Kestra
Semaphore
| Feature | Kestra | Semaphore |
|---|---|---|
| Pricing | Free / from $100/mo | Free / from $10/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.4 / 5 | 4.3 / 5 |
| Best For | data-engineers, devops-teams, backend-developers, workflow-automation | development-teams, open-source-projects, startups, monorepo-users |
| Founded | 2020 | 2012 |
| Workflow Orchestration | ✓ | ✗ |
| Scheduling | ✓ | ✗ |
| Event Triggers | ✓ | ✗ |
| Plugins | ✓ | ✗ |
| Monitoring | ✓ | ✗ |
| Secret Management | ✓ | ✗ |
| Multi Tenant | ✓ | ✗ |
| Parallel Pipelines | ✗ | ✓ |
| Test Reports | ✗ | ✓ |
| Secrets Management | ✗ | ✓ |
| Docker Support | ✗ | ✓ |
| Caching | ✗ | ✓ |
| Notifications | ✗ | ✓ |
✓ Kestra Pros
- Open-source with full orchestration capabilities
- Declarative YAML workflows (GitOps friendly)
- 500+ plugins for data, cloud, and messaging services
- Real-time triggers, schedules, and event listeners
✗ Kestra Cons
- Less visual builder than no-code tools
- Learning curve for YAML workflow syntax
- Newer platform with smaller community than Airflow
✓ 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
The Verdict
Kestra is built for data engineers and devops teams, with a focus on workflow-orchestration and scheduling. Semaphore targets development teams and open source projects and leads with parallel-pipelines and test-reports.
On pricing, Semaphore is the clear winner for budget-conscious users — starting at $10/mo compared to $100/mo for Kestra. That $90/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.
Feature-wise, Kestra offers broader built-in capabilities (7 features vs 6), while Semaphore takes a more focused approach — which can mean a simpler, faster onboarding experience.
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.