head to head · open source
flink-cdc vs whodb
flink-cdc has 6,477 GitHub stars, 2,197 forks, 119 open issues and last shipped 2 days ago. whodb has 5,033 stars, 240 forks, 42 open issues and last shipped today. flink-cdc leads on adoption by 29% (6,477 vs 5,033 stars). flink-cdc is written in Java under Apache-2.0; whodb is written in Go under Apache-2.0. flink-cdc has attracted 34% as many forks as stars, whodb 5%. whodb was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (data-integration, data-pipeline), 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
| flink-cdc | whodb | |
|---|---|---|
| GitHub stars | ★ 6.5K | ★ 5.0K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Go |
| Last push | 2026-09-18 | 2026-09-20 |
| Forks | ⑂ 2.2K | ⑂ 240 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick flink-cdc if
- You weight community size — 6.5K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Java
- You value the larger contributor base for long-term maintenance
pick whodb if
- You want the whodb feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and whodb fits your workflow better
About flink-cdc
Flink CDC is an Apache 2.0 streaming data integration tool built on Apache Flink that moves real time and batch data between databases and downstream systems, and it is aimed at data engineers and platform teams who need change data capture pipelines without writing per source job code.
read the full flink-cdc overview →
About whodb
WhoDB is an Apache 2.0, Go based open source data workspace that gives users one place to explore databases, edit data, run queries, and understand how a schema fits together. It runs in the browser, is available as a desktop application, and also provides a terminal CLI, so it fits the open source data engineering and integration ecosystem for internal tools, data platforms, database management, data governance, data integration, data pipelines, data catalogs, data lineage, and ER diagrams.
read the full whodb overview →
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Frequently asked questions
Is flink-cdc or whodb more popular?
flink-cdc has 6,477 GitHub stars and whodb has 5,033. flink-cdc has the larger community by that measure.
Are flink-cdc and whodb free?
Both are open source. flink-cdc is licensed under Apache-2.0 and whodb under Apache-2.0. Neither carries a licence fee.
What is the difference between flink-cdc and whodb?
flink-cdc is written in Java and whodb in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, flink-cdc or whodb?
Choose flink-cdc if you want the larger community (6,477 stars) or its Apache-2.0 licence terms. Choose whodb if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.