Compared with hosted reviewers
Each cell is what the vendor's own documentation or pricing page said on the date below. If something is out of date, open an issue and it gets fixed.
Checked on .
| Mergerie | CodeRabbit | GitHub Copilot code review | GitLab Duo Code Review | |
|---|---|---|---|---|
| Where the review runs | On your machine | Vendor cloud (self-hosted on enterprise plans) | GitHub cloud | GitLab cloud or self-managed with GitLab's AI gateway |
| Does your code leave your machine for the review? | Only to the model behind your own Claude / Copilot subscription, exactly as when you use their CLI | Yes, to the vendor | Yes, to GitHub | Yes, to GitLab / its model provider |
| Forges | GitLab and GitHub, side by side, repository by repository | GitHub, GitLab, Bitbucket, Azure DevOps | GitHub only | GitLab only |
| Cost | None on top of the Claude Code or Copilot plan you already have | Per seat, monthly | Included in paid Copilot plans, with premium-request limits | Per seat, as a GitLab Duo add-on |
| API key or token to buy | No: it drives the vendor CLI | Vendor account | Copilot plan | Duo add-on |
| Scored report with findings at file:line | Yes, versioned, with incremental re-review | Yes | Yes (comments) | Yes (comments) |
| Convergence loop: review → AI fix → re-review until a threshold | Yes | No (suggestions, one-click fixes) | No | No |
| Objective verification (your own test commands, verdict on the MR) | Yes, including several MRs verified as one set | No (relies on CI) | No (relies on Actions) | No (relies on CI) |
| Coding sessions from a ticket, multi-repository | Yes (Jira ticket → branch, prompt, commit, MR) | No | Copilot coding agent (GitHub issues) | Duo agent features, plan-dependent |
| Review rules that fire on a path and badge the MR | Yes | Path instructions in config | Custom instructions in repo | Custom instructions |
| Publishes the report on the MR | On demand, or automatically if you tick the box | Automatically | Automatically | Automatically |
| Multi-user / team | Single-user (see teams) | Yes | Yes | Yes |
| License | AGPL-3.0, open source | Proprietary | Proprietary | Proprietary |
Sources
The honest summary: if your code may live on a vendor's servers and your team is on GitHub, the hosted tools are excellent and need no install. If it may not, or if you are on GitLab, or if you already pay for Claude Code or Copilot and refuse a second bill, that is where Mergerie starts.