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Onyx

AcquiredYC W24

San Francisco, US · Founded 2023 · 20 employees · 9 known investors

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Onyx is an open-source application platform for large language models that enables teams to leverage any LLM while maintaining data transparency and customization. The platform integrates internet search, internal knowledge connectors, code execution, and model context protocol integrations to provide enterprise and startup teams with flexible AI deployment options.

Also known as DanswerAI, Inc. · Danswer

AI & Machine LearningDeveloper ToolsEnterprise SoftwareFuture of WorkSaaSOpen SourceNLPEnterpriseSearchAIUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W24)

Onyx was founded in 2023 by Yuhong Sun and Chris Weaver.

YSYuhong Sun
Yuhong SunCo-FounderYuhong Sun worked on machine learning and NLP applications, including transformer architectures for natural language-to-SQL and hybrid search systems, at Alation.
CWChris Weaver
Chris WeaverCo-FounderChris Weaver was a top competitive League of Legends player in North America and previously worked as a team lead at Robinhood.
AA
Asaf Avidan AntonirFounder
GE
Gil ElbazFounder
JS
James ShaFounder
MB
Maxim Bar KoganFounder
CA
Careers atRecruiter
DC
Dhruv ChaudhariChief of Staff
JR
Joachim RahmfeldHead of AI
TM
Thomas MuhnFounding Recruiter

Investors · 9

First Round Capital✓ confirmed by OnyxSan Francisco · $100K – $20M

How we know: the company's own site · businessinsider.com · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

Khosla Ventures✓ confirmed by OnyxMenlo Park · $100K – $20M

How we know: the company's own site · a partner's Signal profile · businessinsider.com · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

Eight Capitallisted by Eight CapitalNorwalk

How we know: Y Combinator's founder network · eightcapital.com · Not right? Tell us

Pioneerlisted by PioneerToronto, Ontario

How we know: Y Combinator's founder network · pioneerfund.vc · open dataset · 5k.vc investor directory · Not right? Tell us

Afore CapitalreportedSan Francisco · $500K – $2M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Fin CapitalreportedSan Francisco · $250K – $15M

How we know: Y Combinator's founder network · Not right? Tell us

Liquid VenturesreportedSan Francisco · $250K – $5M

How we know: Y Combinator's founder network · open dataset · 5k.vc investor directory · Not right? Tell us

Twenty Two VenturesreportedPalo Alto · $50K – $250K

How we know: Y Combinator's founder network · Not right? Tell us

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

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Companies working in the same space as Onyx.

Legal entities · 1

corporate structure
DanswerAI, Inc.

In the news

Why Onyx thinks its open source solution will win enterprise search | TechCrunchtechcrunch.com · Mar 2025Onyx Raises $10M To Help Teams Find Knowledge Faster with Open Source AI Agentsfinance.yahoo.com · Mar 2025Onyx - Open Source Unified Searchycombinator.com · Jan 2024

Frequently asked questions

What does Onyx do?
Onyx is an open-source application platform for large language models that enables teams to leverage any LLM while maintaining data transparency and customization. The platform integrates internet search, internal knowledge connectors, code execution, and model context protocol integrations to provide enterprise and startup teams with flexible AI deployment options.
Who founded Onyx?
Onyx was founded by Yuhong Sun, Chris Weaver in 2023.
Who are Onyx's investors?
Onyx's investors include Y Combinator, First Round Capital, Khosla Ventures, Eight Capital, Pioneer, Afore Capital, Fin Capital, Liquid Ventures and 1 more.
Where is Onyx headquartered?
Onyx is headquartered in San Francisco, US.