San Francisco’s office market is being reshaped dramatically by the explosive growth of artificial intelligence (AI) startups. Previously marked by a proliferation of sublet space, the city is now experiencing a spike in demand for permanent office leases, marking a turning point towards long-term commitments in the tech industry.
The Emergence of AI Startups and Its Effect on Office Space Demand
The growth of AI firms in San Francisco has been phenomenal. In 2025 alone, leading AI companies like OpenAI, Anthropic, Databricks, and Harvey collectively leased close to 1 million square feet of office space. This leasing activity is not an ephemeral trend but is part of a larger shift where AI startups are increasingly turning to long-term office leases instead of short-term sublets.
For example, Vercel, a cloud-platform company, recently took space at the 201 Mission St. tower in the SoMa district, essentially backfilling a previous Indeed office campus. Likewise, Abridge, an AI firm focused on medical note-taking, leased the whole 208 Utah St. building, a building that once was home to a generation of startups. These transactions are a reflection of increasing confidence in the city’s commercial property market and a desire to make a permanent presence in San Francisco (CoStar).
The Sublet Availability Decline
The rise in popularity of long-term leases is resulting in a significant reduction in available sublet office space in San Francisco. Sublease availability has fallen 20% year-over-year as of mid-2025, landing at 6.6 million square feet—the lowest level since 2020. This decrease is reflective of AI firms dissociating from short-term arrangements and obtaining fixed locations to house their expanding teams and operations.
Economic Implications and Future Outlook
AI startups’ trend of converting to permanent office leases is contributing positively towards San Francisco’s commercial real estate market. As per a report by VTS, demand for offices in the city was 107% higher in terms of year-over-year growth during August 2025 and 356% higher since November 2022, when ChatGPT was launched. This has resulted in a recovery in leasing activity, with 2.71 million square feet of office space being leased within the second quarter of 2025—the highest volume on record since the third quarter of 2019.
Yet, the experts advise that although the present boom is flattering, there are risks associated with it. Most AI startups are only in the nascent stages of development and may struggle to achieve profitability. The steep growth and high valuations of these organizations have left observers speculating about the possibility of a speculative bubble, much like the dot-com bubble.
Conclusion
San Francisco’s office space is undergoing a dramatic transformation, with AI startups shifting from short-term sublet deals to long-term office leases. This shift is an indication of the increasing maturity and confidence of the San Francisco AI sector. Although the long-term implications are yet to be witnessed, the trend suggests a dynamic and thriving commercial real estate market in San Francisco fueled by the emerging AI economy.
