head to head · open source
rancher vs workflow-core
rancher has 25,922 GitHub stars, 3,222 forks, 3,371 open issues and last shipped yesterday. workflow-core has 5,926 stars, 1,262 forks, 133 open issues and last shipped 2 days ago. rancher leads on adoption by 337% (25,922 vs 5,926 stars). rancher is written in Go under Apache-2.0; workflow-core is written in C# under MIT. rancher has attracted 12% as many forks as stars, workflow-core 21%. rancher was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| rancher | workflow-core | |
|---|---|---|
| GitHub stars | ★ 26K | ★ 5.9K |
| License | Apache-2.0 | MIT |
| Written in | Go | C# |
| Last push | 2026-09-17 | 2026-09-16 |
| Forks | ⑂ 3.2K | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick rancher if
- You weight community size — 26K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick workflow-core if
- You want the workflow-core feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and workflow-core fits your workflow better
About rancher
Rancher is an Apache 2.0 licensed, Go based open source container management platform for organizations that deploy containers in production and need to run Kubernetes everywhere while meeting IT requirements and empowering DevOps teams.
read the full rancher overview →
About workflow-core
Workflow Core is a lightweight, embeddable workflow engine targeting .NET Standard, written in C and released under the MIT license. It lives in the .NET ecosystem, distributed as NuGet packages, and is built around the idea of long running processes that contain multiple tasks and must track their state between steps. Rather than running as a separate server, it is a library that is hosted inside an application, and it exposes a fluent C API for defining workflows. Workflows are expressed as a starting step followed by chained steps, and the same class can declare inputs and outputs that move data from one step …
read the full workflow-core overview →
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Frequently asked questions
Is rancher or workflow-core more popular?
rancher has 25,922 GitHub stars and workflow-core has 5,926. rancher has the larger community by that measure.
Are rancher and workflow-core free?
Both are open source. rancher is licensed under Apache-2.0 and workflow-core under MIT. Neither carries a licence fee.
What is the difference between rancher and workflow-core?
rancher is written in Go and workflow-core in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, rancher or workflow-core?
Choose rancher if you want the larger community (25,922 stars) or its Apache-2.0 licence terms. Choose workflow-core if its feature set, stack or MIT licence fits better. Both are self-hostable.