Together AI Expands HQ

Together AI has signed a lease for a new 150,000-square-foot headquarters at 2 Henry Adams Street in San Francisco’s Showplace Square. (therealdeal.com) The company took two floors in the roughly 329,000-square-foot building under a six-year lease, according to The Real Deal and the San Francisco Business Times. Financial terms were not disclosed. (therealdeal.com, bizjournals.com) JLL represented Together AI in the deal, and Cushman & Wakefield represented the landlords, led by RREEF Property Trust. The move shifts the company into the city’s Design District, a neighborhood that has drawn newer office tenants looking for large floor plates. (therealdeal.com, bisnow.com) Together AI is an artificial intelligence cloud company that rents computing power and tools to developers building models and applications. In February 2025, it said it had raised a $305 million Series B led by General Catalyst and Prosperity7, with participation from Nvidia and Salesforce Ventures. (together.ai, prnewswire.com) That funding round valued the company at $3.3 billion, according to Crunchbase News. The size of the new lease points to a company still adding headcount and customer-facing operations in San Francisco more than a year after that raise. (news.crunchbase.com, bizjournals.com) The deal also lands as San Francisco’s office market shows a measurable rebound. CBRE said the city’s overall office vacancy rate was 30.4% in the first quarter of 2026, while Colliers reported 1.4 million square feet of net occupancy gains, the biggest quarterly increase in more than six years. (cbre.com, colliers.com) Brokerage reports have tied much of that rebound to artificial intelligence tenants. Avison Young said San Francisco logged 3.82 million square feet of leasing in the first quarter, the strongest quarter since 2018, with AI companies taking the top three deals and pushing the sector’s office footprint to 8.75 million square feet. (avisonyoung.us) Together AI’s lease fits that pattern: a fast-growing AI infrastructure company taking a large block of space in a city still carrying elevated vacancy. The bet is that customers, recruits, and engineers are still worth clustering in person, even after years of hybrid work. (therealdeal.com, cbre.com, avisonyoung.us)