head to head · open source
seatunnel vs olake
seatunnel has 9,657 GitHub stars, 2,416 forks, 705 open issues and last shipped today. olake has 1,453 stars, 252 forks, 178 open issues and last shipped yesterday. seatunnel leads on adoption by 565% (9,657 vs 1,453 stars). seatunnel is written in Java under Apache-2.0; olake is written in Go under Apache-2.0. seatunnel has attracted 25% as many forks as stars, olake 17%. seatunnel was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (cdc, change-data-capture, elt), 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
| seatunnel | olake | |
|---|---|---|
| GitHub stars | ★ 9.7K | ★ 1.5K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Go |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 2.4K | ⑂ 252 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick seatunnel if
- You weight community size — 9.7K 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 olake if
- You want the olake 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 olake fits your workflow better
About seatunnel
Apache SeaTunnel is a multimodal, high performance, distributed data integration tool that is capable of synchronizing vast amounts of data daily. It is an Apache Software Foundation project written in Java and released under the Apache 2.0 license, with a home on the web at seatunnel.apache.org. The project has been in development for roughly nine years and has accumulated 9,652 stars and 2,407 forks on GitHub. It sits in the Data & Analytics ecosystem, specifically in data engineering and integration, and it is built around a connector driven model: sources, sinks, and transforms are configured as jobs, and tho…
read the full seatunnel overview →
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 →
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Frequently asked questions
Is seatunnel or olake more popular?
seatunnel has 9,657 GitHub stars and olake has 1,453. seatunnel has the larger community by that measure.
Are seatunnel and olake free?
Both are open source. seatunnel is licensed under Apache-2.0 and olake under Apache-2.0. Neither carries a licence fee.
What is the difference between seatunnel and olake?
seatunnel is written in Java and olake 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, seatunnel or olake?
Choose seatunnel if you want the larger community (9,657 stars) or its Apache-2.0 licence terms. Choose olake if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.