head to head · open source
SigNoz vs transmittable-thread-local
SigNoz has 32,146 GitHub stars, 2,497 forks, 1,557 open issues and last shipped today. transmittable-thread-local has 8,308 stars, 1,723 forks, 57 open issues and last shipped 3 months ago. SigNoz leads on adoption by 287% (32,146 vs 8,308 stars). SigNoz is written in TypeScript under a custom or non-standard licence; transmittable-thread-local is written in Java under Apache-2.0. SigNoz has attracted 8% as many forks as stars, transmittable-thread-local 21%. SigNoz was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (apm, distributed-tracing), 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 | transmittable-thread-local | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 8.3K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-09-20 | 2026-06-18 |
| Forks | ⑂ 2.5K | ⑂ 1.7K |
| 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 transmittable-thread-local if
- You want the transmittable-thread-local 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 transmittable-thread-local 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 transmittable-thread-local
TransmittableThreadLocal (TTL) is a small, zero dependency Java library from Alibaba that provides an enhanced InheritableThreadLocal capable of transmitting values between threads even when those threads are pooled and reused. It lives in the Java ecosystem and targets framework and middleware developers who need reliable context propagation across asynchronous execution boundaries. The library is Apache 2.0 licensed, roughly 1000 SLOC, and supports Java 6 through 21.
read the full transmittable-thread-local overview →
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Frequently asked questions
Is SigNoz or transmittable-thread-local more popular?
SigNoz has 32,146 GitHub stars and transmittable-thread-local has 8,308. SigNoz has the larger community by that measure.
Are SigNoz and transmittable-thread-local free?
Both are open source. SigNoz has no licence declared in this registry, and transmittable-thread-local is licensed under Apache-2.0. Both are free to self-host.
What is the difference between SigNoz and transmittable-thread-local?
SigNoz is written in TypeScript and transmittable-thread-local 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 transmittable-thread-local?
Choose SigNoz if you want the larger community (32,146 stars) or its Custom / other licence terms. Choose transmittable-thread-local if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.