head to head · open source
etcd vs TDengine
etcd has 52,441 GitHub stars, 10,552 forks, 351 open issues and last shipped yesterday. TDengine has 25,183 stars, 5,013 forks, 434 open issues and last shipped yesterday. etcd leads on adoption by 108% (52,441 vs 25,183 stars). etcd is written in Go under Apache-2.0; TDengine is written in C under AGPL-3.0. etcd has attracted 20% as many forks as stars, TDengine 20%. 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 | TDengine | |
|---|---|---|
| GitHub stars | ★ 52K | ★ 25K |
| License | Apache-2.0 | AGPL-3.0 |
| Written in | Go | C |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 11K | ⑂ 5.0K |
| 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 TDengine if
- You want the TDengine feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches C
- You evaluated both and TDengine 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 TDengine
English 简体中文 日本語 TDengine Cloud Documentation Learn more about TSDB TDengine 1. Introduction TDengine is an open source, high performance, cloud native and AI powered time series database designed for Internet of Things (IoT), Connected Cars, and Industrial IoT. It enables efficient, real time data ingestion, processing, and analysis of TB and even PB scale data per day, generated by billions of sensors and data collectors. TDengine differentiates itself from other time series databases with the following advantages: High Performance : TDengine is the only time series database to solve the high cardinality issue…
read the full TDengine overview →
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Frequently asked questions
Is etcd or TDengine more popular?
etcd has 52,441 GitHub stars and TDengine has 25,183. etcd has the larger community by that measure.
Are etcd and TDengine free?
Both are open source. etcd is licensed under Apache-2.0 and TDengine under AGPL-3.0. Neither carries a licence fee.
What is the difference between etcd and TDengine?
etcd is written in Go and TDengine 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, etcd or TDengine?
Choose etcd if you want the larger community (52,441 stars) or its Apache-2.0 licence terms. Choose TDengine if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.