head to head · open source
xerj vs lancedb
xerj has 18,817 GitHub stars, 1,435 forks, 16 open issues and last shipped yesterday. lancedb has 11,832 stars, 1,150 forks, 627 open issues and last shipped yesterday. xerj leads on adoption by 59% (18,817 vs 11,832 stars). xerj is written in Rust under Apache-2.0; lancedb is written in Rust under Apache-2.0. xerj has attracted 8% as many forks as stars, lancedb 10%. 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 | lancedb | |
|---|---|---|
| GitHub stars | ★ 19K | ★ 12K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | Rust | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 1.4K | ⑂ 1.1K |
| 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 lancedb if
- You want the lancedb feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and lancedb 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 lancedb
The Multimodal AI Lakehouse How to Install ✦ Detailed Documentation ✦ Tutorials and Recipes ✦ Contributors The ultimate multimodal data platform for AI/ML applications. LanceDB is designed for fast, scalable, and production ready vector search. It is built on top of the Lance columnar format. You can store, index, and search over petabytes of multimodal data and vectors with ease. LanceDB is a central location where developers can build, train and analyze their AI workloads. Demo: Multimodal Search by Keyword, Vector or with SQL Star LanceDB to get updates! ⭐ Click here ⭐ to see how fast we're growing! Key…
read the full lancedb overview →
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Frequently asked questions
Is xerj or lancedb more popular?
xerj has 18,817 GitHub stars and lancedb has 11,832. xerj has the larger community by that measure.
Are xerj and lancedb free?
Both are open source. xerj is licensed under Apache-2.0 and lancedb under Apache-2.0. Neither carries a licence fee.
What is the difference between xerj and lancedb?
xerj is written in Rust and lancedb in Rust. 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 lancedb?
Choose xerj if you want the larger community (18,817 stars) or its Apache-2.0 licence terms. Choose lancedb if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.