OpenSearch Vector Search

Lucene KNN vector plugin for Elasticsearch search engine, enabling hybrid lexical+vector search, BM25 fusion, HNSW/IVF indexes for ANN. Used for enterprise search, RAG, multimodal apps. Integrated vs standalone like Weaviate: superior hybrid text handling but higher resource footprint.

Vector search extension for Meilisearch engine, supporting hybrid lexical+vector search with BM25 fusion, k-NN similarity. Ideal for enterprise semantic search, RAG, and recommendations. Integrated vs standalone like Weaviate: developer-friendly with typo-tolerant full-text but lighter scale for massive vectors.

Vector search plugin for Azure Cache for Redis via RediSearch module, supporting HNSW/Flat indexes, hybrid lexical+vector with BM25 fusion, metadata filtering. Suited for enterprise semantic caching, real-time RAG, and recommendations. Integrated caching layer provides sub-ms latency vs standalone vector DBs like Weaviate.

GPU-accelerated platform from VAST Data that includes a native vector database, designed for enterprise AI workloads including multi-agent systems, video-reasoning, and high-volume RAG. It combines vector embeddings with structured data and metadata in unified tables, enabling hybrid queries across modalities without orchestration layers or external indexes.

Hybrid database-inference engine that converts documents to tensors via LLM forward pass, storing in a KV cache for optimized retrieval. Features integrated storage and inference with advanced indexing for fast context retrieval in RAG pipelines. Suited for LLM applications and semantic search; differs from Milvus by embedding inference, more specialized than Qdrant's pure vector storage.

VLDB 2022 paper introducing Manu, a cloud-native vector database management system designed for scalable similarity search in cloud environments with separated storage and compute architecture.