head to head · open source
Airbyte vs ReplicaDB
Airbyte has 22,083 GitHub stars, 5,351 forks, 2,395 open issues and last shipped today. ReplicaDB has 500 stars, 114 forks, 4 open issues and last shipped yesterday. Airbyte leads on adoption by 4,317% (22,083 vs 500 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 23%. 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 | ★ 500 |
| License | Custom / other | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 5.4K | ⑂ 114 |
| 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
Airbyte open source data movement project. It lives in data engineering and data integration ecosystem. It moves data from APIs, databases, and files into warehouses, data lakes, and AI applications. It supports ELT and ETL pipelines. It also supports AI agents needing business data.
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 22,083 GitHub stars and ReplicaDB has 500. 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 (22,083 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.