bleve 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 | bleve | Milvus |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 93 · Excellent | 100 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Go |
| Setup difficulty | Medium | Hard |
| Min. RAM | 128 MB | 4,096 MB |
| Deployment | source, binary | docker, kubernetes, helm |
| GitHub stars | ★ 11,228 | ★ 46,245 |
| First released | 2014 | 2019 |
| Replaces | Elasticsearch, Algolia | Pinecone, Elasticsearch |
What are bleve and Milvus?
bleve
An embeddable modern full-text search and indexing library that lets developers add search to applications without running a separate server. It supports analyzers, faceting, and scoring out of the box.
- Embeddable index
- Text analyzers
- Faceted search
- Pluggable storage
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
bleve vs Milvus: key differences
Both projects are written in Go. Bleve is the lighter option, starting around 128 MB of RAM against 4,096 MB for Milvus. Bleve is the more established project (first released 2014), while Milvus arrived in 2019. Milvus has the considerably larger community, at 46,245 GitHub stars versus 11,228. Milvus lists first-class Docker deployment; bleve does not.
Why pick each one
Choose bleve if…
- No separate server
- Pure Go integration
Watch out for
- Library not turnkey app
- Manual scaling
Choose Milvus if…
- Scales to massive datasets
- Mature vector ecosystem
Watch out for
- Complex distributed deployment
Frequently asked questions
Is bleve or Milvus better?
Neither is universally better. Milvus has the larger community, while bleve is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are bleve and Milvus free and open-source?
Yes. bleve is licensed under Apache-2.0 and Milvus under Apache-2.0. Both can be self-hosted at no software cost.
Can I run bleve and Milvus with Docker?
bleve: check the project docs for container support. Milvus: yes.
Which is lighter on resources, bleve or Milvus?
bleve has the smaller minimum footprint at 128 MB of RAM, compared to about 4,096 MB for Milvus. Real-world usage depends on library size, user count, and enabled features.