Top 11+ AI Companies in the USA and What They Do

Note (September 2026): Earlier versions of this list described OpenAI’s corporate structure as it stood in 2023 and presented Stability AI and Contents.com as US companies; OpenAI restructured in October 2025, and those two companies are headquartered in London and Milan.

The top AI companies in the USA include OpenAI, Microsoft, Alphabet (Google), Nvidia, Amazon, Meta, Anthropic, Tesla, Oracle and Adobe, alongside specialists such as Observe.AI. OpenAI and Anthropic build frontier AI models, Nvidia supplies most chips used to train them, and Microsoft, Amazon, Google and Oracle rent AI computing through their clouds.

Key Takeaways

• OpenAI restructured in October 2025: its business is now OpenAI Group PBC, with the non-profit OpenAI Foundation holding about 26% and Microsoft about 27%.
• Nvidia, not listed in the original article, is central to the US AI industry; it passed a $5 trillion market value in October 2025.
• Google’s Bard chatbot was renamed Gemini in February 2024, and Amazon Bedrock has been generally available since September 2023.
• Stability AI (London) and Contents.com (Milan) are not US-headquartered, although both serve US customers.
• According to Stanford’s 2025 AI Index, US institutions produced 40 notable AI models in 2024, versus 15 from China.

Artificial intelligence (AI) is not just a trendy term; it is also one of the most important aspects of the technological environment. Artificial intelligence is used for everything, from recognizing our faces to suggesting the finest items. Every industry and business function is being altered by AI, which is causing interest in its subdomains, applications, and associated sectors to rise.

AI Companies In USA – List of Top AI Companies In USA

Because of this, AI companies are the top innovators advancing the technology quickly. AI enables us to acquire vital data, automate and optimize important business processes, and gradually reshape the world. Through face recognition technology, virtual assistants, gaming platforms, mapping programs, chatbots, and a variety of other software, millions of users engage with AI on a daily basis, either directly or indirectly. Below are 12 notable AI companies with a major presence in the US market, from model developers such as OpenAI to cloud and software giants. Two of them, Stability AI and Contents.com, are headquartered outside the US, as noted in their sections.

Open AI

Elon Musk, Sam Altman, and others established OpenAI in 2015 as a non-profit artificial intelligence research lab. Today, OpenAI is structured differently than it was in 2023. The for-profit arm, once OpenAI LP under the non-profit OpenAI Inc., became OpenAI Group PBC, a public benefit corporation, in a recapitalization completed in October 2025. According to Wikipedia’s summary of the deal, the non-profit OpenAI Foundation holds about 26%, Microsoft about 27%, and employees and other investors the remaining 47%. In order to develop secure artificial general intelligence (AGI), the AI business carries out basic, extensive research.

A deep learning model named DALL-E was made available by OpenAI in 2021. It can create digital images using “prompts” that are composed of concepts, traits, and styles.

OpenAI introduced ChatGPT, a chatbot that uses natural language to answer questions, translate, and produce content on demand, in November 2022. Within the first five days, it attracted over a million signups. Reuters reported at the time that OpenAI was projecting US$200 million in revenue for 2023 and US$1 billion for 2024; actual revenue far exceeded those projections, reaching about US$3.7 billion in 2024 and roughly US$13.1 billion in 2025, according to figures compiled on Wikipedia.

Observe.AI

Observe.AI, headquartered in Redwood City, California, offers AI tools for analyzing voice and text conversations in contact centers. As of September 2026, its website describes an agentic customer-experience platform with Voice AI and Chat AI agents, real-time assistance for human agents, and coaching tools. By integrating AI into customer conversations, enhancing agent effectiveness, and automating recurring activities that increase revenue and customer retention, its Intelligent Workforce Platform transforms contact centers.

The business said that in March 2022, ARR had increased by 150%, with customer interactions assessed by AI increasing by 3x, agent assessments using AI increasing by 426%, and agent coaching sessions increasing by 201%.

By the time of its Series C round in April 2022, Observe.AI had raised more than US$200 million in total, according to its announced Series A, B and C rounds. When it announced the US$125 million Series C on April 12, 2022 (a round in which Zoom participated), the company said it would use the funds to advance its technology and enter new industries.

Microsoft

Microsoft, the world’s largest software company by revenue, invested $1 billion in OpenAI in 2019, making Microsoft Azure OpenAI’s exclusive cloud provider at the time. That exclusivity has since been relaxed: under the October 2025 agreement, OpenAI committed to buy an additional $250 billion of Azure services, and Microsoft gave up its right of first refusal over OpenAI’s future cloud purchases.

