What is Qdrant?
Qdrant (read: "quadrant") is a high-performance open-source vector database written in Rust. It is purpose-built for AI applications — semantic search, RAG pipelines, recommendation systems, and anomaly detection. Qdrant stands out with its advanced payload filtering, multiple quantization options, and production-ready distributed mode.
Answer-Ready: Qdrant is a Rust-based open-source vector database for AI search. Advanced payload filtering, scalar/binary/product quantization, distributed deployment, and rich SDKs. Used by major AI companies for production RAG. Qdrant Cloud for managed hosting. 22k+ GitHub stars.
Best for: AI teams building production search and RAG systems. Works with: OpenAI, Cohere, HuggingFace embeddings, LangChain, LlamaIndex. Setup time: Under 2 minutes.
Core Features
1. Advanced Filtering
from qdrant_client.models import Filter, FieldCondition, MatchValue
results = client.query_points(
collection_name="docs",
query=[0.15, 0.25, ...],
query_filter=Filter(
must=[
FieldCondition(key="category", match=MatchValue(value="ai")),
FieldCondition(key="year", range={"gte": 2024}),
]
),
limit=10,
)2. Quantization (Memory Savings)
| Method | Memory | Accuracy | Speed |
|---|---|---|---|
| None (float32) | 100% | 100% | Baseline |
| Scalar (int8) | 25% | 99%+ | Faster |
| Binary | 3% | 95%+ | Fastest |
| Product | 5-10% | 97%+ | Fast |
3. Sparse Vectors (Hybrid Search)
from qdrant_client.models import SparseVector
# Combine dense + sparse for hybrid search
client.upsert(
collection_name="docs",
points=[PointStruct(
id=1,
vector={"dense": [0.1, 0.2, ...], "sparse": SparseVector(indices=[1, 5, 100], values=[0.5, 0.3, 0.8])},
payload={"title": "Doc A"},
)],
)4. Distributed Mode
# Multi-node cluster
storage:
shard_number: 6
replication_factor: 25. Multiple SDKs
| Language | Package |
|---|---|
| Python | qdrant-client |
| JavaScript | @qdrant/js-client-rest |
| Rust | qdrant-client |
| Go | go.qdrant.io/client |
| Java | io.qdrant:client |
Qdrant vs Alternatives
| Feature | Qdrant | Pinecone | Weaviate | Milvus |
|---|---|---|---|---|
| Open source | Yes | No | Yes | Yes |
| Language | Rust | - | Go | Go/C++ |
| Filtering | Advanced | Basic | GraphQL | Basic |
| Quantization | 3 methods | Limited | Limited | Yes |
| Managed cloud | Yes | Yes | Yes | Yes |
FAQ
Q: How does it scale? A: Distributed mode with sharding and replication. Handles billions of vectors across multiple nodes.
Q: Is there a managed version? A: Yes, Qdrant Cloud offers managed hosting with a free tier (1GB).
Q: Can I run it embedded (no server)?
A: Yes, QdrantClient(":memory:") or QdrantClient(path="./db") for local file storage.