head to head · open source
conductor vs viewflow
conductor has 32,207 GitHub stars, 1,010 forks, 253 open issues and last shipped yesterday. viewflow has 2,874 stars, 413 forks, 19 open issues and last shipped 5 days ago. conductor leads on adoption by 1,021% (32,207 vs 2,874 stars). conductor is written in Java under Apache-2.0; viewflow is written in Python under AGPL-3.0. conductor has attracted 3% as many forks as stars, viewflow 14%. conductor 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
| conductor | viewflow | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 2.9K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Java | Python |
| Last push | 2026-09-17 | 2026-09-13 |
| Forks | ⑂ 1.0K | ⑂ 413 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick conductor if
- You weight community size — 32K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick viewflow if
- You want the viewflow feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and viewflow fits your workflow better
About conductor
Conductor is an Apache 2.0 licensed, event driven agentic workflow engine written in Java that provides durable and highly resilient execution for applications and AI agents, aimed at teams running microservices, AI agents, and adaptive workflow graphs that need orchestration they can version, inspect, and recover.
read the full conductor overview →
About viewflow
Viewflow is reusable workflow library for Django. It lives in Python and Django ecosystem, category Infrastructure & Operations / Orchestration & Scheduling. It targets low code business application building. It gives ready made components for user management, workflows, and reporting. It ships as one package. Each part works on its own, but parts also work together. Project homepage is viewflow.io. Concrete problem: business applications need process state, form handling, reporting, and integration with existing systems. Custom Django code often repeats this plumbing. Viewflow provides base classes, BPMN process…
read the full viewflow overview →
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Frequently asked questions
Is conductor or viewflow more popular?
conductor has 32,207 GitHub stars and viewflow has 2,874. conductor has the larger community by that measure.
Are conductor and viewflow free?
Both are open source. conductor is licensed under Apache-2.0 and viewflow under AGPL-3.0. Neither carries a licence fee.
What is the difference between conductor and viewflow?
conductor is written in Java and viewflow in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, conductor or viewflow?
Choose conductor if you want the larger community (32,207 stars) or its Apache-2.0 licence terms. Choose viewflow if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.