Weaviate vs Milvus: Which is Better in 2026?
Choosing between Weaviate and Milvus comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Weaviate
Open-source vector database with ML
Best for you if:
- • You need data & databases features specifically
- • Open-source vector database
- • Run locally or in the cloud
Milvus
Open-source vector database for AI
Best for you if:
- • You need something completely free
- • You need vector databases features specifically
- • Milvus is an open-source vector database for AI similarity search
- • It handles billion-scale vector search for recommendation and AI applications
| At a Glance |  Weaviate |  Milvus |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Data & Databases | Vector Databases |
Rating | 4.6/5 | 4.7/5 |
Choose Weaviate or Milvus?
Choose Weaviate if
Open-source vector database with ML
- Built-in vectorization
- GraphQL API
- Hybrid search
- Budget matters (Free vs Free)
- Your work is data & databases-shaped, not vector databases-shaped
Choose Milvus if
Open-source vector database for AI
- High performance
- Scalable
- Open source
- You want a fully free tool (Weaviate requires payment)
- Your work is vector databases-shaped, not data & databases-shaped
| Feature | Weaviate | Milvus |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.6/5 29 reviews | ★4.7/5 11 reviews |
| Categories | Data & DatabasesVector Databases | Vector DatabasesData & Databases |
In-Depth Analysis
Weaviate
Open-source vector database with ML
Strengths
- +Built-in vectorization
- +GraphQL API
- +Hybrid search
- +Good documentation
- +Open source
Weaknesses
- -Learning curve
- -Memory intensive
- -Self-hosting complex
- -Cloud pricing high
- -Less mature than Pinecone
Key features
Milvus
Open-source vector database for AI
Strengths
- +High performance
- +Scalable
- +Open source
- +Good for large scale
- +Active development
Weaknesses
- -Complex operations
- -Heavy resource usage
- -Learning curve
- -Kubernetes recommended
- -Documentation dense
Key features
Pricing: Weaviate vs Milvus
| Plan | Weaviate | Milvus |
|---|---|---|
| Tier 1 | Free Free Trial | Free Open Source |
| Tier 2 | $45 Flex | Free Zilliz Cloud Free |
| Tier 3 | $400 Premium | Pay-as-you-go Zilliz Serverless |
| Tier 4 | N/A | $99 Zilliz Dedicated |
Pricing verified from each vendor's public pricing page. Compare in detail on Weaviate pricing and Milvus pricing.
Who Should Use What?
On a budget?
Milvus is free. Weaviate is freemium.
Go with: Milvus
Want the highest-rated option?
Weaviate: 4.6/5 (29 reviews). Milvus: 4.7/5 (11 reviews).
Go with: Milvus
Value user reviews?
Weaviate: 29 reviews (4.6/5). Milvus: 11 reviews (4.7/5).
Go with: Weaviate
3 Questions to Help You Decide
What's your budget?
Weaviate is freemium. Milvus is free. Go with Milvus if free matters most.
What's your use case?
Weaviate is a data & databases tool. Milvus is in vector databases. Pick the category that matches your needs.
How important are ratings?
Milvus is rated higher: 4.7/5 vs 4.6/5.
Key Takeaways
Weaviate
- Larger review base (29 reviews)
- Free tier available
- Our pick for this comparison
Milvus
- Completely free
- Higher user rating: 4.7/5 vs 4.6/5
- Better fit for vector databases
The Bottom Line
Weaviate is our pick. That said, Milvus is free, hard to beat on price.
Frequently Asked Questions
Is Weaviate or Milvus better?
Weaviate is rated in our evaluation. Weaviate is freemium and Milvus is free.
What are Weaviate and Milvus used for?
Weaviate: Open-source vector database with ML. Milvus: Open-source vector database for AI.
What does Weaviate cost vs Milvus?
Weaviate is freemium (free tier + paid plans). Milvus is completely free. Visit their websites for detailed pricing.