Lunr.js vs Milvus
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Lunr.js | Milvus |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 29 · At risk | 100 · Excellent |
| Category | Search Engines | Search Engines |
| License | MIT | Apache-2.0 |
| Language | JavaScript | Go |
| Setup difficulty | Easy | Hard |
| Min. RAM | 64 MB | 4,096 MB |
| Deployment | source | docker, kubernetes, helm |
| GitHub stars | ★ 9,203 | ★ 46,245 |
| First released | 2013 | 2019 |
| Replaces | Algolia, Elasticsearch | Pinecone, Elasticsearch |
What are Lunr.js and Milvus?
Lunr.js
Lunr.js is a small, full-text search library for use in the browser that provides a simple search index without needing a backend service. It is commonly used to add offline search to static sites and documentation.
- Browser-based search
- No backend needed
- Prebuilt index support
- Tiny library size
Milvus
Milvus is an open-source vector database designed for scalable similarity search and AI applications. It can manage billions of vectors and supports semantic search and recommendation use cases.
- Billion-scale vector search
- Multiple index types
- Cloud-native distributed architecture
- Hybrid search support
Lunr.js vs Milvus: key differences
Lunr.js is written in JavaScript, while Milvus is built with Go. Licensing differs — MIT for Lunr.js versus Apache-2.0 for Milvus. Lunr.js is the lighter option, starting around 64 MB of RAM against 4,096 MB for Milvus. Lunr.js is the more established project (first released 2013), while Milvus arrived in 2019. Milvus has the considerably larger community, at 46,245 GitHub stars versus 9,203. Milvus lists first-class Docker deployment; Lunr.js does not.
Why pick each one
Choose Lunr.js if…
- Released under the MIT license
- Easy to set up — beginner-friendly
- Mature project with 9.2k GitHub stars
- Written in JavaScript
Choose Milvus if…
- Scales to massive datasets
- Mature vector ecosystem
Watch out for
- Complex distributed deployment
Frequently asked questions
Is Lunr.js or Milvus better?
Neither is universally better. Milvus has the larger community, while Lunr.js is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Lunr.js and Milvus free and open-source?
Yes. Lunr.js is licensed under MIT and Milvus under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Lunr.js and Milvus with Docker?
Lunr.js: check the project docs for container support. Milvus: yes.
Which is lighter on resources, Lunr.js or Milvus?
Lunr.js has the smaller minimum footprint at 64 MB of RAM, compared to about 4,096 MB for Milvus. Real-world usage depends on library size, user count, and enabled features.