head to head · open source
Cube vs ReplicaDB
Cube has 21,147 GitHub stars, 2,179 forks, 1,185 open issues and last shipped yesterday. ReplicaDB has 504 stars, 113 forks, 4 open issues and last shipped 8 days ago. Cube leads on adoption by 4,096% (21,147 vs 504 stars). Cube is written in Rust under a custom or non-standard licence; ReplicaDB is written in Java under Apache-2.0. Cube has attracted 10% as many forks as stars, ReplicaDB 22%. Cube was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Cube | ReplicaDB | |
|---|---|---|
| GitHub stars | ★ 21K | ★ 504 |
| License | Custom / other | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-11-02 | 2026-10-26 |
| Forks | ⑂ 2.2K | ⑂ 113 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Cube if
- You weight community size — 21K stars and counting
- You want the Custom / other license terms
- Your stack matches Rust
- 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 Cube
Website • Docs • Examples • Blog • Slack • X Cube Core is the open source semantic layer. Define metrics, dimensions, joins, and access rules once in code, then expose them through SQL, REST, and GraphQL APIs to anything downstream — BI tools, custom applications, or AI agents. Cube Core is headless: it doesn't ship a UI, so you can build the analytics experience that fits your product. Cube Core works with all SQL data sources, including cloud data warehouses like Snowflake, Databricks, and BigQuery; query engines like Presto and Amazon Athena; and application databases like Postgres. It has a built in…
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 Cube or ReplicaDB more popular?
Cube has 21,147 GitHub stars and ReplicaDB has 504. Cube has the larger community by that measure.
Are Cube and ReplicaDB free?
Both are open source. Cube 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 Cube and ReplicaDB?
Cube is written in Rust 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, Cube or ReplicaDB?
Choose Cube if you want the larger community (21,147 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.