head to head · open source
SigNoz vs resilience4j
SigNoz has 32,146 GitHub stars, 2,497 forks, 1,557 open issues and last shipped today. resilience4j has 10,765 stars, 1,502 forks, 306 open issues and last shipped 20 days ago. SigNoz leads on adoption by 199% (32,146 vs 10,765 stars). SigNoz is written in TypeScript under a custom or non-standard licence; resilience4j is written in Java under Apache-2.0. SigNoz has attracted 8% as many forks as stars, resilience4j 14%. 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 | resilience4j | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 11K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-09-20 | 2026-08-31 |
| Forks | ⑂ 2.5K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick SigNoz if
- You weight community size — 32K 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 resilience4j if
- You want the resilience4j 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 resilience4j fits your workflow better
About SigNoz
SigNoz is an open source, OpenTelemetry native observability platform for cloud native applications. It unifies logs, metrics, traces, alerts, and dashboards into a single tool, replacing fragmented monitoring stacks with a correlated signal pipeline. It lives in the observability ecosystem alongside tools like Prometheus, Jaeger, and Grafana, and is positioned as an open alternative to Datadog.
read the full SigNoz overview →
About resilience4j
Resilience4j is a lightweight fault tolerance library for Java, designed around functional programming. It lives in the Java ecosystem and is distributed under the Apache 2.0 license. The library provides higher order functions, called decorators, that enhance any functional interface, lambda expression or method reference with a Circuit Breaker, Rate Limiter, Retry or Bulkhead. Version 3 of the library requires Java 21, while the project originated as a library for Java 8. The repository has been active for roughly eleven years and carries 10,760 stars, 1,499 forks and 306 open issues.
read the full resilience4j overview →
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Frequently asked questions
Is SigNoz or resilience4j more popular?
SigNoz has 32,146 GitHub stars and resilience4j has 10,765. SigNoz has the larger community by that measure.
Are SigNoz and resilience4j free?
Both are open source. SigNoz has no licence declared in this registry, and resilience4j is licensed under Apache-2.0. Both are free to self-host.
What is the difference between SigNoz and resilience4j?
SigNoz is written in TypeScript and resilience4j 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 resilience4j?
Choose SigNoz if you want the larger community (32,146 stars) or its Custom / other licence terms. Choose resilience4j if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.