head to head · open source
CocoIndex vs hop
CocoIndex has 11,566 GitHub stars, 899 forks, 83 open issues and last shipped 2 days ago. hop has 1,465 stars, 477 forks, 431 open issues and last shipped yesterday. CocoIndex leads on adoption by 689% (11,566 vs 1,465 stars). CocoIndex is written in Rust under Apache-2.0; hop is written in Java under Apache-2.0. CocoIndex has attracted 8% as many forks as stars, hop 33%. hop was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (etl), 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
| CocoIndex | hop | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.5K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-09-16 | 2026-09-17 |
| Forks | ⑂ 899 | ⑂ 477 |
| 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 hop if
- You want the hop 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 hop 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 hop
Apache Hop is an open source data and metadata orchestration platform in the Apache ecosystem. It is written in Java, licensed under Apache 2.0, and positioned for data engineering and integration work. Its stated aim is to facilitate all aspects of data and metadata orchestration.
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Frequently asked questions
Is CocoIndex or hop more popular?
CocoIndex has 11,566 GitHub stars and hop has 1,465. CocoIndex has the larger community by that measure.
Are CocoIndex and hop free?
Both are open source. CocoIndex is licensed under Apache-2.0 and hop under Apache-2.0. Neither carries a licence fee.
What is the difference between CocoIndex and hop?
CocoIndex is written in Rust and hop 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 hop?
Choose CocoIndex if you want the larger community (11,566 stars) or its Apache-2.0 licence terms. Choose hop if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.