A further multi-year, multibillion-dollar investment in OpenAI (reported as $10 billion) was announced in January 2023. In total, Microsoft has invested more than $13 billion in OpenAI and holds a stake of roughly 27% in OpenAI Group PBC. In February 2023, Microsoft relaunched its Bing search engine with a chatbot built on its Prometheus model, which combines Bing search results with OpenAI’s GPT-4. In September 2023, Microsoft began consolidating Bing Chat and its other assistants under the Microsoft Copilot brand. Microsoft Bing is at the vanguard of enterprise use cases for AI, even though it is unlikely that it can surpass Google in terms of search market share.

Adobe

On May 10th, 2023, Adobe (ADBE) revealed the tremendous momentum of Adobe Firefly, which now includes a new integration with Bard by Google and the expansion of the Content Authenticity Initiative. Software for publishing, marketing, data analytics, and content creation is produced by Adobe. Its primary product, Creative Cloud, is a subscription-based collection of design software. Adobe Firefly has grown well beyond its March 2023 beta: in October 2025, Adobe introduced Firefly Image Model 5 along with soundtrack and speech generation and a Firefly video editor, and Firefly can also call partner models from companies such as Google and OpenAI.

In 2023, Adobe revealed new AI and machine learning (ML) features for its Experience Cloud product, a marketing and analytics bundle. These advancements, which also entail predictive capabilities, enable the sales and marketing teams to better comprehend how the various elements of marketing campaigns impact customers’ purchase choices. They may make the most of their funds and projects by using such knowledge.

Stability AI

Stability AI is a generative AI company headquartered in London, UK, rather than in the US. It develops open-weight models that generate images and other media from text prompts, and it is included here because its Stable Diffusion models are widely used by US developers and businesses.

Systems like Dance Diffusion and Stable Diffusion, which generate music and images, were funded by the company. Its current lineup includes Stable Diffusion 3.5 for images, Stable Audio 2.5 for audio, Stable Video Diffusion, and several 3D-generation models.

A personal interest in AI and what he perceived as a lack of “organization” among the open-source AI community led Emad Mostaque to co-found Stability AI (Wikipedia gives 2019 as the founding year). Mostaque resigned as CEO on March 23, 2024, and Prem Akkaraju was appointed CEO in June 2024. In 2023, the company reported using a cluster of over 4,000 Nvidia A100 GPUs running in AWS to train its AI systems.

By building “private” models for clients and granting access to them via DreamStudio (a platform and API), Stability AI intends to generate revenue.

Meta Platforms

A key player in the online advertising sector is Meta Platforms, the company behind well-known social media sites like Instagram and Facebook. Meta has made significant investments in AI and machine learning technology, training advertising models, and creating relevant suggested content for social media users in order to enhance its advertising capabilities. Meta is also building a powerful AI computer. In April 2023, the company unveiled the Segment Anything Model (SAM), which can identify and outline objects in an image even if it has never seen them before.

Investors applauded Meta’s emphasis on AI and cost-cutting, and the company’s stock price climbed in April 2023, increasing by nearly 14%. By the end of 2023, Meta’s share price had more than doubled from where it started the year. Since then, Meta has continued releasing its open-weight Llama models (Llama 4 is the most recent in that series), and in 2025 it reorganized its AI research and product teams under Meta Superintelligence Labs.

Contents.AI

Contents.com (also marketed as Contents.ai) is an AI content-generation platform headquartered in Milan, Italy, with an office in Las Vegas; it appears here for its US presence rather than as a US-headquartered company. When this article was first written in 2023, Contents.com promoted GPT-4-powered tools for generating SEO-oriented text and images. As of September 2026, the company describes its platform as model-agnostic, orchestrating models from Meta, OpenAI, Anthropic, Google and Mistral. With dozens of customizable templates, you can easily create copy for your social media posts, product descriptions for your e-commerce, informative blog articles, and even scripts for promotional videos. The company says its tools help marketing teams produce content faster, with brand-approval workflows built in. As with any AI writing tool, output quality varies, and drafts should be edited and fact-checked before publication. Its current products include an AI Writer, an AI Art image generator, and a conversational HTML editor for building web pages and emails.

