Open-source AI search platform combining vector search, keyword retrieval, structured filtering, and ML ranking. Powers applications at Spotify, Yahoo, and Wix with sub-100ms response times. This is an OSS platform under Apache 2.0 with managed cloud option.
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Solr is a mature open-source search engine that has incorporated vector search capabilities, making it relevant for enterprises looking to implement vector-based search alongside traditional keyword search.
Qdrant is an open‑source vector database designed for high‑performance similarity search and AI applications such as RAG, recommendation systems, advanced semantic search, anomaly detection, and AI agents. It provides scalable storage and retrieval of vector embeddings with features like filtering, hybrid search, and production‑grade APIs for integrating with machine learning workloads.
Datastax offers a vector search solution integrated with its database platform, enabling approximate similarity search and hybrid queries for enterprise use cases.
Elasticsearch is a distributed search engine supporting various data types, including vectors, and provides scalable vector search capabilities, making it a popular choice for modern AI-powered applications. It can be extended with the k-NN plugin to provide scalable vector search using HNSW and Lucene, enabling hybrid semantic and keyword search capabilities.
Oracle's core database now includes vector search capabilities, enabling enterprises to perform scalable vector queries natively as part of their data management workflows. Oracle includes vector search capabilities in its database platform, supporting approximate KNN and hybrid search for enterprise-scale use cases.
Orama is a lightweight search engine that supports vector and hybrid search functionalities, suitable for browser, server, or edge environments.
Vespa is a fully open-source AI search platform for developing and operating large-scale applications that combine big data, vector search, machine-learned ranking, and real-time inference. Used by major enterprises including Spotify, Yahoo, and Wix.
Free under Apache 2.0 license. No licensing costs.
Usage-based pricing:
Detailed pricing at: vespa.ai/pricing