head to head · open source
flink-cdc vs Seal-Report
flink-cdc has 6,477 GitHub stars, 2,197 forks, 119 open issues and last shipped 2 days ago. Seal-Report has 1,635 stars, 508 forks, 21 open issues and last shipped 2 days ago. flink-cdc leads on adoption by 296% (6,477 vs 1,635 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%. Seal-Report 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 | 2026-09-18 | 2026-09-18 |
| 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 an Apache 2.0 streaming data integration tool built on Apache Flink that moves real time and batch data between databases and downstream systems, and it is aimed at data engineers and platform teams who need change data capture pipelines without writing per source job code.
read the full flink-cdc overview →
About Seal-Report
Seal Report & Task is open source database reporting and task framework written in C for Microsoft .NET. It lives in Data & Analytics and Data Engineering & Integration. It targets reports from SQL and NoSQL sources, plus ETL and batch tasks. License is MIT.
read the full Seal-Report overview →
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Frequently asked questions
Is flink-cdc or Seal-Report more popular?
flink-cdc has 6,477 GitHub stars and Seal-Report has 1,635. 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 (6,477 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.