ASI: Air Traffic AI Startup Hits US$3B Valuation After US$325M Raise

ASI, a Boston-based company formerly known as Air Space Intelligence, has raised a US$325 million Series C at a US$3 billion valuation, Bloomberg reported on October 20, 2026. Spark Capital, an existing investor, led the round, with participation from affiliates of Citadel Securities, Meritech Capital, Craft Ventures, Energy Impact Partners and Andreessen Horowitz, which led the company's previous round. ASI is led by founder and CEO Phillip Buckendorf, who spent about a decade building prediction software for aerospace and self-driving cars before starting the company.

ASI builds AI models that simulate physical systems ahead of time, forecasting air traffic, power grid conditions and military operations hours to weeks out so operators can act before problems spread. Its customers include Delta, United and Alaska Airlines, utility National Grid, the U.S. Air Force and, since June, the Federal Aviation Administration, which picked ASI over Palantir and Thales for a 12-year air traffic planning contract worth up to US$875 million. In October, the U.S. Army awarded ASI a five-year command software contract with a US$99 million ceiling. The company will use the new funds to expand in energy, logistics and military field operations and to grow its Boston research and engineering teams.

Market Context

ASI's valuation has risen about tenfold since December 2023, when it raised a US$34 million Series B led by Andreessen Horowitz at roughly US$300 million, according to Bloomberg at the time. The jump reflects a broader rush into U.S. defense and aerospace technology. In the same month, Anduril opened an employee share sale at a US$90 billion valuation. According to The Boston Globe, citing PitchBook, the round ranks among the largest venture deals in Massachusetts this year and trails only music AI company Suno among local AI startups.

The FAA contract is the centerpiece. The agency began using ASI's system around Washington, D.C. in September and plans a nationwide rollout in 2027, as part of a wider effort to modernize an air traffic control system strained by delays and outdated equipment. ASI is also part of a smaller group of AI companies focused on physical infrastructure, rather than chatbots and text generation, which have drawn most of the sector's capital.

Key Signal

"Instead of relying on research work that might take five to 10 years, the government is acquiring proven capability." Phillip Buckendorf, Founder and CEO, ASI, speaking to Bloomberg TV

Regional Relevance

For the United States, ASI sits at the center of two pressing infrastructure problems. Air traffic control has faced staffing shortages and outages, and power grids are under pressure from rising demand, including from data centers. A system that predicts trouble before it happens could reduce delays and outages, and its FAA and Army contracts show Washington is willing to buy that kind of software from startups, not only from traditional defense contractors.

For Massachusetts, ASI's growth is a win for the Boston tech scene. The company moved its headquarters from Silicon Valley to Boston in 2024 and plans to expand its research and engineering teams there, adding to the region's base in AI, aerospace and defense research.

The Other Side

What does it mean if the FAA becomes a shareholder? Politico reported that the FAA is seeking an equity stake in ASI, citing an internal document. Semafor described the talks as early, with no specific terms, and raised questions about the agency's legal authority. A regulator that also owns part of its contractor would face obvious conflicts. None of the reporting links these talks to the new round.

How much of the contract value is real revenue? The FAA deal is worth "up to" US$875 million over 12 years and depends on funding and milestones. The Army figure is a ceiling, not committed spending. ASI has not disclosed revenue or profitability, so the US$3 billion valuation is hard to measure against actual sales.

Can one model run very different systems? ASI built its reputation in airline operations. Power grids and military logistics have different data, rules and risks. The expansion is promising, but results outside aviation are still limited.

Sources & Transparency

• ASI Hits $3 Billion Valuation in $325 Million Round Led by Spark
• AI infrastructure management software startup ASI hits $3B valuation after raising $325M in funding
• ASI hits a $3bn valuation as its AI moves from air traffic to the grid
• ASI raises $325 million at a $3 billion valuation to expand infrastructure AI
• ASI raises $325 million at a $3 billion valuation to expand AI that plans air traffic, power grids and military logistics