head to head · open source
Prometheus vs sonic
Prometheus has 66,109 GitHub stars, 10,839 forks, 890 open issues and last shipped yesterday. sonic has 21,342 stars, 618 forks, 63 open issues and last shipped 3 days ago. Prometheus leads on adoption by 210% (66,109 vs 21,342 stars). Prometheus is written in Go under Apache-2.0; sonic is written in Rust under MPL-2.0. Prometheus has attracted 16% as many forks as stars, sonic 3%. Prometheus was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Prometheus | sonic | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 21K |
| License | Apache-2.0 | MPL-2.0 |
| Written in | Go | Rust |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 11K | ⑂ 618 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Prometheus if
- You weight community size — 66K 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 Prometheus
Prometheus is an open source monitoring system and time series database, part of the Cloud Native Computing Foundation ecosystem. It collects metrics from configured targets at defined intervals, evaluates alerting rules, and visualizes results. Designed for reliability in dynamic environments, it operates without reliance on distributed storage, ensuring each server node functions independently.
read the full Prometheus overview →
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 Prometheus or sonic more popular?
Prometheus has 66,109 GitHub stars and sonic has 21,342. Prometheus has the larger community by that measure.
Are Prometheus and sonic free?
Both are open source. Prometheus is licensed under Apache-2.0 and sonic under MPL-2.0. Neither carries a licence fee.
What is the difference between Prometheus and sonic?
Prometheus 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, Prometheus or sonic?
Choose Prometheus if you want the larger community (66,109 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.