Argo Workflows vs StackStorm (2026): which should you pick?
As of Nov 13, 2026, Argo Workflows and StackStorm share a 2.4 GPA, both are free, so the choice depends on which platforms you need.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
They get the same grade on all five counts.
Price, platforms and features side by side. The table says where each price was read and when.
Argo Workflows
Open-source container-native workflow engine for Kubernetes
StackStorm
Open-source event-driven automation for DevOps and SRE teams
Which one is for you
Pick Argo Workflows if
- Fits if you already run Kubernetes and want container pipelines
- Works for platform teams who write workflows as code in YAML or Python
Look elsewhere if
- Skip it if you don't run Kubernetes, because it needs a cluster
- Not for you if you want vendor support, as help comes from the community
- Too light on hand-holding for non-engineers, since workflows are written as Kubernetes resources
- Watch out: the docs page would not load for us, so this card rests on the listing
Pick StackStorm if
- Fits if your IT team wants rules that react to events and run fixes automatically
- Works for engineers comfortable writing Python sensors and actions
Look elsewhere if
- Skip it if you don't want to host software, since no hosted service is listed
- Not for you if you need vendor support, as help comes from community Slack, forums and GitHub
- Too light on hand-holding for non-technical teams: custom pieces are Python plugins or scripts
- Watch out: install docs cover Ubuntu and RHEL-compatible Linux, Docker and Kubernetes, not Windows or Mac
How we grade them
| 2.4GPAArgo WorkflowsFair | 2.4GPAStackStormFair | |
|---|---|---|
| Value for money | C$0 for the software, but you run it on your own Kubernetes cluster, which isn't free. That puts it in the middle. | C$0 for open-source software, but you run it on your own machines. That puts it in the middle. |
| Free plan and trial | BOpen source with no paid tier, so you pay only for the cluster. | BNo paid plan; it costs only the servers you host it on. |
| Features | BSteps, DAGs, templates, cron workflows, artifacts, retries, loops and access control. The core job is covered. | BSensors, rules, workflows, packs, an audit trail, ChatOps and an API. The core job is covered. |
| Ease of use | DNo store rating on record. It needs a Kubernetes cluster and YAML definitions. | DNo store rating on record. You install it on Linux, Docker or Kubernetes and write Python. |
| Platforms and integrations | BA web UI, with a Python SDK through Hera and 6 integrations. It runs on Kubernetes. | BWeb UI and Linux, with 7 integrations and an API. |
| Best for | running container jobs as workflows on Kubernetes | event-driven automation for IT operations |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Argo Workflows and StackStorm. How we grade
Price against what you get
Argo Workflows has no paid plan and scores 2.3 out of 4 on features, ease of use and platforms. StackStorm has no paid plan and scores 2.3.
On this chart the two sit in the same place: the same score for the same starting price. Of the other automation tools on the chart, none scores higher than Argo Workflows for less, and none scores higher than StackStorm for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Argo Workflows also covers job scheduling.
At a glance
| Argo Workflows | StackStorm | |
|---|---|---|
| Pricing | Free | Free |
| Starts at | Free | Free |
| Free plan | None | None |
| Free trial | None listed | None listed |
| Web | ||
| Linux | ||
| Made by | Argo Project Authors | StackStorm, a Series of LF Projects, LLC |
| Price read from | argo-workflows.readthedocs.io | stackstorm.com |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
Argo Workflows
- It needs a Kubernetes cluster; the project describes itself as a Kubernetes-native engine, not a hosted service.
- The project pages list no paid plan or vendor support; help comes from the community.
- Workflows are written as Kubernetes resource definitions, which assumes comfort with containers and YAML.
StackStorm
- It is self-hosted: the install docs cover Ubuntu and RHEL-compatible Linux, Docker and Kubernetes, and no hosted service is listed.
- The project lists no paid plan or vendor support; help comes from the community Slack, forums and GitHub.
- Custom sensors and actions are written as Python plugins or scripts, so it suits technical teams.
Key features
Argo Workflows
- Container-per-step workflows
- Every step in a workflow is a container, and the engine runs them as Kubernetes pods on any cluster.
- Steps and DAGs
- Multi-step workflows can be written as an ordered sequence of tasks or as a directed acyclic graph that captures dependencies between tasks.
- Templates and cron workflows
- The docs list workflow templates, cluster workflow templates and cron workflows as custom resource kinds for reusing and scheduling work.
- Artifacts, retries and loops
- The user guide covers artifacts, parameters, loops, conditionals, retries, timeouts, exit handlers and suspending a running workflow.
- Access control
- Documentation covers service accounts and role-based access control for workflows.
- Python SDK through Hera
- The project points Python users to the Hera Python SDK for defining Argo workflows.
StackStorm
- Sensors and triggers
- Sensors are Python plugins that watch for events in outside systems and emit triggers, such as timers, webhooks or a monitoring alert.
- Rules
- Rules map triggers to actions or workflows, with matching criteria and a mapping from the trigger payload to the action's inputs.
- Actions and workflows
- Actions are outbound integrations such as SSH or REST calls, and workflows string several actions together with order, conditions and data passing.
- Packs and Exchange
- Packs group integrations and automations for sharing, and many are published on StackStorm Exchange.
- Audit trail
- Manual and automated action executions are recorded with their triggering context and results, and audit logs can feed tools such as Splunk and syslog.
- ChatOps, web UI and API
- The docs describe ChatOps support, a web UI, a CLI client, a REST API and Python client bindings.
Plans
Argo Workflows
Open source$0
Free software you install and run on your own Kubernetes cluster. The project pages list no paid plans.
StackStorm
Open source$0
Free software you install and run yourself. The project's pages list no paid plans.
Common questions
Which is cheaper, Argo Workflows or StackStorm?
As of Nov 13, 2026, both Argo Workflows and StackStorm are free to use.
Which has a free plan, Argo Workflows or StackStorm?
As of Nov 13, 2026, both Argo Workflows and StackStorm have a free plan.
Which platforms do Argo Workflows and StackStorm run on?
As of Nov 13, 2026, only StackStorm lists a Linux app. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.