GitLab Duo, Joute's Review

The essentials in 20 seconds

GitLab AI suite covering code completion, code review, tests, security and CI/CD
Available as VS Code and JetBrains extension, integrated into GitLab Web IDE
AI chat (GitLab Duo Chat) for contextual questions about code
Price: $19/month per user (Duo Pro)

Verdict: GitLab Duo is coherent and well integrated for teams already on GitLab. The depth of integration with the CI/CD pipeline and security is a real advantage over GitHub Copilot.

What is GitLab Duo

GitLab Duo is the suite of AI features integrated into GitLab. It covers the entire DevSecOps cycle: code assistance, code explanation, test generation, security fix suggestions, MR (Merge Request) summaries, and CI/CD pipeline optimization.

GitLab positions Duo as complete SDLC coverage, not just autocompletion.

Strengths

Deep integration into the CI/CD pipeline

GitLab Duo can suggest pipeline optimizations, explain CI errors, and even automatically resolve certain configuration issues. This is unique compared to GitHub Copilot.

AI code review on Merge Requests

Duo Code Review generates AI review comments on MRs, similar to CodeRabbit but native in GitLab.

Configurable data privacy

For sensitive organizations, GitLab Duo can be configured to avoid sending code data outside GitLab's infrastructure.

Limits

Less known than GitHub Copilot

The ecosystem of resources, tutorials and community around GitLab Duo is less developed than GitHub Copilot.

Autocompletion quality below Cursor

For the pure code assistance experience, Cursor remains superior in terms of understood context and relevance of suggestions.

Pricing

GitLab Premium: $24/month (Duo not included)
Duo Pro: +$19/month per user
Duo Enterprise: quote-based pricing

Alternatives

GitHub Copilot for Microsoft's code assistant with a wider ecosystem
CodeRabbit for AI code review usable on GitLab too
Cursor for the best AI IDE experience across all platforms

Verdict

GitLab Duo is the go-to for enterprise teams already on GitLab who want a unified AI solution in their tool. For startups on GitHub, the migration isn't justified just for Duo.