head to head · open source
flink-cdc vs Seal-Report
flink-cdc has 6,491 GitHub stars, 2,205 forks, 119 open issues and last shipped yesterday. Seal-Report has 1,642 stars, 508 forks, 21 open issues and last shipped 2 days ago. flink-cdc leads on adoption by 295% (6,491 vs 1,642 stars). flink-cdc is written in Java under Apache-2.0; Seal-Report is written in C# under MIT. flink-cdc has attracted 34% as many forks as stars, Seal-Report 31%. flink-cdc was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (etl, mysql), 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 | Seal-Report | |
|---|---|---|
| GitHub stars | ★ 6.5K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Java | C# |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 2.2K | ⑂ 508 |
| 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 Seal-Report if
- You want the Seal-Report feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and Seal-Report 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 Seal-Report
Seal Report & Task Seal Report & Task is a complete open source framework for producing reports from any database or NoSQL source, and for performing complex tasks (ETL, batch). Entirely written in C for Microsoft .NET, and free for everyone under the MIT License . The product focuses on easy installation and report design : once set up, reports can be built and published in a minute. Web site & quick start guides : sealreport.org Live demo of the Web Report Server: sealreport.org/demo Free support & community : GitHub Discussions Main Features Dynamic SQL sources : Use your own SQL, or let the Seal engine build…
read the full Seal-Report overview →
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Frequently asked questions
Is flink-cdc or Seal-Report more popular?
flink-cdc has 6,491 GitHub stars and Seal-Report has 1,642. flink-cdc has the larger community by that measure.
Are flink-cdc and Seal-Report free?
Both are open source. flink-cdc is licensed under Apache-2.0 and Seal-Report under MIT. Neither carries a licence fee.
What is the difference between flink-cdc and Seal-Report?
flink-cdc is written in Java and Seal-Report in C#. 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 Seal-Report?
Choose flink-cdc if you want the larger community (6,491 stars) or its Apache-2.0 licence terms. Choose Seal-Report if its feature set, stack or MIT licence fits better. Both are self-hostable.