Tesla

During the 2023 ChatGPT boom, Tesla was often grouped with AI stocks by market commentators; this article describes the technology and does not offer investment advice. The companies that have the biggest private data sets, the most expertise in their respective fields, and the best AI capabilities will benefit the most from the AI revolution. The EV maker collects driving data from its large fleet of customer vehicles and uses it to train its driver-assistance software. Such data combined with the power of AI modeling can be used to launch and rule new industries. In this scenario, autonomous taxis are at the top of the list. Tesla launched a limited Robotaxi service in Austin, Texas, on June 22, 2025; by September 2026 it operated without an in-vehicle safety supervisor in several Texas and Florida cities and with a supervisor in the San Francisco Bay Area, according to Wikipedia’s summary of company announcements and press reports.

Tesla’s self-driving vehicles are referred to by Elon Musk as “robots on wheels.” Along with selling “robots on legs,” Tesla has big hopes for Optimus, a humanoid robot. A humanoid prototype was displayed during Tesla’s Investor Day in March 2023, and the company asserted that these robots might outshine humans in the future. As of September 2026, Optimus is still not sold commercially; Tesla has shown second-generation versions and announced production plans, while critics have noted that some demonstrations relied on teleoperation.

Oracle

Oracle provides cloud computing hardware and software infrastructure, including Oracle Cloud Infrastructure (OCI), all of which include AI capabilities. The company has strengthened its collaboration with chipmaker Nvidia in order to increase the AI capabilities it offers to enterprise customers. Since 2025, Oracle has become a major AI infrastructure provider: it is a founding partner, with OpenAI, SoftBank and MGX, of the Stargate joint venture announced in January 2025, and in September 2025 it signed a reported $300 billion, five-year cloud computing contract with OpenAI.

Oracle is ready to usher in a new era of cloud innovation in Saudi Arabia in order to boost the Kingdom’s digital economy in accordance with Saudi Vision 2030.

At LEAP 2023, the technology conference in Riyadh, the Oracle exhibit featured an Oracle Red Bull Racing experience. Visitors could try what it is like to drive one of the fastest Formula 1 cars and see the value of real-time data processed by Oracle Cloud.

Alphabet

The parent company of Google and YouTube is Alphabet. Nearly every facet of business operations, including ad pricing, content promotion, and Gmail spam filters, uses AI and automation. Google made considerable investments in AI technology over many years, and in March 2023 it introduced its Bard AI chatbot, which was renamed Gemini on February 8, 2024. Google’s AI research is led by Google DeepMind, formed in April 2023 by merging DeepMind with Google Brain. DeepMind’s Demis Hassabis and John Jumper shared the 2024 Nobel Prize in Chemistry for AlphaFold’s protein-structure prediction, and Google also has vast data resources from Search, YouTube and Android. In terms of public relations, ChatGPT led Bard in 2023, though commentators at the time argued that Google was “closing the performance and perception gap.” Google has since brought Bard and Duet AI together under the Gemini brand and builds Gemini models into Search, Android and Workspace.

Amazon

Amazon offers services and infrastructure for AI and ML through Amazon Web Services (AWS). The huge e-tailer uses AI to make product recommendations in its own online store. Alexa, the virtual assistant of Echo devices, is powered by AI. In February 2025, Amazon announced Alexa+, a generative AI upgrade that is free for Prime members and $19.99 a month otherwise; it became available to all US users in February 2026. Amazon made artificial intelligence (AI) a top priority in 2023 in order to speed up its delivery services. Their goal is to make their items closer to their clients.

Amazon announced Amazon Bedrock, a business-focused generative AI platform that competes with OpenAI’s offerings, on April 13, 2023, and Bedrock became generally available on September 28, 2023. Bedrock gives AWS customers a single API to foundation models from several companies, including Anthropic, in which Amazon has invested a total of $8 billion.

PromptPal

PromptPal is a platform where users can share and discover the best AI prompts. At launch in 2023, it focused on ChatGPT and Google Bard (now Gemini) and said it planned to expand to other AI platforms. PromptPal was only a few months old when this article was first published in 2023. As of September 2026, its original web address redirects to a different domain, so readers should confirm the service is still operating before relying on it.

The founder of PromptPal strongly believes these AI systems are only as good as what you put into them. If you prompt them well and provide high-quality, well-structured data, you will get the most optimal results and that’s where platforms like PromptPal are really helpful.

What Is an AI Company?

