head to head · open source
etcd vs sonic
etcd has 52,270 GitHub stars, 10,506 forks, 351 open issues and last shipped today. sonic has 21,342 stars, 618 forks, 63 open issues and last shipped 3 days ago. etcd leads on adoption by 145% (52,270 vs 21,342 stars). etcd is written in Go under Apache-2.0; sonic is written in Rust under MPL-2.0. etcd has attracted 20% as many forks as stars, sonic 3%. 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 | sonic | |
|---|---|---|
| GitHub stars | ★ 52K | ★ 21K |
| License | Apache-2.0 | MPL-2.0 |
| Written in | Go | Rust |
| Last push | 2026-09-18 | 2026-09-15 |
| Forks | ⑂ 11K | ⑂ 618 |
| 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 sonic if
- You want the sonic feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches Rust
- You evaluated both and sonic fits your workflow better
About etcd
etcd is an Apache 2.0 licensed, Go written distributed key value store that holds the most critical data of a distributed system in a Raft replicated log, aimed at the platform and infrastructure engineers who must keep that control plane data consistent and available.
About sonic
Sonic is a fast, lightweight, schema less search backend written in Rust and licensed under MPL 2.0, built for developers and platform teams who need search relevance, typo tolerance, and auto completion without the resource cost of a full document oriented search engine.
read the full sonic overview →
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Frequently asked questions
Is etcd or sonic more popular?
etcd has 52,270 GitHub stars and sonic has 21,342. etcd has the larger community by that measure.
Are etcd and sonic free?
Both are open source. etcd is licensed under Apache-2.0 and sonic under MPL-2.0. Neither carries a licence fee.
What is the difference between etcd and sonic?
etcd is written in Go and sonic in Rust. 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 sonic?
Choose etcd if you want the larger community (52,270 stars) or its Apache-2.0 licence terms. Choose sonic if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.