Vespa.ai

Vespa.ai is a battle-tested big-data serving engine that combines vector search, tensor computation, lexical search, and structured filtering in a single platform built for very large scale. It was developed inside Yahoo more than two decades ago to power search, recommendations, and personalisation across billions of documents in real time, and spun out as an independent company in 2023.

Headquartered in Trondheim, Norway, Vespa is aimed at the most demanding production workloads — retrieval-augmented generation, recommendation, ad targeting, and hybrid search where latency and scale are critical — applying machine-learned ranking to data at serving time. In November 2023 the company raised a $31 million Series A led by Blossom Capital.

Choose Vespa when you need a single engine that unifies vector, text, and structured retrieval with sophisticated ranking at internet scale.