head to head · open source
Seal-Report vs ReplicaDB
Seal-Report has 1,642 GitHub stars, 509 forks, 21 open issues and last shipped 2 days ago. ReplicaDB has 504 stars, 113 forks, 4 open issues and last shipped 2 days ago. Seal-Report leads on adoption by 226% (1,642 vs 504 stars). Seal-Report is written in C# under MIT; ReplicaDB is written in Java under Apache-2.0. Seal-Report has attracted 31% as many forks as stars, ReplicaDB 22%. ReplicaDB 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
| Seal-Report | ReplicaDB | |
|---|---|---|
| GitHub stars | ★ 1.6K | ★ 504 |
| License | MIT | Apache-2.0 |
| Written in | C# | Java |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 509 | ⑂ 113 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Seal-Report if
- You weight community size — 1.6K stars and counting
- You want the MIT license terms
- Your stack matches C#
- You value the larger contributor base for long-term maintenance
pick ReplicaDB if
- You want the ReplicaDB feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and ReplicaDB fits your workflow better
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 →
About ReplicaDB
ReplicaDB is a high performance, open source command line tool for bulk data replication between heterogeneous databases. It enables efficient ETL/ELT workflows by transferring data in parallel between Oracle, PostgreSQL, MySQL, MongoDB, SQL Server, and other databases without requiring database agents or triggers. ReplicaDB supports a wide range of data sources including relational databases (Oracle, PostgreSQL, MySQL, MariaDB, SQL Server, SQLite, IBM DB2 LUW and DB2 for i), NoSQL databases (MongoDB), data virtualization platforms (Denodo), file formats (CSV), cloud storage (Amazon S3), and streaming platforms…
read the full ReplicaDB overview →
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Frequently asked questions
Is Seal-Report or ReplicaDB more popular?
Seal-Report has 1,642 GitHub stars and ReplicaDB has 504. Seal-Report has the larger community by that measure.
Are Seal-Report and ReplicaDB free?
Both are open source. Seal-Report is licensed under MIT and ReplicaDB under Apache-2.0. Neither carries a licence fee.
What is the difference between Seal-Report and ReplicaDB?
Seal-Report is written in C# and ReplicaDB in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Seal-Report or ReplicaDB?
Choose Seal-Report if you want the larger community (1,642 stars) or its MIT licence terms. Choose ReplicaDB if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.