head to head · open source
Airbyte vs ReplicaDB
Airbyte has 22,303 GitHub stars, 5,431 forks, 2,395 open issues and last shipped yesterday. ReplicaDB has 504 stars, 113 forks, 4 open issues and last shipped 8 days ago. Airbyte leads on adoption by 4,325% (22,303 vs 504 stars). Airbyte is written in Python under a custom or non-standard licence; ReplicaDB is written in Java under Apache-2.0. Airbyte has attracted 24% as many forks as stars, ReplicaDB 22%. Airbyte was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (elt, etl, java), 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
| Airbyte | ReplicaDB | |
|---|---|---|
| GitHub stars | ★ 22K | ★ 504 |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-11-02 | 2026-10-26 |
| Forks | ⑂ 5.4K | ⑂ 113 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Airbyte if
- You weight community size — 22K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- 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 Airbyte
Open source data movement for ELT pipelines and AI agents — from APIs, databases & files to warehouses, lakes, and AI applications We believe that only an open source solution to data movement can cover the long tail of data sources while empowering data engineers to customize existing connectors. Our ultimate vision is to help you move data from any source to any destination — whether that destination is a data warehouse, a data lake, or an AI agent. Airbyte provides a catalog of 600+ connectors for APIs, databases, data warehouses, data lakes, and AI applications. Screenshot taken from Airbyte Cloud . Pick the…
read the full Airbyte 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 Airbyte or ReplicaDB more popular?
Airbyte has 22,303 GitHub stars and ReplicaDB has 504. Airbyte has the larger community by that measure.
Are Airbyte and ReplicaDB free?
Both are open source. Airbyte has no licence declared in this registry, and ReplicaDB is licensed under Apache-2.0. Both are free to self-host.
What is the difference between Airbyte and ReplicaDB?
Airbyte is written in Python 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, Airbyte or ReplicaDB?
Choose Airbyte if you want the larger community (22,303 stars) or its Custom / other licence terms. Choose ReplicaDB if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.