An AI company is a business whose main products or competitive advantage come from artificial intelligence, such as machine learning models, AI chips, or the cloud infrastructure used to train and run them. The US AI industry spans three layers: model developers (OpenAI, Anthropic, Google DeepMind, Meta), infrastructure providers (Nvidia, Microsoft Azure, Amazon Web Services, Google Cloud, Oracle Cloud Infrastructure), and application companies that build AI into specific products (Adobe, Observe.AI, Tesla).

Many of the same companies also lead in data science and automation; see our lists of top data science companies in the USA and top robotics companies in the USA for adjacent fields.

Other Major US AI Companies to Know

The original list above was compiled in 2023. Two US companies that have since become central to the AI industry deserve a place alongside it.

Nvidia

Nvidia, headquartered in Santa Clara, California, and led by co-founder Jensen Huang, designs the graphics processing units (GPUs) used to train and run most large AI models, including its H100 and Blackwell data center chips. According to Wikipedia, Nvidia controlled more than 80% of the market for GPUs used in AI training and deployment as of 2025.

Nvidia became the first company to reach a $4 trillion market value in July 2025 and passed $5 trillion in October 2025. For its fiscal year ended January 2026, Nvidia reported revenue of about $215.9 billion.

Anthropic

Anthropic is a San Francisco AI safety and research company founded in 2021 by former OpenAI staff, including siblings Dario and Daniela Amodei. Anthropic develops the Claude family of AI models, first released to the public in March 2023, and operates as a public benefit corporation.

Amazon has invested a total of $8 billion in Anthropic, and Google has also invested. Claude models are available through Amazon Bedrock and Google Cloud as well as through Anthropic’s own apps and API.

Top AI Companies in the USA at a Glance

The table below summarizes where each company on this page is headquartered and what it is best known for in AI, as of September 2026.

Why Does the US Lead in Artificial Intelligence?

The United States leads in AI mainly because of investment, talent and computing power. According to Stanford University’s 2025 AI Index Report, US private AI investment reached $109.1 billion in 2024, nearly 12 times China’s $9.3 billion and 24 times the UK’s $4.5 billion.

The same Stanford report found that US-based institutions produced 40 notable AI models in 2024, compared with 15 from China. Adoption is also broad: 78% of organizations said they used AI in 2024, up from 55% a year earlier. That demand is reshaping hiring, as covered in our guide to how AI is changing career paths and job skills.

How to Evaluate an AI Company

Whether you are choosing a vendor, a partner or an employer, the same questions help separate substance from marketing:

• Core technology: Does the company build its own models or chips, or does it wrap another provider’s model? Both can be useful, but they carry different risks.
• Data practices: How does it handle customer data, and is customer data used to train its models?
• Track record: Are its claims backed by public product releases, audited results or independent reporting rather than press releases alone?
• Stability: Small AI start-ups change quickly; check that the product and website are still active, as the PromptPal entry above shows.
• Location and jurisdiction: Headquarters matter for data protection law and support; not every company marketed as “US” is based there.

For businesses hiring outside help, our guide on how to choose the best AI development company covers vendor selection in more detail. Readers considering AI as a career can start with our overview of top professional careers in artificial intelligence.

This list describes companies and their technology; it is not a ranking of stocks and is not investment advice.

Frequently Asked Questions

Which is the biggest AI company in the USA?

By market value, Nvidia is the largest AI-focused company in the USA; it became the first company to pass a $5 trillion valuation in October 2025. Among AI model developers, OpenAI, maker of ChatGPT, is the best known, while Microsoft, Alphabet and Amazon run the largest AI cloud platforms.

Who owns OpenAI?

OpenAI’s business is OpenAI Group PBC, a public benefit corporation created in an October 2025 recapitalization. According to Wikipedia’s summary, the non-profit OpenAI Foundation owns about 26%, Microsoft about 27%, and employees and other investors about 47%.

What happened to Google Bard?

Google Bard was renamed Gemini on February 8, 2024. Google combined Bard and Duet AI under the Gemini brand and now uses Gemini models across Search, Android and Workspace.

Is Stability AI an American company?

No. Stability AI is headquartered in London, UK. Its Stable Diffusion image models are widely used by US developers, which is why it often appears on lists of AI companies in the US.

Which AI companies make the chips that power AI?

Nvidia is the dominant supplier of AI training chips, with more than 80% of the market for AI GPUs as of 2025, according to Wikipedia. Cloud providers such as Google, Amazon and Microsoft also design their own AI chips, and Oracle has announced cloud services using AMD’s AI accelerators.

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