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We analyzed 40M PRs: Copilot overtook CodeRabbit as top AI reviewer
- zak-mandhro 10mo agoAuthor here. Everyone's focused on AI writing code. But the shift to AI reviewing code moved faster - 1 in 7 active PRs now have an AI reviewer, up from 1 in 100 eighteen months ago. A few things that surprised us: - Copilot overtook CodeRabbit in November despite CodeRabbit being purpose-built for review - native GitHub integration matters more than we expected - Gemini went from near-zero to #3 in 10 months (43X growth). Google isn't marketing this aggressively yet - AI agents authored 99K PRs but participated in 5.9M -automation is still heavily weighted toward review, not generation - Some early entrants like Korbit have already shut down Data is GitHub Archive + our anonymized corpus. Happy to answer questions on classification or edge cases.
- amnaanwar 10mo agoI met the Korbit founder and team at AI Dev World last year - smart, thoughtful group. The founder was deeply enthusiastic about their approach to PR analysis. They had a very academic, research-driven team behind the product, which showed in how rigorously they were approaching the problem. It was exciting work, and a good reminder of how much serious experimentation has been happening in AI code review over the past couple of years, even among teams that didn’t ultimately make it.
- zak-mandhro 10mo agoYeah, with so much investment from the giants in this space, it's tough for startups to carve out a niche. Having said that, CodeRabbit has remained a strong contender against the platforms throughout 2025.