head to head · open source
helix-foundry vs ReplicaDB
helix-foundry has 1,992 GitHub stars, 294 forks, 8 open issues and last shipped yesterday. ReplicaDB has 504 stars, 113 forks, 4 open issues and last shipped 8 days ago. helix-foundry leads on adoption by 295% (1,992 vs 504 stars). helix-foundry is written in Go under Apache-2.0; ReplicaDB is written in Java under Apache-2.0. helix-foundry has attracted 15% as many forks as stars, ReplicaDB 22%. helix-foundry 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
| helix-foundry | ReplicaDB | |
|---|---|---|
| GitHub stars | ★ 2.0K | ★ 504 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Go | Java |
| Last push | 2026-11-02 | 2026-10-26 |
| Forks | ⑂ 294 | ⑂ 113 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick helix-foundry if
- You weight community size — 2.0K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- 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 helix-foundry
Helix Foundry Connect your company's data, let an agent draft an ontology over it, and load it into HelixDB as one connected graph you can explore and ask questions of. Connect PostgreSQL, MySQL, Amazon S3, Stripe, PostHog, WorkOS, GitHub, Linear, Granola and Cal.com, and upload documents (Markdown, text, PDF) and table files (CSV, TSV, JSON, JSON Lines, Parquet). An agent drafts the ontology: types, links, the tables and documents each comes from, and rules. You review it, edit it and make a version current. A load writes the version into HelixDB. Explore it as a graph or as records, follow every value back to…
read the full helix-foundry 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 helix-foundry or ReplicaDB more popular?
helix-foundry has 1,992 GitHub stars and ReplicaDB has 504. helix-foundry has the larger community by that measure.
Are helix-foundry and ReplicaDB free?
Both are open source. helix-foundry is licensed under Apache-2.0 and ReplicaDB under Apache-2.0. Neither carries a licence fee.
What is the difference between helix-foundry and ReplicaDB?
helix-foundry is written in Go 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, helix-foundry or ReplicaDB?
Choose helix-foundry if you want the larger community (1,992 stars) or its Apache-2.0 licence terms. Choose ReplicaDB if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.