head to head · open source
olake vs Addax
olake has 1,453 GitHub stars, 252 forks, 178 open issues and last shipped yesterday. Addax has 1,441 stars, 343 forks, 5 open issues and last shipped today. olake leads on adoption by 1% (1,453 vs 1,441 stars). olake is written in Go under Apache-2.0; Addax is written in Java under Apache-2.0. olake has attracted 17% as many forks as stars, Addax 24%. Addax was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (database), 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
| olake | Addax | |
|---|---|---|
| GitHub stars | ★ 1.5K | ★ 1.4K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Java |
| Last push | 2026-09-19 | 2026-09-20 |
| Forks | ⑂ 252 | ⑂ 343 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick olake if
- You weight community size — 1.5K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Addax if
- You want the Addax 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 Addax fits your workflow better
About olake
OLake Go is an open source data ingestion engine written in Go and licensed under Apache 2.0. It replicates transactional databases, Apache Kafka, and S3 into Apache Iceberg or plain Parquet, and it provides a web UI and a command line interface for building scalable, real time pipelines. The project sits in the Apache Iceberg and lakehouse ecosystem, where its stated goal is to move data into vendor neutral table formats that can be read by query engines and warehouses.
read the full olake overview →
About Addax
Addax is an open source, Java based ETL tool for moving data between relational databases, NoSQL stores, file formats, and big data systems. It is an actively maintained fork of Alibaba DataX, which the README describes as frozen since 2023, and it is positioned as the maintained successor for users who need continued updates, dependency fixes, and plugin development in the DataX ecosystem.
read the full Addax overview →
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Frequently asked questions
Is olake or Addax more popular?
olake has 1,453 GitHub stars and Addax has 1,441. olake has the larger community by that measure.
Are olake and Addax free?
Both are open source. olake is licensed under Apache-2.0 and Addax under Apache-2.0. Neither carries a licence fee.
What is the difference between olake and Addax?
olake is written in Go and Addax 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, olake or Addax?
Choose olake if you want the larger community (1,453 stars) or its Apache-2.0 licence terms. Choose Addax if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.