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Running AI at scale

Vespa

A platform for large-scale AI search and recommendations over text, vectors and structured data.

New this week

What it does

Vespa is a search platform built for very large amounts of data. It can search text, compare items by meaning using vectors (number lists AI uses to capture meaning), and run machine-learning models on results, all in a fraction of a second.

It is used for search, recommendations and personalization, and for feeding relevant information to AI assistants. You can run it yourself or use the makers' cloud service, which offers a free trial.

Who it's for

Engineering teams building large search, recommendation or AI retrieval systems.

Can I use it without coding?

Developers only. It is server software that needs engineering work to set up and use. New to this? Start here.

Can I run it?

Cost
Free, with optional paid extrasThe open-source version is free; the makers also sell a hosted or pro version.
Runs on
Server, Cloud
Computer
Made for servers or data centres
Privacy
Your choice: run it on your device or use an online service
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it