Greptile's core idea is that most AI PR reviewers only look at the diff, missing how a change interacts with the rest of a codebase. It builds a graph of a repository's files, functions, and dependencies first, then reviews each pull request against that full context, generating in-line comments on bugs, anti-patterns, performance, security, and compliance issues along with suggested fixes and a plain-language PR summary.
Its TREX feature goes further than commenting: it writes and runs tests in a sandbox to actually verify a change rather than only inferring risk from reading code. The company claims teams using it merge PRs significantly faster, up to 80%, while catching roughly three times more issues than a typical human-only review, figures that come from Greptile itself rather than independent benchmarking.
It supports custom style guides and compliance rules, can be self-hosted or used through API, Slack, GitHub, GitLab, or Zapier, and covers more than 30 languages. Pricing is freemium with a Pro tier at $30 per seat per month including 50 review credits, alongside free access for open-source projects and early-stage startups.