head to head · open source
workflow-core vs Juggle
workflow-core has 5,926 GitHub stars, 1,262 forks, 133 open issues and last shipped 4 days ago. Juggle has 1,148 stars, 200 forks, 7 open issues and last shipped 6 days ago. workflow-core leads on adoption by 416% (5,926 vs 1,148 stars). workflow-core is written in C# under MIT; Juggle is written in Java under GPL-3.0. workflow-core has attracted 21% as many forks as stars, Juggle 17%. workflow-core was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (workflow-engine), so they are genuine substitutes rather than adjacent tools.
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
| workflow-core | Juggle | |
|---|---|---|
| GitHub stars | ★ 5.9K | ★ 1.1K |
| License | MIT | GPL-3.0 |
| Written in | C# | Java |
| Last push | 2026-09-16 | 2026-09-14 |
| Forks | ⑂ 1.3K | ⑂ 200 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick workflow-core if
- You weight community size — 5.9K stars and counting
- You want the MIT license terms
- Your stack matches C#
- You value the larger contributor base for long-term maintenance
pick Juggle if
- You want the Juggle feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Java
- You evaluated both and Juggle fits your workflow better
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 →
About Juggle
Juggle is a low code, zero code and AI assisted microservice API orchestration and system integration platform for Java teams that need to compose existing HTTP, Dubbo and WebService APIs into new endpoints without writing a new service.
read the full Juggle overview →
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Frequently asked questions
Is workflow-core or Juggle more popular?
workflow-core has 5,926 GitHub stars and Juggle has 1,148. workflow-core has the larger community by that measure.
Are workflow-core and Juggle free?
Both are open source. workflow-core is licensed under MIT and Juggle under GPL-3.0. Neither carries a licence fee.
What is the difference between workflow-core and Juggle?
workflow-core is written in C# and Juggle in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, workflow-core or Juggle?
Choose workflow-core if you want the larger community (5,926 stars) or its MIT licence terms. Choose Juggle if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.