head to head · open source
xerj vs arcadedb
xerj has 18,817 GitHub stars, 1,435 forks, 16 open issues and last shipped yesterday. arcadedb has 1,230 stars, 163 forks, 167 open issues and last shipped yesterday. xerj leads on adoption by 1,430% (18,817 vs 1,230 stars). xerj is written in Rust under Apache-2.0; arcadedb is written in Java under Apache-2.0. xerj has attracted 8% as many forks as stars, arcadedb 13%. xerj was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (database), 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
| xerj | arcadedb | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 1.2K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.4K | ⑂ 163 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick xerj if
- You weight community size — 19K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick arcadedb if
- You want the arcadedb 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 arcadedb fits your workflow better
About xerj
XERJ XERJ is a community trusted local AI search that indexes any folder automatically, so your coding agent stops burning tokens reading files one by one and pulls the exact code it needs instead. Reference coding is its main use case and the clearest win: point an agent at a task and it downloads the open source repos closest to it, indexes them, and reuses how they solved the problem before writing its own code. In a controlled study that cut a coding agent's output tokens by 2.7x at the same 16/16 solve rate (case study), and people report roughly 5x in everyday work (field reports). It is enough for a…
About arcadedb
Multi Model DBMS Built for Extreme Performance ArcadeDB is a Multi Model DBMS created by Luca Garulli, the same founder of OrientDB, after SAP's acquisition. Written from scratch with a brand new engine made of Alien Technology, ArcadeDB is able to crunch millions of records per second on common hardware with minimal resource usage. ArcadeDB reuses OrientDB's SQL engine (heavily modified) and some utility classes. It's written in LLJ: Low Level Java still Java21+ but only using low level APIs to leverage advanced mechanical sympathy techniques and reduce Garbage Collector pressure. Highly optimized for extreme…
read the full arcadedb overview →
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Frequently asked questions
Is xerj or arcadedb more popular?
xerj has 18,817 GitHub stars and arcadedb has 1,230. xerj has the larger community by that measure.
Are xerj and arcadedb free?
Both are open source. xerj is licensed under Apache-2.0 and arcadedb under Apache-2.0. Neither carries a licence fee.
What is the difference between xerj and arcadedb?
xerj is written in Rust and arcadedb 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, xerj or arcadedb?
Choose xerj if you want the larger community (18,817 stars) or its Apache-2.0 licence terms. Choose arcadedb if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.