Milvus vs OpenSearch
A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Milvus
Open-source vector database built for scalable similarity search
VS
OpenSearch
Search and observability suite with logs and dashboards
| Feature | Milvus | OpenSearch |
|---|---|---|
| Category | Search Engines | Monitoring & Status |
| License | Apache-2.0 | Apache-2.0 |
| Language | Go | Java |
| Setup difficulty | Hard | Hard |
| Min. RAM | 4,096 MB | 2,048 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes, helm |
| GitHub stars | ★ 45,556 | ★ 13,480 |
| First released | 2019 | 2021 |
| Replaces | Pinecone, Elasticsearch | Elasticsearch, Splunk |
Why pick each one
Frequently asked questions
Is Milvus or OpenSearch 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 OpenSearch free and open-source?
Yes. Milvus is licensed under Apache-2.0 and OpenSearch under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Milvus and OpenSearch with Docker?
Milvus: yes. OpenSearch: yes.