GitLab Duo vs ThinkReview: Which AI Code Review Tool is Right for You in 2026?
GitLab Duo vs ThinkReview: Which AI Code Review Tool is Right for You in 2026?
GitLab Duo is a real product: Code Review Flow, Chat, Code Suggestions, and agentic CI. For many teams the blockers are still the same — Premium or Ultimate, an AI gateway or Duo Self-Hosted project, and GitLab Credits on top of the seat.
ThinkReview is for developers who need a second pair of eyes on the merge request today: install the extension, optionally add a self-hosted domain, review in the sidebar.
Platform vs plugin
GitLab Duo runs in GitLab. That is the right architecture for pipeline-native review and IDE completions — and it means you wait on license, version (Duo Agent Platform is documented on recent 18.x self-managed releases), and admin configuration.
ThinkReview runs in the browser (Chrome, Firefox, Edge, Brave) and optionally via MCP in Cursor or Claude Code.
- Reads the MR you already have open — no inbound webhook
- Works on gitlab.com and custom domains
- Pick frontier models or keep code local with Ollama / Enterprise Gateway
Feature showdown (2026)
| Feature | GitLab Duo | ThinkReview |
|---|---|---|
| Setup | License + admin + AI gateway | Extension (minutes) |
| Price | Premium/Ultimate + GitLab Credits (Code Review Flow advertised at 0.25 credits/review) | Free / Lite $9/mo / Pro $14/mo |
| Self-hosted GitLab | Yes, with SKU and version | Custom domain in settings |
| Review UI | Native GitLab + agents | Severity or scoring sidebar |
| Follow-up questions | Duo Chat | Suggested questions + conversational review |
| Custom checklists | Duo flows / policies | Review agents + custom rules |
| Model choice | GitLab-selected / self-hosted models | Claude, GPT, Gemini, Grok, Kimi, and more |
| Local / in-network LLM | Duo Self-Hosted | Ollama + Enterprise Gateway |
| Other platforms | GitLab | GitHub, Azure DevOps, Bitbucket |
ThinkReview in 2026 (what Duo does not replace)
- Severity layout — critical / high / low findings, with suggested questions on the same panel
- Scoring — quality, security, best practices when you want a scorecard
- Generate a comment you post as the reviewer
- Up to ten review agents (for example OWASP-style security) from portal.thinkreview.dev/agents
- Zero code retention on cloud reviews
- Same workflow if you also review GitHub or Azure DevOps PRs
Plans: Free — 5 reviews/day, standard models, ~1500 LOC. Lite $9/mo — custom GitLab domains, faster reviews, Lite flagship models. Professional $14/mo — larger diffs, premium models. Annual billing is cheaper; see pricing.
When to buy Duo vs install ThinkReview
Buy GitLab Duo if you already pay for Premium or Ultimate, need AI inside VS Code/JetBrains and CI, and can run Duo Self-Hosted or the GitLab AI gateway.
Install ThinkReview if you want severity findings and follow-up chat on the MR this afternoon, you are on Community Edition or a locked-down custom domain, you review large diffs, or you work across GitLab and other git hosts.
They are not mutually exclusive. Duo (or SonarQube) can own automation; ThinkReview owns the interactive pass.
Install ThinkReview for Chrome · Firefox · Edge
Related: Self-hosted GitLab comparison · Best AI tools for GitLab
Updated August 2026. ThinkReview Cloud v2.2.1 / extension v2.3.9.