head to head · open source
flink-cdc vs fluvio
flink-cdc has 6,477 GitHub stars, 2,197 forks, 119 open issues and last shipped 2 days ago. fluvio has 5,257 stars, 530 forks, 139 open issues and last shipped 21 days ago. flink-cdc leads on adoption by 23% (6,477 vs 5,257 stars). flink-cdc is written in Java under Apache-2.0; fluvio is written in Rust under Apache-2.0. flink-cdc has attracted 34% as many forks as stars, fluvio 10%. flink-cdc was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (data-integration), 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
| flink-cdc | fluvio | |
|---|---|---|
| GitHub stars | ★ 6.5K | ★ 5.3K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Rust |
| Last push | 2026-09-18 | 2026-08-30 |
| Forks | ⑂ 2.2K | ⑂ 530 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick flink-cdc if
- You weight community size — 6.5K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- 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 flink-cdc
Flink CDC is an Apache 2.0 streaming data integration tool built on Apache Flink that moves real time and batch data between databases and downstream systems, and it is aimed at data engineers and platform teams who need change data capture pipelines without writing per source job code.
read the full flink-cdc overview →
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 flink-cdc or fluvio more popular?
flink-cdc has 6,477 GitHub stars and fluvio has 5,257. flink-cdc has the larger community by that measure.
Are flink-cdc and fluvio free?
Both are open source. flink-cdc is licensed under Apache-2.0 and fluvio under Apache-2.0. Neither carries a licence fee.
What is the difference between flink-cdc and fluvio?
flink-cdc is written in Java 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, flink-cdc or fluvio?
Choose flink-cdc if you want the larger community (6,477 stars) or its Apache-2.0 licence terms. Choose fluvio if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.