head to head · open source
flink-cdc vs olake
flink-cdc has 6,491 GitHub stars, 2,205 forks, 119 open issues and last shipped yesterday. olake has 1,576 stars, 273 forks, 178 open issues and last shipped 2 days ago. flink-cdc leads on adoption by 312% (6,491 vs 1,576 stars). flink-cdc is written in Java under Apache-2.0; olake is written in Go under Apache-2.0. flink-cdc has attracted 34% as many forks as stars, olake 17%. flink-cdc was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 5 topic tags (cdc, change-data-capture, data-pipeline, 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
| flink-cdc | olake | |
|---|---|---|
| GitHub stars | ★ 6.5K | ★ 1.6K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Java | Go |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 2.2K | ⑂ 273 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick flink-cdc if
- You weight community size — 6.5K 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 flink-cdc
Flink CDC is a distributed data integration tool for real time data and batch data, built on top of Apache Flink. It prioritizes efficient end to end data integration and offers enhanced functionalities such as full database synchronization, sharding table synchronization, schema evolution and data transformation. API Layers Flink CDC provides three API layers for different usage scenarios: 1. YAML API (Pipeline API) The YAML API provides a declarative, zero code approach to define data pipelines. Users describe the source, sink, routing, transformation, and schema evolution rules in a YAML file and submit it…
read the full flink-cdc overview →
About olake
OLake Go OLake Go is a high performance, open source data ingestion engine for replicating databases, S3, and Kafka into Apache Iceberg (or plain Parquet). Built for scalable, real time pipelines, OLake Go provides a simple web UI and CLI used to ingest into vendor lock in free Iceberg tables supporting all the query engines/warehouses. Read the docs and benchmarks at olake.io/docs . Join our active community on Slack . [!NOTE] 🎉 OLake Fusion is now live! — Automate your Apache Iceberg Table Maintenance. Check it out here → github.com/datazip inc/olake fusion 🎉 OLake Go — Super fast Sync to Apache Iceberg…
read the full olake overview →
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Frequently asked questions
Is flink-cdc or olake more popular?
flink-cdc has 6,491 GitHub stars and olake has 1,576. flink-cdc has the larger community by that measure.
Are flink-cdc and olake free?
Both are open source. flink-cdc is licensed under Apache-2.0 and olake under Apache-2.0. Neither carries a licence fee.
What is the difference between flink-cdc and olake?
flink-cdc 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, flink-cdc or olake?
Choose flink-cdc if you want the larger community (6,491 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.