Zilliz vs Weaviate: Which is Better in 2026?
Choosing between Zilliz 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. PostgreSQL is our overall Data & Databases pick. PostgreSQL is our free Data & Databases pick. Pick Zilliz if you need a free tier to start with.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Zilliz
Cloud vector database for similarity search
Best for you if:
- • You want managed Milvus
Weaviate
Open-source vector database with ML
Best for you if:
- • You want built-in vectorization
| At a Glance | Zilliz | Weaviate |
|---|---|---|
Starts at | Free Free plan | Free Free plan |
Category | Data & Databases Cloud & Infrastructure | Data & Databases Vector Databases |
Rating | 4.7/5 G2 4.7 53 reviews | 4.4/5 G2 4.4 47 reviews |
Free plan | Yes | Yes |
Watch out for | Overage fees for exceeding storage limits | Overage fees for exceeding Flex plan limits |
Choose Zilliz or Weaviate?
Choose Zilliz if
- You want managed Milvus
- You want good for vectors
Choose Weaviate if
- You want built-in vectorization
- You want GraphQL API
In-Depth Analysis
Zilliz
Cloud vector database for similarity search
Zilliz's pricing is fair, offering a generous free tier for initial exploration.
Watch out
Overage fees for exceeding storage limits
Strengths
- Pro: Managed Milvus
- Pro: Good for vectors
- Pro: Active development
- Pro: Good performance
- Pro: Enterprise ready
Weaknesses
- Con: Expensive
- Con: Learning curve
- Con: Vendor lock-in
- Con: Feature gaps
- Con: Per-CU pricing
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
- Pro: Built-in vectorization
- Pro: GraphQL API
- Pro: Hybrid search
- Pro: Good documentation
- Pro: Open source
Weaknesses
- Con: Learning curve
- Con: Memory intensive
- Con: Self-hosting complex
- Con: Cloud pricing high
- Con: Less mature than Pinecone
Key features
Pricing: Zilliz vs Weaviate
| Plan | Zilliz | Weaviate |
|---|---|---|
| Tier 1 | N/A | Free Free Trial |
| Tier 2 | N/A | $45 Flex |
| Tier 3 | N/A | $400 Premium |
Pricing verified from each vendor's public pricing page. Compare in detail on Zilliz pricing and Weaviate pricing.
Key Takeaways
Weaviate
- Free tier available
- Our pick for this comparison
Zilliz
- Higher user rating: 4.7/5 vs 4.4/5
- Larger review base (53 reviews)
The Bottom Line
Weaviate wins this matchup. PostgreSQL is our overall Data & Databases pick. PostgreSQL is our free Data & Databases pick.
Frequently Asked Questions
Is Zilliz or Weaviate better in 2026?
Weaviate wins this matchup. PostgreSQL is our overall Data & Databases pick. PostgreSQL is our free Data & Databases pick. Pick Zilliz for data & databases workflows (main strength: managed Milvus). Pick Weaviate for data & databases workflows (main strength: built-in vectorization).
What are Zilliz and Weaviate used for?
Zilliz: Cloud vector database for similarity search. Weaviate: Open-source vector database with ML.
What does Zilliz cost vs Weaviate?
Zilliz pricing is on their site. Weaviate's paid plans start at Free (Flex).
What's the main difference between Zilliz and Weaviate?
Zilliz's main strength: managed Milvus. Weaviate's main strength: built-in vectorization.