San Francisco has become one of the most important cities in the world for artificial intelligence. The city has attracted some of the biggest AI companies, fast-growing startups, researchers, software developers, and investors. From companies building popular AI assistants to businesses creating tools for offices, healthcare, law, and customer service, AI is now an important part of San Francisco’s technology economy.
The city’s AI growth is not limited to one type of company. Some businesses build AI models that can understand and create text, images, code, and other forms of information. Others use AI to help companies work with data, develop software, serve customers, or make business decisions. Recent reports show that OpenAI, Anthropic, Databricks, Scale AI, and several newer companies have built a major presence in San Francisco.
This growth has also changed the city’s business landscape. AI companies are taking up large amounts of office space and bringing thousands of technology workers into San Francisco. A 2026 report from the San Francisco Standard found that OpenAI and Anthropic were among the largest AI companies by office footprint in the city, while companies such as Scale AI, Sierra, and Thinking Machines Lab were also expanding their presence.
OpenAI
OpenAI is one of the most recognized AI companies in San Francisco. The company was founded in 2015 and has developed products such as ChatGPT, which has helped make AI assistants familiar to millions of people.
OpenAI works on AI systems that can understand natural language, answer questions, create content, work with images, and assist with programming and other tasks. Its technology is used by individual users as well as businesses.
The company has also grown significantly in San Francisco. According to the San Francisco Business Times, OpenAI Group PBC reported $13.1 billion in 2025 revenue and had about 4,310 Bay Area employees. The publication listed the company as the largest private company in the Bay Area by 2025 revenue.
OpenAI’s growth is an important part of San Francisco’s wider AI story. The company continues to hire for research, engineering, data, product, and other roles in the city and elsewhere.
Anthropic
Anthropic is another major AI company based in San Francisco. Founded in 2021, the company focuses on building AI systems that it says should be reliable, understandable, and easier for people to control.
Its best-known product is Claude, an AI assistant that can help with writing, research, coding, analysis, and other tasks. Anthropic also conducts research into how advanced AI systems behave and how they can be developed with stronger safety measures.
The company has grown quickly. The San Francisco Business Times reported $10 billion in 2025 revenue and about 1,500 Bay Area employees for Anthropic. Its San Francisco office is located on Howard Street.
Anthropic has also been increasing the role of AI in its own research work. In September 2026, Reuters reported that Claude was being used in a growing share of Anthropic’s work on developing its next generation of AI systems, while the company said human oversight remained part of the process.
Databricks
Databricks is another major San Francisco technology company with a strong focus on AI and data. The company was founded in 2013 and provides software that helps businesses store, organize, analyze, and use large amounts of information.
As companies have started using more AI, the ability to manage information has become increasingly important. Databricks connects data management with AI tools so businesses can develop applications and use their own information more effectively.
The company has become one of the largest private technology businesses in the Bay Area. The San Francisco Business Times reported that Databricks generated $5.4 billion in 2025 revenue and had about 1,770 Bay Area employees.
Databricks is also expanding outside the United States. A September 2026 report from The Wall Street Journal said the company planned to invest more than $1 billion in Asia over three years as demand for its data and AI products continued to grow.
Scale AI
Scale AI has played an important role in building the systems needed to develop modern AI. The company provides services that help businesses and AI developers prepare and organize information used to train and test AI systems.
Its work is less visible to everyday users than products such as ChatGPT or Claude, but it is important to the development of AI applications. Companies need high-quality information and testing processes before AI systems can be used effectively.
Scale AI has been part of San Francisco’s AI community for several years. The company was also identified as one of the major AI companies with a large San Francisco office presence in earlier years. While some newer companies have expanded quickly, Scale AI remains one of the established names in the city’s AI sector.
Perplexity AI
Perplexity AI has built an AI-powered search and information service. Instead of simply showing a traditional page of search results, its service is designed to provide direct answers and supporting information.
The company has attracted attention as people look for new ways to search the internet and interact with information. Its product combines conversational questions with online search, allowing users to ask follow-up questions instead of entering a completely new search every time.
Perplexity is part of a larger group of San Francisco companies trying to change how people interact with information. The company is also included among San Francisco’s major AI businesses in current industry listings.
Sierra
Sierra is a newer San Francisco AI company focused on customer service. Its technology allows businesses to create AI-powered customer service systems that can communicate with customers and help handle common requests.
