head to head · open source
SigNoz vs loongcollector
SigNoz has 32,146 GitHub stars, 2,497 forks, 1,557 open issues and last shipped today. loongcollector has 2,196 stars, 450 forks, 166 open issues and last shipped today. SigNoz leads on adoption by 1,364% (32,146 vs 2,196 stars). SigNoz is written in TypeScript under a custom or non-standard licence; loongcollector is written in C++ under Apache-2.0. SigNoz has attracted 8% as many forks as stars, loongcollector 20%. SigNoz was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (apm, log, observability), 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 | loongcollector | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 2.2K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | C++ |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 2.5K | ⑂ 450 |
| 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 loongcollector if
- You want the loongcollector feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C++
- You evaluated both and loongcollector 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 loongcollector
LoongCollector is an Apache 2.0, C++ based observability data collector from Alibaba that runs as a universal node agent for logs, metrics, traces, events and profiles, and it is built for platform, SRE and security teams operating Kubernetes clusters and high volume production fleets.
read the full loongcollector overview →
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Frequently asked questions
Is SigNoz or loongcollector more popular?
SigNoz has 32,146 GitHub stars and loongcollector has 2,196. SigNoz has the larger community by that measure.
Are SigNoz and loongcollector free?
Both are open source. SigNoz has no licence declared in this registry, and loongcollector is licensed under Apache-2.0. Both are free to self-host.
What is the difference between SigNoz and loongcollector?
SigNoz is written in TypeScript and loongcollector in C++. 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 loongcollector?
Choose SigNoz if you want the larger community (32,146 stars) or its Custom / other licence terms. Choose loongcollector if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.