Milvus vs Vespa
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Milvus | Vespa |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 100 · Excellent | 91 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Java |
| Setup difficulty | Hard | Hard |
| Min. RAM | 4,096 MB | 4,096 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, bare-metal |
| GitHub stars | ★ 46,245 | ★ 7,109 |
| First released | 2019 | 2017 |
| Replaces | Pinecone, Elasticsearch | Elasticsearch, Algolia |
What are Milvus and Vespa?
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
Vespa
Vespa is an open-source platform for low-latency computation over large data sets, powering search, recommendation and AI applications. It combines storing, searching, ranking and organizing data.
- Combined search and ML ranking
- Vector and tensor computation
- Real-time indexing at scale
- Used for large recommendation systems
Milvus vs Vespa: key differences
Milvus is written in Go, while Vespa is built with Java. Vespa is the more established project (first released 2017), while Milvus arrived in 2019. Milvus has the considerably larger community, at 46,245 GitHub stars versus 7,109.
Why pick each one
Choose Milvus if…
- Scales to massive datasets
- Mature vector ecosystem
Watch out for
- Complex distributed deployment
Choose Vespa if…
- Extremely powerful and scalable
- Built-in ML ranking
Watch out for
- Steep learning curve
- Heavy resource needs
Frequently asked questions
Is Milvus or Vespa better?
Neither is universally better. Milvus has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Milvus and Vespa free and open-source?
Yes. Milvus is licensed under Apache-2.0 and Vespa under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Milvus and Vespa with Docker?
Milvus: yes. Vespa: yes.