/Companies

Oumi

Bellevue, US · Founded 2024 · 42 employees on LinkedIn · 11 known investors

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Oumi is a platform for building, fine-tuning, and deploying custom specialized AI models, automating the model development lifecycle including evaluations, data generation, training, and deployment. It serves ML teams, researchers, and enterprises who want to own their model weights and data rather than rely on rented frontier models.

Also known as Oumi AI

Founders & leadership

JGJeremiah Greer
Jeremiah GreerCofounder, ResearchJeremiah Greer worked as a Senior ML Software Engineer at Google on safety systems for large language models (Gemini and PaLM), and as a Software Engineer at Microsoft on AI-powered scheduling tools. He holds a master's degree involving machine learning and deep learning techniques for analyzing software executables, with prior research experience at UC Berkeley in data science and genetic algorithms for software security.
KAKostas Aisopos
Kostas AisoposCo-FounderFounder of Oumi, a platform for building, fine-tuning, and deploying custom AI models. Aisopos focuses on enabling ML teams and enterprises to develop and own specialized models rather than rely on third-party frontier models.
MPMatthew Persons
Matthew PersonsCofounder, EngineeringMatthew Persons previously led the Natural Language team at Google Cloud and is now co-founder of Oumi, which provides a platform for building, fine-tuning, and deploying custom AI models.
MAMichael Anthony Schuler
Michael Anthony SchulerCo-founder · Staff Linguist & UXer2024–2026Michael Anthony Schuler leads multilingual evaluation at Cartesia, developing evaluation systems for voice AI quality across languages. He trained as a linguist and has worked at the intersection of linguistics and machine evaluation systems.
OEOussama Elachqar
Oussama ElachqarCo-FounderHe previously worked as a machine learning engineer and manager on health foundation models at Apple, and built production ML systems at Twitter, Microsoft, and Photobox.
WZ
William ZFounder
E(Emmanouil (Manos) Koukoumidis
Emmanouil (Manos) KoukoumidisCo-founder · CEO
MK
Manos KoukoumidisFounder

Investors · 11

Also in the syndicate · 5

Clem DelanguePlug and PlayRagavan SrinivasanRuslan SalakhutdinovVipul Ved Prakash

Funding

SEC filings, press & company announcements

$10M disclosed across 1 of 2 rounds · 2025

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

Company profile

researched Aug 2026

Oumi is an open-source artificial intelligence company that develops a platform covering the full lifecycle of large foundation model development, including data preprocessing, pretraining, fine-tuning, evaluation, inference and deployment. The platform is designed to run in different environments, supports both open models and commercial APIs, and offers prebuilt workflows. The company's stated aim is to make frontier AI development collaborative and openly accessible, in contrast to model providers that release only open weights without training pipelines, preprocessing code or data provenance.

The company came out of stealth in January 2025 and is organized as a public benefit corporation. Its founding team consists of machine learning engineers and researchers who previously worked on generative AI products at Google (including Google Cloud generative AI, PaLM, Gemini alignment and responsible AI), Apple, Meta, Microsoft and Amazon. Alongside the core team, Oumi lists a large group of academic "founding scholars," collaborators and advisors from universities including CMU, Princeton, Stanford, MIT, Caltech, UC Berkeley, NYU, the University of Washington and the University of Oxford.

Oumi positions its work as enabling an open community to collectively match or exceed the capabilities of closed model providers, with leadership describing the goal as a "Linux moment" for AI. Its stated core values emphasize broad accessibility of AI, enterprise customer focus, collaboration, ownership and scientific rigor.

Founding story

Oumi was co-founded by CEO Manos Koukoumidis, a former senior engineering manager at Google Cloud who also worked at Meta and Microsoft and holds a Princeton PhD, together with Oussama Elachqar, a former machine learning engineer at Apple, Twitter and Microsoft, and additional co-founders drawn largely from Google's Gemini, PaLM and Cloud generative AI teams. The founders' thesis was that AI needed a "Linux moment," with an open community co-building frontier models rather than relying on closed, compute-gated providers.

