head to head · open source
CocoIndex vs chunjun
CocoIndex has 11,812 GitHub stars, 923 forks, 83 open issues and last shipped yesterday. chunjun has 4,106 stars, 1,683 forks, 287 open issues and last shipped 25 days ago. CocoIndex leads on adoption by 188% (11,812 vs 4,106 stars). CocoIndex is written in Rust under Apache-2.0; chunjun is written in Java under Apache-2.0. CocoIndex has attracted 8% as many forks as stars, chunjun 41%. 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 | chunjun | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 4.1K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-11-02 | 2026-10-09 |
| Forks | ⑂ 923 | ⑂ 1.7K |
| 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 chunjun if
- You want the chunjun feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and chunjun fits your workflow better
About CocoIndex
Your agents deserve fresh context. Star us ❤️ → · · · CocoIndex turns codebases, meeting notes, inboxes, Slack, PDFs, and videos into live, continuously fresh context for your AI agents and LLM apps to reason over effectively — with minimal incremental processing. Get your production AI agent ready in 10 minutes with reliable, continuously fresh data — no stale batches, no context gap Incremental · only the delta · Any scale · parallel by default · Declarative · Python, 5 min Deutsch English Español français 日本語 한국어 Português Русский 中文 Built with CocoIndex ❤️ <img src=" alt="CocoIndex code — flagship MCP server…
read the full CocoIndex overview →
About chunjun
ChunJun Introduce ChunJun is a distributed integration framework, and currently is based on Apache Flink. It was initially known as FlinkX and renamed ChunJun on February 22, 2022. It can realize data synchronization and calculation between various heterogeneous data sources. ChunJun has been deployed and running stably in thousands of companies so far. Official website of ChunJun: Features of ChunJun ChunJun abstracts different databases into reader/source plugins, writer/sink plugins and lookup plugins, and it has the following features: Based on the real time computing engine Flink, and supports JSON template…
read the full chunjun overview →
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Frequently asked questions
Is CocoIndex or chunjun more popular?
CocoIndex has 11,812 GitHub stars and chunjun has 4,106. CocoIndex has the larger community by that measure.
Are CocoIndex and chunjun free?
Both are open source. CocoIndex is licensed under Apache-2.0 and chunjun under Apache-2.0. Neither carries a licence fee.
What is the difference between CocoIndex and chunjun?
CocoIndex is written in Rust and chunjun in Java. 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 chunjun?
Choose CocoIndex if you want the larger community (11,812 stars) or its Apache-2.0 licence terms. Choose chunjun if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.