Vespa

Free tier

AI Search Platform for large-scale vector search, ranking, and real-time inference

Free tier available·Technical·API available·Open source

Key strengths

Vector, text and structured searchDistributed machine-learned rankingUnbeatable performanceInfinite automated scalabilityContinuous deployment & upgradesFully managed, with strong security

Free tier + paid plans

Oslo, Norway

Founded 2017

Self-hostable

Facts verified against vespa.ai on Oct 22, 2026

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Vespa.ai is an open-source AI search platform built for developers and engineering teams who need to run vector, text, and structured search at scale — with distributed machine-learned ranking baked in. Self-hostable or fully managed, Vespa supports continuous deployment and upgrades with no downtime, and delivers automated horizontal scalability to handle production workloads without manual intervention. With 7,140+ GitHub stars, it is a proven foundation for building search, RAG, recommendation, and AI-powered applications. Integrations include AWS and Slack.

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