honest. Generated tests are a second check, and the mutation score analysis shows how little a test count proves.

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