$ git diff main -- platform/gitlab.md
15 of the 19 tracked tools support GitLab merge requests natively. Notable absences: Graphite Reviewer, GitHub Copilot Code Review, Cursor BugBot, Claude Code Review (GitHub-only at launchsrc). GitLab Duo Code Review is bundled with GitLab Ultimate and not tracked here as a third-party tool.
1+CodeRabbit, Qodo, DeepSource, SonarQube, Snyk Code - support both self-managed and gitlab.com
2+Greptile, Codacy, Sourcery - gitlab.com first; self-managed varies by edition
3-Verify before committing: self-managed GitLab adds API token configuration that pure-SaaS vendors handle with OAuth
1Bundled in GitLab Duo Pro / Enterprise add-ons (an Ultimate-tier conversationsrc). Decent for GitLab-only shops who already pay Ultimate. Third-party tools beat it on multi-platform fit and on review depth.
1-Several vendors' "Checks" experience is shallower on GitLab Pipelines than GitHub Checks API
2-Suggested-edits (apply patch from comment) lag GitHub on most third-party tools