June 4, 20269 min readAI Dev Review

AI code review tools, compared

Six AI PR reviewers ran across the same 40 pull requests. Only two we'd keep.

Code ReviewReviewsBenchmarks

Automated PR review is the least glamorous AI use case and the one most likely to save a team from a bad merge. We ran six of them across a month of real PRs.

How they scored

Signal-to-noise: which caught real issues without drowning us in style nits.
False positives: how often we had to argue with the bot.
Setup friction: how long from install to first useful comment.

The keepers

Two tools produced comments our senior reviewers agreed with more than 70% of the time. The other four averaged under 40% — worse than useless because they cost review time.

Verdict

AI review is real, but the median tool is not ready. Pilot before you buy, and measure signal-to-noise on your actual PRs, not the vendor's demo repo.

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