Greptile

Greptile indexes your repository so it understands how files, functions and services relate to each other. When a pull request comes in, it reviews the change against that wider picture, which helps it catch bugs that only show up when you know what else calls the code. Comments appear directly in GitHub or GitLab, and you can ask follow-up questions about the codebase through its API or chat. Teams can feed it their own coding rules and past review comments so it matches their standards. Greptile is paid, priced per developer, and offers a trial. It fits larger or older codebases where a reviewer that only sees the diff would miss too much.