head to head · open source
etcd vs Apache IoTDB
etcd has 52,441 GitHub stars, 10,552 forks, 351 open issues and last shipped yesterday. Apache IoTDB has 6,425 stars, 1,163 forks, 734 open issues and last shipped yesterday. etcd leads on adoption by 716% (52,441 vs 6,425 stars). etcd is written in Go under Apache-2.0; Apache IoTDB is written in Java under Apache-2.0. etcd has attracted 20% as many forks as stars, Apache IoTDB 18%. etcd was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (database), 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
| etcd | Apache IoTDB | |
|---|---|---|
| GitHub stars | ★ 52K | ★ 6.4K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 11K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick etcd if
- You weight community size — 52K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Apache IoTDB if
- You want the Apache IoTDB 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 Apache IoTDB fits your workflow better
About etcd
etcd Note : The main branch may be in an unstable or even broken state during development. For stable versions, see [releases][github release]. etcd is a distributed reliable key value store for the most critical data of a distributed system, with a focus on being: Simple : well defined, user facing API (gRPC) Secure : automatic TLS with optional client cert authentication Fast : benchmarked 10,000 writes/sec Reliable : properly distributed using Raft etcd is written in Go and uses the [Raft][] consensus algorithm to manage a highly available replicated log. etcd is used in production by many companies, and the…
About Apache IoTDB
English 中文 IoTDB Overview IoTDB (Internet of Things Database) is a data management system for time series data, which provides users with specific services, including data collection, storage and analysis. Due to its lightweight structure, high performance and usable features, together with its seamless integration with the Hadoop and Spark ecosystem, IoTDB meets the requirements of massive dataset storage, high throughput data input, and complex data analysis in the industrial IoT field. Click for More Information IoTDB depends on TsFile which is a columnar storage file format designed for time series data. The…
read the full Apache IoTDB overview →
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Frequently asked questions
Is etcd or Apache IoTDB more popular?
etcd has 52,441 GitHub stars and Apache IoTDB has 6,425. etcd has the larger community by that measure.
Are etcd and Apache IoTDB free?
Both are open source. etcd is licensed under Apache-2.0 and Apache IoTDB under Apache-2.0. Neither carries a licence fee.
What is the difference between etcd and Apache IoTDB?
etcd is written in Go and Apache IoTDB 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, etcd or Apache IoTDB?
Choose etcd if you want the larger community (52,441 stars) or its Apache-2.0 licence terms. Choose Apache IoTDB if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.