Semaphore
Spacelift
| Feature | Semaphore | Spacelift |
|---|---|---|
| Pricing | Free / from $10/mo | Free / from $35/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.4 / 5 |
| Best For | development-teams, open-source-projects, startups, monorepo-users | platform-teams, devops-engineers, infrastructure-teams, enterprises |
| Founded | 2012 | 2020 |
| Parallel Pipelines | ✓ | ✗ |
| Test Reports | ✓ | ✗ |
| Secrets Management | ✓ | ✗ |
| Docker Support | ✓ | ✗ |
| Caching | ✓ | ✗ |
| Notifications | ✓ | ✗ |
| Iac Orchestration | ✗ | ✓ |
| Policy Engine | ✗ | ✓ |
| Drift Detection | ✗ | ✓ |
| Modules Registry | ✗ | ✓ |
| Vcs Integration | ✗ | ✓ |
| Approval Workflows | ✗ | ✓ |
✓ Semaphore Pros
- Extremely fast build times
- Generous free tier for open source
- Easy YAML-based configuration
- Built-in secrets management
✗ Semaphore Cons
- Smaller community than GitHub Actions
- Limited marketplace for pre-built steps
- Debugging failed builds can be tricky
✓ Spacelift Pros
- Multi-IaC support
- Excellent policy engine
- Good drift detection
- Strong collaboration tools
✗ Spacelift Cons
- Premium pricing
- Newer platform less proven
- Learning curve for policies
The Verdict
Semaphore is built for development teams and open source projects, with a focus on parallel-pipelines and test-reports. Spacelift targets platform teams and devops engineers and leads with iac-orchestration and policy-engine.
On pricing, Semaphore is the clear winner for budget-conscious users — starting at $10/mo compared to $35/mo for Spacelift. That $25/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.