head to head · open source
xerj vs VectorDBBench
xerj has 18,817 GitHub stars, 1,435 forks, 16 open issues and last shipped yesterday. VectorDBBench has 1,199 stars, 450 forks, 184 open issues and last shipped 5 days ago. xerj leads on adoption by 1,469% (18,817 vs 1,199 stars). xerj is written in Rust under Apache-2.0; VectorDBBench is written in Python under MIT. xerj has attracted 8% as many forks as stars, VectorDBBench 38%. xerj 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
| xerj | VectorDBBench | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 1.2K |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 1.4K | ⑂ 450 |
| 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 VectorDBBench if
- You want the VectorDBBench feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and VectorDBBench 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 VectorDBBench
VectorDBBench(VDBBench): A Benchmark Tool for VectorDB What is VDBBench VDBBench is not just an offering of benchmark results for mainstream vector databases and cloud services, it's your go to tool for the ultimate performance and cost effectiveness comparison. Designed with ease of use in mind, VDBBench is devised to help users, even non professionals, reproduce results or test new systems, making the hunt for the optimal choice amongst a plethora of cloud services and open source vector databases a breeze. Understanding the importance of user experience, we provide an intuitive visual interface. This not only…
read the full VectorDBBench overview →
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Frequently asked questions
Is xerj or VectorDBBench more popular?
xerj has 18,817 GitHub stars and VectorDBBench has 1,199. xerj has the larger community by that measure.
Are xerj and VectorDBBench free?
Both are open source. xerj is licensed under Apache-2.0 and VectorDBBench under MIT. Neither carries a licence fee.
What is the difference between xerj and VectorDBBench?
xerj is written in Rust and VectorDBBench in Python. 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 VectorDBBench?
Choose xerj if you want the larger community (18,817 stars) or its Apache-2.0 licence terms. Choose VectorDBBench if its feature set, stack or MIT licence fits better. Both are self-hostable.