head to head · open source
conductor vs bree
conductor has 32,207 GitHub stars, 1,010 forks, 253 open issues and last shipped yesterday. bree has 3,293 stars, 87 forks, 29 open issues and last shipped 7 months ago. conductor leads on adoption by 878% (32,207 vs 3,293 stars). conductor is written in Java under Apache-2.0; bree is written in JavaScript under MIT. conductor has attracted 3% as many forks as stars, bree 3%. conductor 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
| conductor | bree | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 3.3K |
| License | Apache-2.0 | MIT |
| Written in | Java | JavaScript |
| Last push | 2026-09-17 | 2026-02-17 |
| Forks | ⑂ 1.0K | ⑂ 87 |
| 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 bree if
- You want the bree feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and bree 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 bree
Bree is Node.js and JavaScript job task scheduler. It runs scheduled work inside Node.js apps. It uses worker threads to spawn sandboxed processes. It supports cron, Date, ms, later, and human friendly syntax. It lives in Node.js scheduling ecosystem.
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Frequently asked questions
Is conductor or bree more popular?
conductor has 32,207 GitHub stars and bree has 3,293. conductor has the larger community by that measure.
Are conductor and bree free?
Both are open source. conductor is licensed under Apache-2.0 and bree under MIT. Neither carries a licence fee.
What is the difference between conductor and bree?
conductor is written in Java and bree in JavaScript. 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 bree?
Choose conductor if you want the larger community (32,207 stars) or its Apache-2.0 licence terms. Choose bree if its feature set, stack or MIT licence fits better. Both are self-hostable.