Vespa

Powers real-time AI-driven search and recommendation at scale. Vespa is the AI Search Platform for fast, accurate AI search, AI agents, personalization, recommendations, and retrieval. Vespa powers real-time AI applications like search, recommendations, and RAG for large-scale data. Vespa is open-source under the Apache 2.0 license, with a managed Vespa Cloud option. Vespa supports vector, text, and structured data, combinable in hybrid queries. Vespa excels in AI-driven tasks with tensor support, while Elasticsearch is better for aggregations. Vespa manages continuous data changes without impacting query performance. It optimizes cost for personal data searches by bypassing traditional indexing.