GitLab Duo vs Spacelift
GitLab Duo and Spacelift are both popular tools in the DevOps & Infrastructure space. Both use a paid pricing model, with GitLab Duo starting at $19/mo and Spacelift at $40/mo. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose GitLab Duo if you want ai-powered devsecops built into the gitlab platform.. GitLab Duo's biggest strengths include ai integrated across the entire devsecops lifecycle and single platform eliminates tool sprawl. Choose Spacelift if you prefer infrastructure as code management with ai-powered policy enforcement.. Key advantages include best multi-iac platform supporting all major tools and policy enforcement prevents dangerous infrastructure changes. It's also rated higher (4.2 vs 3.9).
AI-powered DevSecOps built into the GitLab platform.
Infrastructure as code management with AI-powered policy enforcement.
| GitLab Duo | Spacelift | |
|---|---|---|
| Pricing | $19/mo | $40/mo |
| Free Tier | No | No |
| Pricing Model | Paid | Paid |
| Rating | ★ 3.9 | ★ 4.2 |
| Categories | Code Generation, DevOps & Infrastructure | DevOps & Infrastructure |
| Key Features | 6 features | 6 features |
| Feature | GitLab Duo | Spacelift |
|---|---|---|
| AI code suggestions in the GitLab Web IDE | ✓ | — |
| Merge request summaries and review assistance | ✓ | — |
| AI-powered vulnerability explanation and resolution | ✓ | — |
| CI/CD pipeline generation from natural language | ✓ | — |
| Code explanation and documentation generation | ✓ | — |
| Root cause analysis for failed pipelines | ✓ | — |
| Multi-IaC support (Terraform, Pulumi, CloudFormation, Ansible) | — | ✓ |
| Automated drift detection and remediation | — | ✓ |
| Policy-as-code with Open Policy Agent | — | ✓ |
| AI-assisted infrastructure change analysis | — | ✓ |
| Approval workflows and plan previews | — | ✓ |
| Self-hosted and SaaS deployment options | — | ✓ |
GitLab Duo
Pros
- + AI integrated across the entire DevSecOps lifecycle
- + Single platform eliminates tool sprawl
- + Strong security features with vulnerability resolution
- + Natural language CI/CD pipeline generation
Cons
- − Requires GitLab Premium or Ultimate subscription
- − AI features less capable than dedicated tools like Copilot
- − Lock-in to the GitLab ecosystem
Spacelift
Pros
- + Best multi-IaC platform supporting all major tools
- + Policy enforcement prevents dangerous infrastructure changes
- + Drift detection catches unauthorized manual changes
- + Strong enterprise features with self-hosted option
Cons
- − Premium pricing aimed at enterprise teams
- − Steeper learning curve than simpler CI/CD tools
- − No free tier for evaluation
The Bottom Line
Choose GitLab Duo if: you want ai-powered devsecops built into the gitlab platform.. Keep in mind: requires gitlab premium or ultimate subscription.
Choose Spacelift if: you prefer infrastructure as code management with ai-powered policy enforcement.. It holds a higher user rating (4.2 vs 3.9). Keep in mind: premium pricing aimed at enterprise teams.
Both tools compete in the DevOps & Infrastructure space. The right choice depends on your specific needs, team size, and budget.
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