head to head · open source
Airbyte vs chunjun
Airbyte has 22,303 GitHub stars, 5,431 forks, 2,395 open issues and last shipped yesterday. chunjun has 4,106 stars, 1,683 forks, 287 open issues and last shipped 25 days ago. Airbyte leads on adoption by 443% (22,303 vs 4,106 stars). Airbyte is written in Python under a custom or non-standard licence; chunjun is written in Java under Apache-2.0. Airbyte has attracted 24% as many forks as stars, chunjun 41%. Airbyte 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, java), 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
| Airbyte | chunjun | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 4.1K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-11-02 | 2026-10-09 |
| Forks | ⑂ 5.4K | ⑂ 1.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Airbyte if
- You weight community size — 22K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- 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 Airbyte
Open source data movement for ELT pipelines and AI agents — from APIs, databases & files to warehouses, lakes, and AI applications We believe that only an open source solution to data movement can cover the long tail of data sources while empowering data engineers to customize existing connectors. Our ultimate vision is to help you move data from any source to any destination — whether that destination is a data warehouse, a data lake, or an AI agent. Airbyte provides a catalog of 600+ connectors for APIs, databases, data warehouses, data lakes, and AI applications. Screenshot taken from Airbyte Cloud . Pick the…
read the full Airbyte 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 Airbyte or chunjun more popular?
Airbyte has 22,303 GitHub stars and chunjun has 4,106. Airbyte has the larger community by that measure.
Are Airbyte and chunjun free?
Both are open source. Airbyte has no licence declared in this registry, and chunjun is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Airbyte and chunjun?
Airbyte is written in Python 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, Airbyte or chunjun?
Choose Airbyte if you want the larger community (22,303 stars) or its Custom / other licence terms. Choose chunjun if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.