# Jon Bratseth

> Jon Bratseth is founder and CEO; architect and main contributor. Vespa on Anchor Terminal, with grades, an about and public profiles.

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- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Founder and CEO; architect and main contributor.

Jon Bratseth is a founder and the CEO of Vespa.ai, which Yahoo spun out as an independent company in 2023. He is the architect of Vespa and one of its main contributors, with more than 20 years as an architect and programmer on large distributed systems.

- LinkedIn: https://www.linkedin.com/in/jon-bratseth-6a6585/

## What Jon builds

- [Vespa](https://www.anchorterminal.com/tools/vespa.md), graded BB, 70/100, in Retrieval & vector search. Vespa is an open-source search engine from Vespa.ai AS for vector, text and hybrid retrieval with ranking, run self-hosted or on Vespa Cloud. Agents reach it through HTTP query and document APIs, the Vespa CLI and a Python client. Founder and CEO; architect and main contributor, researched 2026-10-26.

## Works with

- [Frode Lundgren](https://www.anchorterminal.com/people/frode-lundgren/), Founder and CTO
- [Kim O. Johansen](https://www.anchorterminal.com/people/kim-o-johansen/), Co-founder, Vespa.ai AS
- [Kim Omar Johansen](https://www.anchorterminal.com/people/kim-omar-johansen/), Founder and COO; board chair
- [Kristian Aune](https://www.anchorterminal.com/people/kristian-aune/), Founder and Head of Customer Success

## Backed by

- [Blossom Capital](https://www.anchorterminal.com/investors/blossom-capital/)
- [Yahoo](https://www.anchorterminal.com/investors/yahoo/)

## Questions

### Who is Jon Bratseth?

Jon Bratseth is a founder and the CEO of Vespa.ai, which Yahoo spun out as an independent company in 2023. He is the architect of Vespa and one of its main contributors, with more than 20 years as an architect and programmer on large distributed systems.

### What does Vespa.ai AS make?

Anchor Terminal lists Vespa from Vespa.ai AS. Vespa is an open-source search engine from Vespa.ai AS for vector, text and hybrid retrieval with ranking, run self-hosted or on Vespa Cloud. Agents reach it through HTTP query and document APIs, the Vespa CLI and a Python client.

### Who has invested in Vespa.ai AS?

The sources our research read name Blossom Capital and Yahoo.

### How are Jon's tools graded?

Vespa is graded BB, 70 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://vespa.ai/company/
- https://www.linkedin.com/in/jon-bratseth-6a6585/
- https://www.linkedin.com/in/kimomar/
- https://www.linkedin.com/in/frodelu/
- https://www.linkedin.com/in/kraune/
- https://vespa.ai/
- https://vespa.ai/support/
- https://vespa.ai/get-in-touch/

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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