What is SeaTunnel used for?

SeaTunnel is a distributed, high-performance data integration tool supporting batch, streaming, CDC, and multi-engine execution. It is a good fit for moving data between OLTP databases and data warehouses, streaming data ingestion from Kafka or Pulsar to lakehouses, and synchronizing schema changes across systems.

Is SeaTunnel open source?

Yes. SeaTunnel is open source under the Apache-2.0 licence. Its source code is on GitHub at apache/seatunnel and is written mainly in Java.

Yes. SeaTunnel is open source, so the software itself is free to use.

Can I self-host SeaTunnel?

Yes. SeaTunnel can be self-hosted on your own server or infrastructure.

What is SeaTunnel an alternative to?

SeaTunnel is an open-source alternative to Fivetran. Other open-source alternatives to Fivetran include Airbyte, Duckle and Dozer.

Is SeaTunnel actively maintained?

Yes. The most recent commit to SeaTunnel was on 13 October 2026, and the latest release is v3.0.0, published on 29 September 2026. The project has 9.7k stars on GitHub.

SeaTunnel: open-source alternative to Fivetran

About SeaTunnel

SeaTunnel is a production-grade integration layer for distributed data systems, offering fault tolerance, schema evolution, and multi-engine execution across batch, streaming, CDC, multimodal, and AI workloads. It supports three execution engines: Zeta, Flink, and Spark.

The tool follows an EtLT pattern, handling extract, lightweight transform, and load, while allowing downstream systems to handle heavy transformations. It connects to various upstream sources and downstream targets, including databases, streaming platforms, and data warehouses.

Key features

Automatic schema evolution detection and propagation
Real-time CDC with low latency and batch-to-stream handoff
Exactly-once semantics with checkpoint-based fault tolerance
Multi-engine execution (Zeta, Flink, Spark)
Support for batch, streaming, and CDC modes

Good fit for

Moving data between OLTP databases and data warehouses
Streaming data ingestion from Kafka or Pulsar to lakehouses
Synchronizing schema changes across systems

Built with: Java tools
Tags: data-integration; etl; cdc; streaming; batch

SeaTunnel: questions and answers

What is SeaTunnel used for?: SeaTunnel is a distributed, high-performance data integration tool supporting batch, streaming, CDC, and multi-engine execution. It is a good fit for moving data between OLTP databases and data warehouses, streaming data ingestion from Kafka or Pulsar to lakehouses, and synchronizing schema changes across systems.
Is SeaTunnel open source?: Yes. SeaTunnel is open source under the Apache-2.0 licence. Its source code is on GitHub at apache/seatunnel and is written mainly in Java.
Is SeaTunnel free?: Yes. SeaTunnel is open source, so the software itself is free to use.
Can I self-host SeaTunnel?: Yes. SeaTunnel can be self-hosted on your own server or infrastructure.
What is SeaTunnel an alternative to?: SeaTunnel is an open-source alternative to Fivetran. Other open-source alternatives to Fivetran include Airbyte, Duckle and Dozer.
Is SeaTunnel actively maintained?: Yes. The most recent commit to SeaTunnel was on 13 October 2026, and the latest release is v3.0.0, published on 29 September 2026. The project has 9.7k stars on GitHub.