head to head · open source
shardingsphere vs chunjun
shardingsphere has 20,800 GitHub stars, 6,900 forks, 197 open issues and last shipped yesterday. chunjun has 4,101 stars, 1,683 forks, 287 open issues and last shipped 10 months ago. shardingsphere leads on adoption by 407% (20,800 vs 4,101 stars). shardingsphere is written in Java under Apache-2.0; chunjun is written in Java under Apache-2.0. shardingsphere has attracted 33% as many forks as stars, chunjun 41%. shardingsphere was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (bigdata), 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
| shardingsphere | chunjun | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 4.1K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Java |
| Last push | 2026-09-17 | 2025-12-02 |
| Forks | ⑂ 6.9K | ⑂ 1.7K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick shardingsphere if
- You weight community size — 21K 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 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 shardingsphere
Apache ShardingSphere is an Apache 2.0 licensed, Java based distributed database ecosystem positioned as Database Plus — a standards and enhancement layer that sits above heterogeneous databases so applications can connect to, govern, and compute across them as if they were one database, aimed at enterprise data architects and developers running sharded, multi database estates.
read the full shardingsphere overview →
About chunjun
ChunJun is a Java based, Apache 2.0 licensed data integration framework that lives in the Apache Flink big data ecosystem. It is a distributed framework for synchronization and calculation between heterogeneous data sources, and it was initially known as FlinkX before being renamed ChunJun on February 22, 2022.
read the full chunjun overview →
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Frequently asked questions
Is shardingsphere or chunjun more popular?
shardingsphere has 20,800 GitHub stars and chunjun has 4,101. shardingsphere has the larger community by that measure.
Are shardingsphere and chunjun free?
Both are open source. shardingsphere is licensed under Apache-2.0 and chunjun under Apache-2.0. Neither carries a licence fee.
What is the difference between shardingsphere and chunjun?
shardingsphere is written in Java 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, shardingsphere or chunjun?
Choose shardingsphere if you want the larger community (20,800 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.