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Qdrant

Free tier

High-performance vector search engine built for production-grade AI retrieval at any scale

Free tier available·Technical·API available·Open source

Key strengths

Built entirely in Rust with SIMD for high performanceNative hybrid search (dense + sparse vectors, BM25, SPLADE++)Efficient one-stage filtering during HNSW traversalAdvanced quantization (scalar, binary, asymmetric) reducing memory up to 64xMultiple deployment models: cloud, hybrid cloud, private cloud, edgeReal-time indexing without full index rebuildsSOC2 & HIPAA compliant
Free tier + paid plans
San Francisco, USA
Founded 2020
Self-hostable

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Recent changes

  • Plans updated: Free tier: 0.5 vCPU / 1GB RAM / 4GB Disk, free forever. Standard tier: usage-based pricing (charged for vCPU, memory GB, storage GB). Premium tier: minimum spend required. Hybrid Cloud and Private Cloud available for enterprise.
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Technical Use Cases

Qdrant is purpose-built for AI/ML engineers and developers working on:

  • RAG Pipelines (Retrieval-Augmented Generation): Store and retrieve document chunk embeddings with hybrid search (dense + BM25/SPLADE++) to feed accurate context into LLMs. One-stage HNSW filtering ensures metadata constraints (e.g., date range, tenant ID) don't degrade recall.

  • AI Agents & Tool Memory: Provide agents with fast, semantically relevant memory retrieval at low latency, backed by real-time indexing so newly ingested data is immediately searchable.

  • Semantic Search: Replace or augment keyword search with vector similarity across text, images, or multimodal embeddings. Hybrid search merges lexical and semantic signals in a single query.

  • Recommendation Systems: Use vector proximity to surface similar items (products, content, users) with payload filtering to enforce business rules without sacrificing performance.

  • Large-Scale Deployments: Leverage quantization (up to 64× memory reduction) and Kubernetes-native deployment (with Terraform/Pulumi IaC) to run cost-efficiently at billions of vectors.

  • Regulated / Enterprise Workloads: SOC2 & HIPAA compliance, Private Cloud, and Hybrid Cloud deployment models satisfy strict data-residency and security requirements.

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