head to head · open source
SigNoz vs client_java
SigNoz has 32,525 GitHub stars, 2,576 forks, 1,557 open issues and last shipped yesterday. client_java has 2,291 stars, 837 forks, 23 open issues and last shipped yesterday. SigNoz leads on adoption by 1,320% (32,525 vs 2,291 stars). SigNoz is written in TypeScript under a custom or non-standard licence; client_java is written in Java under Apache-2.0. SigNoz has attracted 8% as many forks as stars, client_java 37%. SigNoz 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
| SigNoz | client_java | |
|---|---|---|
| GitHub stars | ★ 33K | ★ 2.3K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 2.6K | ⑂ 837 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SigNoz if
- You weight community size — 33K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick client_java if
- You want the client_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 client_java fits your workflow better
About SigNoz
中文 · Deutsch · Português SigNoz is an open source observability platform built on OpenTelemetry. We’re building an enterprise grade alternative to fragmented monitoring stacks, with logs, metrics, traces, alerts, and dashboards in one place. Choose how to run SigNoz SigNoz Cloud (Recommended) Fully managed SigNoz with a 30 day free trial, no credit card required, usage based pricing that starts at $49, and regional data hosting. Start free → Enterprise Enterprise Cloud, BYOC, or Enterprise Self Hosted with compliance, support, custom retention, RBAC, ingestion controls, data residency, and region selection…
read the full SigNoz overview →
About client_java
Prometheus Java Metrics Library [![Build][build badge]][build workflow] [build badge]: [build workflow]: Documentation Contributing and community See CONTRIBUTING.md and the community section of the Prometheus homepage. The Prometheus Java community is present on the CNCF Slack on prometheus java , and we have a fortnightly community call in the Prometheus public calendar. Previous Releases The source code for 0.16.0 and older is on the simpleclient branch. License Apache License 2.0, see LICENSE.
read the full client_java overview →
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Frequently asked questions
Is SigNoz or client_java more popular?
SigNoz has 32,525 GitHub stars and client_java has 2,291. SigNoz has the larger community by that measure.
Are SigNoz and client_java free?
Both are open source. SigNoz has no licence declared in this registry, and client_java is licensed under Apache-2.0. Both are free to self-host.
What is the difference between SigNoz and client_java?
SigNoz is written in TypeScript and client_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, SigNoz or client_java?
Choose SigNoz if you want the larger community (32,525 stars) or its Custom / other licence terms. Choose client_java if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.