head to head · open source
OpenObserve vs transmittable-thread-local
OpenObserve has 22,803 GitHub stars, 1,179 forks, 598 open issues and last shipped today. transmittable-thread-local has 8,306 stars, 1,720 forks, 57 open issues and last shipped 5 months ago. OpenObserve leads on adoption by 175% (22,803 vs 8,306 stars). OpenObserve is written in TypeScript under AGPL-3.0; transmittable-thread-local is written in Java under Apache-2.0. OpenObserve has attracted 5% as many forks as stars, transmittable-thread-local 21%. OpenObserve was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (apm), 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
| OpenObserve | transmittable-thread-local | |
|---|---|---|
| GitHub stars | ★ 23K | ★ 8.3K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-11-05 | 2026-06-18 |
| Forks | ⑂ 1.2K | ⑂ 1.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenObserve if
- You weight community size — 23K stars and counting
- You want the AGPL-3.0 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 OpenObserve
Open source Datadog alternative for logs, metrics, traces, and frontend monitoring. Modern observability platform: 10x easier, 140x lower storage cost, high performance, petabyte scale. Cloud · Documentation · Slack · Quickstart OpenObserve (O2) is a cloud native observability platform for logs, metrics, traces, analytics, Real User Monitoring (RUM), and AI/LLM observability. It's a cost effective alternative to Datadog, Splunk, and Elasticsearch for teams that need full observability without the complexity or cost — with Parquet columnar storage and an S3 native design that cuts storage costs by up to 140x…
read the full OpenObserve overview →
About transmittable-thread-local
[!IMPORTANT] 🚧 这个分支是 TransmittableThreadLocal(TTL) v3 ，在开发中还没有发布。 v3 的版本说明、工作项列表及其进展，参见 issue 432。 👉 目前使用中的稳定发布版本 v2.x 在 分支 2.x 上。 📖 English Documentation 📖 中文文档 🔧 功能 🎨 需求场景 👥 User Guide 1. 简单使用 2. 保证线程池中传递值 2.1 修饰 Runnable 和 Callable 整个过程的完整时序图 2.2 修饰线程池 2.3 使用 Java Agent 来修饰 JDK 线程池实现类 Java Agent 的启动参数配置 🔌 Java API Docs 🍪 Maven依赖 🔨 关于编译构建 ❓ FAQ ✨ 使用 TTL 的好处与必要性 🗿 更多文档 📚 相关资料 JDK Core Classes 💗 Who Used 👷 Contributors 🔧 功能 👉 TransmittableThreadLocal ( TTL )：在使用线程池等会池化复用线程的执行组件情况下，提供 ThreadLocal 值的传递功能，解决异步执行时上下文传递的问题。一个 Java 标准库本应为框架/中间件设施开发提供的标配能力，本库功能聚焦 & 0依赖，支持 Java 6 21 。 JDK 的…
read the full transmittable-thread-local overview →
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Frequently asked questions
Is OpenObserve or transmittable-thread-local more popular?
OpenObserve has 22,803 GitHub stars and transmittable-thread-local has 8,306. OpenObserve has the larger community by that measure.
Are OpenObserve and transmittable-thread-local free?
Both are open source. OpenObserve is licensed under AGPL-3.0 and transmittable-thread-local under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenObserve and transmittable-thread-local?
OpenObserve 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, OpenObserve or transmittable-thread-local?
Choose OpenObserve if you want the larger community (22,803 stars) or its AGPL-3.0 licence terms. Choose transmittable-thread-local if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.