Company lists · Data refreshed September 2026
Top 25 Openai companies based in the United States
RevenueBase identified 1,477 openai companies headquartered in the United States as of September 2026 and tracks 66,825 professional contacts across them, including 17,622 with verified work emails. San Francisco is the largest hub.
This list covers openai companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest openai companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 7,563 contacts → | ||||
Strong evidence “OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,154 contacts → | ||||
Indirect evidence “Fractal is a publicly listed global enterprise AI company with a vision to power every human decision in the enterprise.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 6,094 contacts → | ||||
Indirect evidence “Turing is one of the world’s fastest-growing AI companies accelerating the advancement and deployment of powerful AI systems.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4,886 contacts → | ||||
Indirect evidence “TELUS Digital AI & Data Solutions partners with a diverse and vibrant community to help our customers enhance their AI and machine learning models.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 3,544 contacts → | ||||
Indirect evidence “Nuance Communications is a technology pioneer with market leadership in conversational, ambient, and generative AI.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,982 contacts → | ||||
Indirect evidence “Zero distance innovation for GenAI creators and industries Expertly engineering platforms and curating multimodal, multilingual data, we empower the ‘Magnificent Seven’ and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,323 contacts → | ||||
Indirect evidence “Kaggle is a global community of practitioners, researchers, and enthusiasts building and advancing the frontier of AI.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 967 contacts → | ||||
Indirect evidence “Snorkel AI is the frontier AI data lab, helping teams build the data and environments behind high-performing frontier and agentic AI.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 895 contacts → | ||||
Indirect evidence “Trilogy acquires software companies and fundamentally transforms them with an AI-first strategy.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 770 contacts → | ||||
Indirect evidence “Thoth AI is a global AI data solutions company with R&D operations in Silicon Valley, working with AI teams to support the design, development, and deployment of production-grade…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 738 contacts → | ||||
Indirect evidence “Akvelon is a software engineering company helping enterprise teams turn AI adoption into measurable engineering results: improving productivity, reducing inefficiencies, and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 679 contacts → | ||||
Indirect evidence “Research Lab.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 533 contacts → | ||||
Indirect evidence “Woflow builds AI Agents for enterprises.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 525 contacts → | ||||
Indirect evidence “Anaconda, the leader in advancing AI innovation, is the trusted foundation for AI-native development that empowers builders and enterprises to secure, orchestrate, and accelerate…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 441 contacts → | ||||
Indirect evidence “Labelbox builds and operates reinforcement learning data factories for the world’s leading AI labs and enterprises, powering the next generation of frontier models and AI…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 438 contacts → | ||||
Indirect evidence “Tools for Humanity is a technology company built to ensure a more just economic system.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 422 contacts → | ||||
Indirect evidence “Tuya Inc.(NYSE: TUYA; HKEX: 2391) is a leading global AI cloud platform service provider dedicated to bringing AI into everyday life.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 405 contacts → | ||||
Indirect evidence “Founded in 2012, H2O.ai is on a mission to democratize AI.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 401 contacts → | ||||
Indirect evidence “Build Super Accurate AI with us.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 374 contacts → | ||||
Indirect evidence “Revelo provides data infrastructure for frontier model AI code generation, including expert annotators, eval frameworks, and reinforcement learning gyms.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 372 contacts → | ||||
Indirect evidence “Shorthills AI is a Generative AI and data engineering company that derives its name from Short Hills, New Jersey with offices in India, USA, Australia and Canada.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 357 contacts → | ||||
Indirect evidence “Weights & Biases: the AI developer platform.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 302 contacts → | ||||
Indirect evidence “We are a Seattle-based non-profit AI research institute founded in 2014 by the late Paul Allen.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 290 contacts → | ||||
Indirect evidence “AI4ALL is an award-winning nonprofit committed to ensuring AI benefits humanity.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 285 contacts → | ||||
Indirect evidence “Coder is an AI software development company leading the future of autonomous coding.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: openai companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names openai companies.
- Partial evidence
- Its own public description names part of openai companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name openai companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,477 openai companies based in the United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 17,622 reachable decision-makers.
Free signup · no credit card
Openai companies based in the United States at a glance
As of Sep 27, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,477 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among openai companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “openai companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names openai companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among openai companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 17,622 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Openai companies by metro
- Openai companies in San Francisco258
- Openai companies in New York125
- Openai companies in Austin46
- Openai companies in Los Angeles39
- Openai companies in Boston37
- Openai companies in Palo Alto37
- Openai companies in Miami33
- Openai companies in San Jose26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names openai companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many openai companies are there based in the United States?
RevenueBase identified 1,477 openai companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Openai, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most openai companies?
San Francisco leads with 258 headquartered companies, followed by New York (125) and Austin (46).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 17,622 verified decision-maker contacts tracked across these 1,477 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,477 openai companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Openai companies by geography
- Openai companies based in Bangalore, India
- Openai companies based in Bengaluru, India
- Openai companies based in Hyderabad, India
- Openai companies based in Mumbai, India
- Openai companies based in Austin, United States
- Openai companies based in Boston, United States
- Openai companies based in Los Angeles, United States
- Openai companies based in Miami, United States
- Openai companies based in New York, United States
- Openai companies based in Palo Alto, United States
- Openai companies based in San Francisco, United States
- Openai companies based in Australia
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Openai companies based in Bangalore, India
- Openai companies based in Bengaluru, India
- Openai companies based in Hyderabad, India
- Openai companies based in Mumbai, India
- Openai companies based in Austin, United States
- Openai companies based in Boston, United States