| Feature | Semaphore UI | Spacelift |
|---|---|---|
| Has FOSS version | ✅ YES | ❌ NO |
| Ease of setup and maintenance | ✅ YES | 🤷 |
| Efficient use of CPU and RAM | ✅ YES, written in pure Go | 🤷 |
| Can operate without Kubernetes, Docker, Java, etc | ✅ YES, single binary file | 🤷 |
| Can run Terraform/OpenTofu code | ✅ YES | ✅ YES |
| Can run Bash scripts | ✅ YES | ✅ YES |
| Support remote runners | ✅ YES | 🤷 |
| SaaS | ✅ YES | ✅ YES |
| Fully on-premises | ✅ YES | ❌ NO |
While Spacelift is a powerful tool for managing infrastructure as code with a strong focus on policy management and compliance, Semaphore UI provides a more comprehensive and user-friendly solution for broader CI/CD workflows. Its ease of use, broad integrations, high performance, robust security features, and excellent support make it a versatile and attractive choice for teams looking to implement efficient and scalable CI/CD pipelines.