Head to head
Weaviate Cloud vs Zilliz Cloud (Milvus)
As a vector database API, Zilliz Cloud (Milvus) rates higher on the APIbenchmarks Index, 85.4 to 79.6, a 5.8-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | Weaviate Cloud | Zilliz Cloud (Milvus) |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 79.6 | 85.4 |
Specifications
| Weaviate Cloud | Zilliz Cloud (Milvus) | |
|---|---|---|
| Best for | Hybrid search + AI-native query agents | Managed Milvus at billion-vector scale |
| Free tier | 14-day sandbox only (auto-expires), no permanent free | 5GB storage + compute credits, permanent free tier |
| Pricing | Usage-based (dimensions + storage) | Per compute-unit-hour + storage |
| Official SDKs | 7 languages | 9 languages |
Is Weaviate Cloud better than Zilliz Cloud (Milvus)?
On the APIbenchmarks Index, Zilliz Cloud (Milvus) rates higher (85.4 vs 79.6). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
Zilliz Cloud (Milvus) leads by 5.8 points (85.4 vs 79.6) and wins 3 of 4 criteria; Weaviate Cloud wins 1.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 84 | 82 | |
| Reliability | 80 | 88 | |
| Ecosystem & SDKs | 80 | 85 | |
| Accessibility | 72 | 88 |
Choose Weaviate Cloud if… / choose Zilliz Cloud (Milvus) if…
- →documentation & dx matters most to you (84 vs 82)
- →your use case matches its focus: hybrid search + ai-native query agents
- →reliability matters most to you (88 vs 80)
- →ecosystem & sdks matters most to you (85 vs 80)
- →accessibility matters most to you (88 vs 72)
- →you need broad SDK coverage (9 official SDKs vs 7)
- →your use case matches its focus: managed milvus at billion-vector scale
Pricing side by side
- Model
- Usage-based (dimensions + storage)
- Free tier
- 14-day sandbox only (auto-expires), no permanent free
- Free / Sandbox$0
- Flexfrom $45/mo
- Premium (Shared)from $400/mo
- Premium Dedicatedfrom $400/mo
- Enterprise / BYOCCustom
- Model
- Per compute-unit-hour + storage
- Free tier
- 5GB storage + compute credits, permanent free tier
- Free (Serverless)$0/month
- ServerlessPay-as-you-go (from ~$0.35/M vCU)
- DedicatedFrom ~$99/month (compute + storage)
- Business Critical (BC)Custom
- BYOC (Bring Your Own Cloud)Custom
Vendor-published pricing, verified 2026-06-27 (Weaviate Cloud) and 2026-06-27 (Zilliz Cloud (Milvus)).
SDK and language coverage
Both · 4
Python (v4 client)GoJava (v6 client)gRPC API
Only Weaviate Cloud · 3
JavaScript / TypeScript (v3 client)GraphQL APIREST API
Only Zilliz Cloud (Milvus) · 5
Node.js / JavaScriptC# (.NET, contributed by Microsoft)C++Rust (in development)RESTful API
Strengths and weaknesses
- +Native hybrid search (HNSW vector + BM25 keyword) with a single query, a standout vs index-only competitors
- +Strong, transparent published ANN benchmarks (e.g. 98.35% recall@10 at ~10,940 QPS on SIFT1M)
- +Built-in vectorizer and generative modules (OpenAI, Cohere, Hugging Face) plus bundled Weaviate Embeddings and Agents
- –Managed cost scales steeply, tens of millions of high-dimensional vectors can run into thousands of dollars per month
- –Pricing model is hard to estimate; metering jargon (vector dimensions, AIUs) makes budgeting difficult, a frequent Reddit/G2 complaint
- –Advanced operations (sharding, schema design, replication tuning) have a steep learning curve for beginners
- +Top-tier benchmark performance: Milvus 2.6 delivers ~4x throughput and 72% memory reduction via RaBitQ quantization while holding ~95% recall, and 3-7x higher QPS than Elasticsearch on full-text workloads
- +Scales to billions of vectors; reviewers report searching millions of vectors in ~200ms
- +Removes the heavy operational burden of self-hosting distributed Milvus (Kubernetes, monitoring, backups, HA)
- –Cost is the most cited complaint, managed pricing can be far more expensive than self-hosting Milvus on a cheap VPS for small/hobby projects
- –vCU / CU-hour + tiered-storage billing model can be hard to forecast and reason about
- –Underlying Milvus has a steep learning curve, especially for distributed/self-hosted setups
Weaviate Cloud vs Zilliz Cloud (Milvus): questions
- Which has better documentation, Weaviate Cloud or Zilliz Cloud (Milvus)?
- Weaviate Cloud scores higher on documentation and developer experience: 84 vs 82 out of 100.
- Which is more reliable, Weaviate Cloud or Zilliz Cloud (Milvus)?
- Zilliz Cloud (Milvus) scores higher on reliability: 88 vs 80 out of 100.
- Do Weaviate Cloud and Zilliz Cloud (Milvus) have a free tier?
- Weaviate Cloud: yes (14-day sandbox only (auto-expires), no permanent free). Zilliz Cloud (Milvus): yes (5GB storage + compute credits, permanent free tier).
- How are Weaviate Cloud and Zilliz Cloud (Milvus) priced?
- Weaviate Cloud: Usage-based (dimensions + storage). Zilliz Cloud (Milvus): Per compute-unit-hour + storage.
- Which has more official SDKs?
- Zilliz Cloud (Milvus) lists 9 official SDKs, Weaviate Cloud lists 7.
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