Vespa

Vespa is an open-source search and big data serving engine that helps businesses build AI-powered recommendation systems, semantic search, and personalization platforms. It provides real-time indexing, vector search, and large-scale data retrieval that simplify working with structured and unstructured data. Designed for enterprises, developers, and research teams, the platform reduces the complexity of deploying scalable search applications without requiring extensive infrastructure expertise.

They offer hybrid search (keyword + vector), real-time recommendation pipelines, streaming ingestion, and integrations with ML frameworks like TensorFlow and PyTorch, alongside features for multi-tenant support, cloud-native deployment, and enterprise-grade scalability. Vespa also supports secure APIs, distributed clustering, and compliance certifications. These capabilities help organizations deliver personalized search, recommendation engines, and AI-driven content ranking at scale.

And the best part? Vespa provides a free open-source edition with core search and recommendation features, while paid enterprise support plans (starting at $62/month) unlock managed hosting, advanced scalability, and dedicated engineering support. Businesses can choose a plan that best fits their AI search and personalization requirements.