head to head · open source
CocoIndex vs flink-cdc
CocoIndex has 11,812 GitHub stars, 923 forks, 83 open issues and last shipped yesterday. flink-cdc has 6,493 stars, 2,205 forks, 119 open issues and last shipped yesterday. CocoIndex leads on adoption by 82% (11,812 vs 6,493 stars). CocoIndex is written in Rust under Apache-2.0; flink-cdc is written in Java under Apache-2.0. CocoIndex has attracted 8% as many forks as stars, flink-cdc 34%. CocoIndex was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (change-data-capture, 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 | flink-cdc | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 6.5K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 923 | ⑂ 2.2K |
| 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 flink-cdc if
- You want the flink-cdc 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 flink-cdc 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 flink-cdc
Flink CDC is a distributed data integration tool for real time data and batch data, built on top of Apache Flink. It prioritizes efficient end to end data integration and offers enhanced functionalities such as full database synchronization, sharding table synchronization, schema evolution and data transformation. API Layers Flink CDC provides three API layers for different usage scenarios: 1. YAML API (Pipeline API) The YAML API provides a declarative, zero code approach to define data pipelines. Users describe the source, sink, routing, transformation, and schema evolution rules in a YAML file and submit it…
read the full flink-cdc overview →
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Frequently asked questions
Is CocoIndex or flink-cdc more popular?
CocoIndex has 11,812 GitHub stars and flink-cdc has 6,493. CocoIndex has the larger community by that measure.
Are CocoIndex and flink-cdc free?
Both are open source. CocoIndex is licensed under Apache-2.0 and flink-cdc under Apache-2.0. Neither carries a licence fee.
What is the difference between CocoIndex and flink-cdc?
CocoIndex is written in Rust and flink-cdc 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 flink-cdc?
Choose CocoIndex if you want the larger community (11,812 stars) or its Apache-2.0 licence terms. Choose flink-cdc if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.