Milvus vs RediSearch
A side-by-side comparison of two self-hosted search engines options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Milvus | RediSearch |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 100 · Excellent | 90 · Excellent |
| Category | Search Engines | Search Engines |
| License | Apache-2.0 | RSALv2 |
| Language | Go | Rust |
| Setup difficulty | Hard | Medium |
| Min. RAM | 4,096 MB | 512 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, binary |
| GitHub stars | ★ 46,245 | ★ 6,242 |
| First released | 2019 | 2017 |
| Replaces | Pinecone, Elasticsearch | Elasticsearch, Algolia |
What are Milvus and RediSearch?
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
RediSearch
RediSearch, part of the Redis Query Engine, adds full-text search, secondary indexing and vector search capabilities to Redis. It enables fast querying over data already stored in Redis.
- Full-text search inside Redis
- Secondary indexing of Redis data
- Vector similarity search
- Aggregations and queries
Milvus vs RediSearch: key differences
Milvus is written in Go, while RediSearch is built with Rust. Licensing differs — Apache-2.0 for Milvus versus RSALv2 for RediSearch. RediSearch is the lighter option, starting around 512 MB of RAM against 4,096 MB for Milvus. RediSearch 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 6,242.
Why pick each one
Choose Milvus if…
- Scales to massive datasets
- Mature vector ecosystem
Watch out for
- Complex distributed deployment
Choose RediSearch if…
- Very fast, in-memory
- Reuses existing Redis
Watch out for
- Source-available, not OSI licensed
Frequently asked questions
Is Milvus or RediSearch better?
Neither is universally better. Milvus has the larger community, while RediSearch is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Milvus and RediSearch free and open-source?
Yes. Milvus is licensed under Apache-2.0 and RediSearch under RSALv2. Both can be self-hosted at no software cost.
Can I run Milvus and RediSearch with Docker?
Milvus: yes. RediSearch: yes.
Which is lighter on resources, Milvus or RediSearch?
RediSearch has the smaller minimum footprint at 512 MB of RAM, compared to about 4,096 MB for Milvus. Real-world usage depends on library size, user count, and enabled features.