Alternatives to Vespa

Vald

AI Search Engines

Open-source distributed vector search engine for billion-scale approximate nearest neighbor search.

Weaviate

Vector Databases

Weaviate is an open-source, AI-native vector database that provides vector search, hybrid search, and generative search capabilities for building context-aware AI applications at scale.

Milvus

Vector Databases

Open-source vector database by Zilliz designed for billion-scale similarity search with GPU acceleration.

Manticoresearch

Vector Databases

Open source search engine for full-text search and analytics that serves as a lightweight Elasticsearch alternative.

Lantern DB

Vector Databases

Open-source PostgreSQL vector search extension providing fast similarity search with HNSW indexing.

Kdb.ai

Vector Databases

Vector database by KX Systems combining time-series data capabilities with vector search for AI applications.

Turbopuffer

Vector Databases

Turbopuffer is a retrieval and vector database platform designed for high-scale search, embeddings, and AI application data access patterns.

Redis

Vector Databases

Redis provides in-memory data storage with real-time performance for caching, session management, streaming, and AI vector search as a managed cloud service or self-managed software.

Vearch

Vector Databases

Open-source cloud-native vector database for deep learning and embedding similarity search.

Infinispan

Vector Databases

Open source in-memory data grid by Red Hat providing distributed caching with Kubernetes operator support.