The company is associated with Bret Taylor and has grown rapidly in the San Francisco market. The San Francisco Standard reported that Sierra had expanded enough to become one of the city’s larger AI office users, placing it among a newer generation of companies growing alongside OpenAI and Anthropic.
Sierra represents an important direction for AI in business. Instead of using AI only for answering questions or creating content, companies are increasingly using it to communicate directly with customers and assist with everyday business tasks.
Thinking Machines Lab
Thinking Machines Lab is one of the newer names in San Francisco’s AI industry. The company was founded by Mira Murati, a former OpenAI executive, and has attracted significant attention since its launch.
The company is working on advanced AI research and products. Although it is much younger than OpenAI or Anthropic, its rapid growth shows how quickly new AI businesses can emerge in San Francisco.
The San Francisco Standard included Thinking Machines Lab among the newer AI companies expanding their presence in the city.
Its arrival also demonstrates that San Francisco continues to attract experienced AI researchers and technology leaders who want to build new companies.
Harvey
Harvey focuses on AI tools for legal work. Its software is designed to help lawyers and legal teams with tasks involving documents, research, writing, and analysis.
Legal work involves large amounts of written information, making it an area where AI tools can be useful. Harvey is part of a broader group of companies using AI for specific professional industries rather than building a general-purpose assistant for everyone.
Current San Francisco AI company listings include Harvey among the notable companies operating in the city.
Its growth shows how AI is moving into professional services. Instead of replacing the need for trained professionals, these tools are generally designed to help people handle information and complete routine work more efficiently.
Why San Francisco Has So Many AI Companies
San Francisco’s AI growth comes from several factors. The city already had a large technology industry before the recent AI boom. That created a strong base of software developers, researchers, business leaders, investors, and technology companies.
The wider Bay Area also has close connections with universities, research organizations, venture capital firms, and large technology businesses. This makes it easier for new companies to find employees, funding, customers, and business partners.
Another important factor is the concentration of experienced technology workers. People who have worked at established companies often leave to create startups of their own. This creates a cycle in which knowledge and experience move from one company to another.
The current scale of AI investment has made this effect even stronger. KPMG’s 2026 Venture Pulse report showed that OpenAI, Anthropic, and Databricks were among the largest global technology financings in the first quarter of 2026, with all three based in San Francisco.
How AI Is Changing San Francisco
The growth of AI companies is changing more than the technology industry. It is also affecting office buildings, employment, investment, and the local business economy.
AI companies have been taking space in buildings that previously had fewer technology tenants. According to the San Francisco Standard, OpenAI had expanded its estimated San Francisco office footprint to more than one million square feet, while Anthropic and other AI companies were also taking significant office space.
The city is also becoming a meeting place for AI researchers, company executives, investors, and developers. Major technology events increasingly feature AI discussions, product demonstrations, and business meetings.
At the same time, rapid growth brings questions about housing, office costs, employment, energy use, privacy, and the wider effect of AI on jobs. These questions are likely to remain important as companies continue developing and selling AI products.
The Future of AI Companies in San Francisco
San Francisco’s AI industry is still developing. Established companies such as OpenAI, Anthropic, and Databricks continue to expand, while newer businesses are entering areas such as customer service, legal work, search, software development, healthcare, and scientific research.
The city is also seeing competition between companies with very different approaches. Some focus on general AI assistants, while others build products for particular industries. This variety means that the next stage of San Francisco’s AI economy may not be controlled by one type of company.
The future will depend on how businesses use AI in real-world situations. Companies will need to show that their products are useful, reliable, affordable, and safe enough for everyday use. Customers will also become more careful about which AI tools they trust with their information.
For San Francisco, the continued growth of these companies could make AI an even larger part of the city’s technology and business identity. OpenAI, Anthropic, Databricks, Scale AI, Perplexity, Sierra, Thinking Machines Lab, and Harvey represent different parts of this growing ecosystem.
Conclusion
San Francisco has become a major center for artificial intelligence because it brings together established technology companies, new startups, skilled workers, investors, and research talent. Companies such as OpenAI and Anthropic are developing widely used AI assistants, while Databricks focuses on data and business software, Scale AI supports AI development, and companies such as Sierra, Harvey, and Perplexity are applying AI to specific types of work.
As the technology develops, San Francisco is likely to remain an important place for companies building new AI products. The biggest changes may come not only from the largest companies, but also from smaller businesses finding practical ways to use AI in everyday work.
