head to head · open source
Cube vs fluvio
Cube has 20,857 GitHub stars, 2,138 forks, 1,185 open issues and last shipped yesterday. fluvio has 5,256 stars, 530 forks, 139 open issues and last shipped 19 days ago. Cube leads on adoption by 297% (20,857 vs 5,256 stars). Cube is written in Rust under a custom or non-standard licence; fluvio is written in Rust under Apache-2.0. Cube has attracted 10% as many forks as stars, fluvio 10%. Cube 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
| Cube | fluvio | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 5.3K |
| License | Custom / other | Apache-2.0 |
| Written in | Rust | Rust |
| Last push | 2026-09-17 | 2026-08-30 |
| Forks | ⑂ 2.1K | ⑂ 530 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Cube if
- You weight community size — 21K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick fluvio if
- You want the fluvio feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and fluvio fits your workflow better
About Cube
Cube Core is an open source semantic layer for AI, BI, and embedded analytics. It lives in the data analytics and data engineering ecosystem for SQL warehouses, BI tools, applications, and AI agents. It lets teams define metrics, dimensions, joins, and access rules once in code, then expose them through SQL, REST, and GraphQL APIs. It is headless and ships no user interface.
About fluvio
Fluvio is a distributed data streaming engine written in Rust, distributed under the Apache 2.0 license and developed in the fluvio community repository. It is described as composable, declarative and stateful: a streaming runtime that pairs with Stateful DataFlow, a distributed stream processing framework, so that a single system covers both the transport of event streams and the transformation of that data while it is in motion. The project sits in the Rust and cloud native ecosystem and is published on crates.io, with documentation hosted at fluvio.io.
read the full fluvio overview →
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Frequently asked questions
Is Cube or fluvio more popular?
Cube has 20,857 GitHub stars and fluvio has 5,256. Cube has the larger community by that measure.
Are Cube and fluvio free?
Both are open source. Cube has no licence declared in this registry, and fluvio is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Cube and fluvio?
Cube is written in Rust and fluvio 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, Cube or fluvio?
Choose Cube if you want the larger community (20,857 stars) or its Custom / other licence terms. Choose fluvio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.