What CodeRabbit is
CodeRabbit is an AI code reviewer built around the pull request. It posts line-by-line comments on changes, you can talk back to it in the thread, and it also runs in the IDE across VS Code, Cursor and Windsurf, and from a CLI.
It integrates with GitHub, GitLab, Azure DevOps and Bitbucket. That is broader platform coverage than Nexdge has, and if your team is on GitLab or Bitbucket it is the difference between a tool you can adopt and one you cannot. Nexdge's only Git integration today is the GitHub App.
Reviewing at the pull request is a defensible place to stand. It is where a team already discusses code, and a comment in a thread lands in an existing habit rather than asking for a new one.
What Nexdge is
Nexdge starts before the pull request exists. Paste a function into the browser with no account connection, no OAuth grant and no repository, and five specialists review it in parallel: Security, Reliability, Business Logic, Performance and Quality, with Security and Reliability weighted more heavily in the final score.
Every finding is rewritten, and the rewrite is scanned again before it reaches you, so what you are shown has already passed. Nexdge also returns an AI origin probability on the submitted code, and can validate that code against a saved description of the business rules it is supposed to implement.
Code is processed in an ephemeral environment and destroyed at the end of the review. Nothing is written to disk, nothing is retained.