Milvus vs Weaviate: Which is Better in 2026?
Choosing between Milvus and Weaviate 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.
Bottom line: Weaviate wins this matchup. Our overall Vector Databases pick is Milvus. Our free Vector Databases pick is Milvus. Pick Milvus if you need vector databases.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Milvus
Open-source vector database for AI
Best for you if:
- • You want a fully free tool (Weaviate requires payment)
- • You want high performance
- • You want scalable
Weaviate
Open-source vector database with ML
Best for you if:
- • You want built-in vectorization
- • You want graphQL API
| At a Glance | Milvus | Weaviate |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Vector Databases | Data & Databases |
Rating | 4.8/5 | 4.4/5 |
Free plan | Yes | Yes |
Choose Milvus or Weaviate?
Choose Milvus if
Open-source vector database for AI
- You want a fully free tool (Weaviate requires payment)
- You want high performance
- You want scalable
- Your work is vector databases-shaped, not data & databases-shaped
Choose Weaviate if
Open-source vector database with ML
- You want built-in vectorization
- You want graphQL API
- Budget matters (Free vs Free)
- Your work is data & databases-shaped, not vector databases-shaped
| Feature | Milvus | Weaviate |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | ★4.8/5 310 reviews | ★4.4/5 47 reviews |
| Categories | Vector DatabasesData & Databases | Data & DatabasesVector Databases |
In-Depth Analysis
Milvus
Open-source vector database for AI
Milvus offers a very generous pricing model, especially with its robust open-source option and the Zilliz Cloud Free tier providing 5GB storage and 2.5M vCUs/month at no cost.
Watch out
Overage fees for vCUs on Serverless tier
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
Weaviate
Open-source vector database with ML
Weaviate's pricing is fair, offering a generous free trial and a flexible entry point with the Flex plan at $45/month.
Watch out
Overage fees for exceeding Flex plan limits
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
Pricing: Milvus vs Weaviate
| Plan | Milvus | Weaviate |
|---|---|---|
| Tier 1 | Free Open Source | Free Free Trial |
| Tier 2 | Free Zilliz Cloud Free | $45 Flex |
| Tier 3 | Pay-as-you-go Zilliz Serverless | $400 Premium |
| Tier 4 | $99 Zilliz Dedicated | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Milvus pricing and Weaviate pricing.
Who Should Use What?
On a budget?
Milvus is free. Weaviate is freemium.
Go with: Milvus
Want the highest-rated option?
Milvus: 4.8/5 (310 reviews). Weaviate: 4.4/5 (47 reviews).
Go with: Milvus
Value user reviews?
Milvus: 310 reviews (4.8/5). Weaviate: 47 reviews (4.4/5).
Go with: Milvus
3 Questions to Help You Decide
What's your budget?
Milvus is free. Weaviate is freemium. Go with Milvus if free matters most.
What's your use case?
Milvus is a vector databases tool. Weaviate is in data & databases. Pick the category that matches your needs.
How important are ratings?
Milvus is rated higher: 4.8/5 vs 4.4/5.
Key Takeaways
Weaviate
- Free tier available
- Our pick for this comparison
Milvus
- Completely free
- Higher user rating: 4.8/5 vs 4.4/5
- Larger review base (310 reviews)
- Better fit for vector databases
The Bottom Line
Weaviate wins this matchup. Our overall Vector Databases pick is Milvus. Our free Vector Databases pick is Milvus. That said, Milvus is free, hard to beat on price.
Frequently Asked Questions
Is Milvus or Weaviate better?
Weaviate is rated in our evaluation. Milvus is free and Weaviate is freemium.
What are Milvus and Weaviate used for?
Milvus: Open-source vector database for AI. Weaviate: Open-source vector database with ML.
What does Milvus cost vs Weaviate?
Milvus is completely free. Weaviate is freemium (free tier + paid plans). Visit their websites for detailed pricing.