Fess vs Milvus
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Fess
Powerful enterprise search server easy to deploy
VS
Milvus
Open-source vector database built for scalable similarity search
| Feature | Fess | Milvus |
|---|---|---|
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | Go |
| Setup difficulty | Medium | Hard |
| Min. RAM | 2,048 MB | 4,096 MB |
| Deployment | docker, binary | docker, kubernetes, helm |
| GitHub stars | ★ 1,124 | ★ 45,556 |
| First released | 2009 | 2019 |
| Replaces | Google Search Appliance | Pinecone, Elasticsearch |
Why pick each one
Choose Fess if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Active community (1.1k GitHub stars)
- Written in Java
Frequently asked questions
Is Fess or Milvus better?
Neither is universally better. Milvus has the larger community, while Fess is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Fess and Milvus free and open-source?
Yes. Fess is licensed under Apache-2.0 and Milvus under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Fess and Milvus with Docker?
Fess: yes. Milvus: yes.