head to head · open source
Vector vs openmessaging-java
Vector has 22,793 GitHub stars, 2,371 forks, 2,512 open issues and last shipped yesterday. openmessaging-java has 722 stars, 219 forks, 13 open issues and last shipped 9 months ago. Vector leads on adoption by 3,057% (22,793 vs 722 stars). Vector is written in Rust under MPL-2.0; openmessaging-java is written in Java under Apache-2.0. Vector has attracted 10% as many forks as stars, openmessaging-java 30%. Vector was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (metrics), 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
| Vector | openmessaging-java | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 722 |
| License | MPL-2.0 | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-11-04 | 2026-01-26 |
| Forks | ⑂ 2.4K | ⑂ 219 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Vector if
- You weight community size — 23K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick openmessaging-java if
- You want the openmessaging-java feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and openmessaging-java fits your workflow better
About Vector
Quickstart • Docs • Guides • Integrations • Chat • Download • Container Images • Rust Crate Docs What is Vector? Vector is a high performance, end to end (agent & aggregator) observability data pipeline that puts you in control of your observability data. [Collect][docs.sources], [transform][docs.transforms], and [route][docs.sinks] all your logs and metrics to any vendors you want today and any other vendors you may want tomorrow. Vector enables dramatic cost reduction, novel data enrichment, and data security where you need it, not where it is most convenient for your…
read the full Vector overview →
About openmessaging-java
A vendor neutral open standard for distributed messaging and streaming OpenMessaging, which includes the establishment of industry guidelines and messaging, streaming specifications to provide a common framework for finance, e commerce, IoT and big data area. The design principles are the cloud oriented, simplicity, flexibility, and language independent in distributed heterogeneous environments. Conformance to these specifications will make it possible to develop a heterogeneous messaging applications across all major platforms and operating systems. Doc API Doc.
read the full openmessaging-java overview →
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Frequently asked questions
Is Vector or openmessaging-java more popular?
Vector has 22,793 GitHub stars and openmessaging-java has 722. Vector has the larger community by that measure.
Are Vector and openmessaging-java free?
Both are open source. Vector is licensed under MPL-2.0 and openmessaging-java under Apache-2.0. Neither carries a licence fee.
What is the difference between Vector and openmessaging-java?
Vector is written in Rust and openmessaging-java 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, Vector or openmessaging-java?
Choose Vector if you want the larger community (22,793 stars) or its MPL-2.0 licence terms. Choose openmessaging-java if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.