head to head · open source
CocoIndex vs fluvio
CocoIndex has 11,566 GitHub stars, 899 forks, 83 open issues and last shipped 2 days ago. fluvio has 5,256 stars, 530 forks, 139 open issues and last shipped 19 days ago. CocoIndex leads on adoption by 120% (11,566 vs 5,256 stars). CocoIndex is written in Rust under Apache-2.0; fluvio is written in Rust under Apache-2.0. CocoIndex has attracted 8% as many forks as stars, fluvio 10%. CocoIndex 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
| CocoIndex | fluvio | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 5.3K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Rust |
| Last push | 2026-09-16 | 2026-08-30 |
| Forks | ⑂ 899 | ⑂ 530 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick CocoIndex if
- You weight community size — 12K stars and counting
- You want the Apache-2.0 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 CocoIndex
CocoIndex is an open source incremental data transformation engine for AI workloads, built in Rust with a Python interface and positioned in the data engineering, ETL, indexing, and AI agent ecosystem. It turns codebases, meeting notes, inboxes, Slack, PDFs, and videos into continuously fresh context for AI agents and LLM applications.
read the full CocoIndex 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 CocoIndex or fluvio more popular?
CocoIndex has 11,566 GitHub stars and fluvio has 5,256. CocoIndex has the larger community by that measure.
Are CocoIndex and fluvio free?
Both are open source. CocoIndex is licensed under Apache-2.0 and fluvio under Apache-2.0. Neither carries a licence fee.
What is the difference between CocoIndex and fluvio?
CocoIndex 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, CocoIndex or fluvio?
Choose CocoIndex if you want the larger community (11,566 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.