Last updated: May 2026
GitLab Duo is the AI layer built into the GitLab DevSecOps platform. It provides code suggestions, AI chat, vulnerability detection, test generation, root cause analysis, and agentic coding — all within the GitLab UI and supported IDEs. It is not a standalone tool; it requires an active GitLab subscription.
GitLab Duo is an add-on on top of a GitLab subscription:
| GitLab tier | Base price | Duo add-on | Effective minimum |
|---|---|---|---|
| GitLab Free | $0 | Not available | — |
| GitLab Premium | $29/user/month | Duo Pro: +$19/user/month | $48/user/month |
| GitLab Ultimate | $99/user/month | Duo Enterprise: custom | $99+ |
Basic AI is included in Premium and Ultimate at no extra charge — code suggestions and chat in the IDE ship with your existing GitLab plan. Duo Pro ($19/user/month add-on) unlocks the full feature set. Duo Enterprise (Ultimate only, custom pricing) adds the most advanced AI including root cause analysis and vulnerability resolution.
Duo Pro ($19/user/month, available on Premium and Ultimate) adds: advanced code generation, test generation, code refactoring, AI chat with broader context, and organizational usage controls.
Duo Enterprise (Ultimate only, custom pricing) adds: root cause analysis for pipeline failures, AI-suggested vulnerability fixes, issue thread summarization, and the Duo Agent Platform for agentic workflows.
The Duo Agent Platform enables autonomous AI workflows within GitLab. Agents can implement Jira-style issues, run code reviews against organizational standards, and execute multi-step development tasks. It is priced at $1/credit for agentic usage on top of your existing Duo plan. This sits alongside cloud agents from GitHub Copilot and Kilo Code but is native to the GitLab workflow.
VS Code and all JetBrains IDEs. It also works natively in the GitLab web UI — meaning you can use AI assistance directly in GitLab's built-in editor, merge request interface, and CI/CD pipeline view without opening a local IDE.
The comparison depends on whether you use GitLab or GitHub as your primary platform. For GitLab-native teams, Duo's integration is seamless and deeply contextual — it understands your GitLab issues, MRs, and CI/CD pipelines in ways Copilot cannot.
For general coding quality, GitHub Copilot's autocomplete is faster and more accurate. Copilot Pro at $10/month is significantly cheaper than Duo Pro at $19/user (plus the GitLab Premium base cost). Copilot also supports more IDEs.
The decision is almost always: use whichever AI tool matches the platform your team already lives in.
No. GitLab is explicit that GitLab Duo does not use customer code to train AI models. This applies across all paid tiers. GitLab also offers self-managed deployment where model processing stays within your infrastructure — a meaningful option for regulated industries that cannot use SaaS AI.
Teams already on GitLab Premium or Ultimate who want AI assistance without introducing another vendor. The effective cost of Duo Pro is $48/user/month (GitLab Premium + Duo Pro add-on) — more than Cursor Pro ($20) or Copilot Business ($19) as standalone tools, but those standalone tools do not include GitLab's project management, CI/CD, and security scanning. If you are evaluating an all-in-one platform, the combined cost of GitLab + Duo can be competitive with a stack of separate tools. See Best Cursor Alternatives for a full comparison of the AI coding tool landscape.