Kestra vs StackStorm
A side-by-side comparison of two self-hosted automation & workflows options — licensing, setup difficulty, resource needs, and what each one replaces.
Kestra
Declarative orchestration and scheduling platform
VS
StackStorm
Event-driven automation, often called IFTTT for ops
| Feature | Kestra | StackStorm |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 97 · Excellent | 86 · Excellent |
| Category | Automation & Workflows | Automation & Workflows |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | Python |
| Setup difficulty | Hard | Hard |
| Min. RAM | 1,024 MB | 2,048 MB |
| Deployment | docker, kubernetes | docker, kubernetes, bare-metal |
| GitHub stars | ★ 28,316 | ★ 6,539 |
| First released | 2021 | 2014 |
| Replaces | Zapier, Make | Zapier, AWS Systems Manager |
What are Kestra and StackStorm?
Kestra
Kestra is an event-driven orchestration platform for building and scheduling data and automation workflows declared in YAML. It targets data engineers and platform teams. It is deployed via Docker.
- Declarative YAML workflows
- Event-driven and scheduled runs
- Rich plugin ecosystem
- Built-in UI and API
StackStorm
StackStorm is an event-driven automation platform that connects triggers to actions through rules and workflows. It is commonly used for auto-remediation, security responses and continuous deployment.
- Event-driven rules and triggers
- Large pack ecosystem for integrations
- Workflow engine for complex automation
- ChatOps integration
Kestra vs StackStorm: key differences
Kestra is written in Java, while StackStorm is built with Python. Kestra is the lighter option, starting around 1,024 MB of RAM against 2,048 MB for StackStorm. StackStorm is the more established project (first released 2014), while Kestra arrived in 2021. Kestra has the considerably larger community, at 28,316 GitHub stars versus 6,539.
Why pick each one
Choose Kestra if…
- Strong for data orchestration
- Scalable architecture
- Open-source license
Watch out for
- Steeper learning curve
- Heavier resource needs
Choose StackStorm if…
- Powerful for ops automation
- Extensive integration packs
Watch out for
- Heavy multi-component install
Frequently asked questions
Is Kestra or StackStorm better?
Neither is universally better. Kestra has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Kestra and StackStorm free and open-source?
Yes. Kestra is licensed under Apache-2.0 and StackStorm under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Kestra and StackStorm with Docker?
Kestra: yes. StackStorm: yes.
Which is lighter on resources, Kestra or StackStorm?
Kestra has the smaller minimum footprint at 1,024 MB of RAM, compared to about 2,048 MB for StackStorm. Real-world usage depends on library size, user count, and enabled features.