head to head · open source
fluvio vs OpenContracts
fluvio has 5,257 GitHub stars, 530 forks, 139 open issues and last shipped 21 days ago. OpenContracts has 1,484 stars, 189 forks, 11 open issues and last shipped yesterday. fluvio leads on adoption by 254% (5,257 vs 1,484 stars). fluvio is written in Rust under Apache-2.0; OpenContracts is written in Python under MIT. fluvio has attracted 10% as many forks as stars, OpenContracts 13%. OpenContracts 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
| fluvio | OpenContracts | |
|---|---|---|
| GitHub stars | ★ 5.3K | ★ 1.5K |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-08-30 | 2026-09-19 |
| Forks | ⑂ 530 | ⑂ 189 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fluvio if
- You weight community size — 5.3K 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 OpenContracts if
- You want the OpenContracts feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and OpenContracts fits your workflow better
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 →
About OpenContracts
OpenContracts is an MIT licensed, self hosted document intelligence platform that turns a repository of documents into a programmable citation graph, built for builders and hackers who need a document management system for the agentic world as much as a place to store files.
read the full OpenContracts overview →
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Frequently asked questions
Is fluvio or OpenContracts more popular?
fluvio has 5,257 GitHub stars and OpenContracts has 1,484. fluvio has the larger community by that measure.
Are fluvio and OpenContracts free?
Both are open source. fluvio is licensed under Apache-2.0 and OpenContracts under MIT. Neither carries a licence fee.
What is the difference between fluvio and OpenContracts?
fluvio is written in Rust and OpenContracts in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fluvio or OpenContracts?
Choose fluvio if you want the larger community (5,257 stars) or its Apache-2.0 licence terms. Choose OpenContracts if its feature set, stack or MIT licence fits better. Both are self-hostable.