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vespa
Java

vespa

The AI search platform

by vespa-engine · GitHub
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aibig-datajavaApache-2.0Java/C++
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In plain words

Vespa is a production engine combining vector search, lexical search and ML-model ranking over billions of documents with real-time writes — the platform behind major web-scale services.

From the README

Install
brew install jenv mvnvm openjdk@17
Documentation ↗

Excerpts from the project README on GitHub. Copyright and licensing remain with the respective authors.

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📈 Star history
7.02k6.99k
2026-07-042026-08-31
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📄 About

The AI search platform

vespa has 7k stars on GitHub. It has been forked 723 times. vespa is written mainly in Java/C++. It has been in active development since 2016. vespa is available under the Apache-2.0 license. Its main topics are ai, big-data, java, machine-learning.

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Frequently asked questions

What is vespa?

The AI search platform

Is vespa open source?

vespa is an open-source project. It is released under the Apache-2.0 license.

Is vespa free?

Yes. vespa is free and open source — you can use, modify and self-host it.

What license does vespa use?

vespa is available under the Apache-2.0 license.

What language is vespa written in?

vespa is written mainly in Java/C++.

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