Business model

Oumi provides an open-source platform for foundation model development and plans to monetize by offering open-source solutions tailored to enterprises, such as hosted versions of its training and inference workflows.

Enterprise-oriented commercial offerings layered on the open-source platform, including hosted training and inference workflows.

Traction

At the time of its seed announcement, Oumi reported partnerships with 13-15 leading AI research universities in the U.S. and U.K., engagement with 36 AI researchers, and a core team of 10. Its site lists a broad roster of academic founding scholars, collaborators and advisors.

Latest developments

Oumi's company page promotes an "Oumi Summer '26" launch, and press coverage references the launch of a commercial platform for custom AI models and the addition of an executive.

▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Positioned as an alternative to closed, proprietary foundation model providers and to partially open model releases such as DeepSeek and Llama that publish weights without complete pipelines or data provenance.

Full-stack openness: rather than publishing model weights alone, Oumi aims to release every component of the development lifecycle, including training pipelines, preprocessing code and data provenance, so results can be reproduced and extended. It is also incorporated as a public benefit corporation.

Technology

An end-to-end, unconditionally open-source platform for large foundation models spanning data preprocessing, pretraining, fine-tuning, evaluation, inference and deployment. It can run across environments, works with open models and commercial APIs, and includes prebuilt workflows. The company emphasizes releasing full training pipelines, preprocessing code and data provenance rather than open weights alone.

Go-to-market

Community and research-led adoption of the open-source platform, supported by partnerships with top AI research universities in the U.S. and U.K. and a network of academic founding scholars and advisors, with enterprise offerings sold alongside.

AI researchers and developers, academic research groups, and enterprises in sectors where trust, reliability and scalability requirements are significant.

Geography

Headquartered in the Seattle area; research university partnerships span the United States and the United Kingdom, including the University of Washington.

History

The company emerged from stealth in late January 2025 with a $10 million seed round and a plan to build an open-source AI research and development platform. It has since continued to expand its platform and, according to its own site, announced an "Oumi Summer '26" release.

Risks & controversies

Investor commentary notes that monetizing open-source software is difficult and that aligning a decentralized contributor community requires sustained effort.

Compiled by commissioned research from 6 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
AI researchers engagedJan 202536 researchers
Core team sizeJan 202510 people
University research partnersJan 202515 universities

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Timeline · 3

launches, deals, and filings
Jan 2026
Oumi Summer '26 release

The company's site promotes an 'Oumi Summer '26' launch.

source ↗

Jan 2025
Oumi emerges from stealth with $10M seed round

Oumi came out of stealth mode announcing a $10 million seed round led by Venrock and Obvious Ventures, with participation from Plug and Play and Ascend, plus angel investors including Ruslan Salakhutdinov, Ragavan Srinivasan, Vipul Ved Prakash and Clem Delangue.

$10M source ↗

Jan 2025
Research partnerships with AI research universities

Oumi reported partnering with leading AI research universities in the U.S. and U.K., including the University of Washington, and engaging 36 AI researchers.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

In the news

▸Research sources · 6

primary sources listed

6 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Oumi do?
Oumi is a Seattle-based public benefit corporation building a fully open-source platform for developing large foundation models.
Who founded Oumi?
Oumi was founded by Jeremiah Greer, Kostas Aisopos, Matthew Persons, Michael Anthony Schuler, Oussama Elachqar, William Z, Emmanouil (Manos) Koukoumidis in 2024.
Who are Oumi's investors?
Oumi's investors include Ascend Venture Capital, Mozilla Ventures, Obvious Ventures, Plug and Play Ventures, Venrock, Ascend.
How much funding has Oumi raised?
Oumi has disclosed $10M raised across 1 of its 2 known rounds.
Where is Oumi headquartered?
Oumi is headquartered in Bellevue, US.