$3 Billion for Air Traffic AI. A Unicorn Four Months After Launch.

Good morning, Mason here,

This week a lot of the money went to AI that touches the real world.

ASI, which is helping modernize U.S. air traffic control, raised $325 million at a $3 billion valuation.

OpenAI's former research chief now has a factory AI company worth $1.5 billion.

A startup trying to take pilots out of cargo planes crossed $1 billion.

And an AI assistant that launched in June is already a unicorn.

Six deals. Very different amounts of proof.

Some of these prices come with government contracts. Some come with a few months of revenue.

Read time: 5 mins

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FOLLOW THE MONEY

ASI builds AI that helps manage air traffic, power grids and military operations. Image: ASI

ASI, the Boston company formerly known as Air Space Intelligence, raised a $325 million Series C at a $3 billion valuation. Spark Capital led it. Andreessen Horowitz, Craft Ventures, Meritech and Energy Impact Partners put money in too, plus affiliates of Citadel Securities.

Don't think chatbot here. Its models predict what's about to happen in physical systems hours or days ahead, so the people running air traffic, power grids or military operations can plan for it. Delta, United and Alaska use it, and so does National Grid.

The government work is the real story. In June, the FAA and the Department of Transportation picked ASI for a 12-year, $875 million contract to modernize the national airspace system. It beat Palantir and Thales for it. This month the Army added a five-year, $99 million contract for command and control software.

I like this one. A $3 billion price backed by a federal program is a lot easier to defend than most AI valuations I write about. Just remember that $875 million gets paid out over 12 years, not all at once.

Arda builds AI agents for manufacturing engineers. Image: Arda

Arda told CNBC on Tuesday that it has raised $230 million at a $1.5 billion valuation. Altimeter, Accel and Khosla Ventures led.

The co-founder you'll recognize is Bob McGrew, who ran research at OpenAI until 2024 and spent over a decade at Palantir before that. The others are Augustus Odena, who helped start Adept, and two former Palantir engineers, Alex Mark and Jakob Frick.

McGrew's argument goes like this. Change a product's design and a person can relearn the job by tomorrow. Updating the automation? Three to six months. Arda's AI agent is supposed to cut that way down for the engineers who set up assembly lines, and Anduril already uses its models.

The price moved fast. In March, The Wall Street Journal reported Arda was raising about $70 million at $700 million, so the valuation more than doubled in seven months. Even the lead investor, Altimeter's Apoorv Agrawal, told CNBC "the price is steep today." I respect that he said it out loud.

A Reliable Robotics Cessna Caravan coming in to land. Photo: Reliable Robotics

Reliable Robotics tacked $115 million onto its Series D. Nimble Partners led the $90 million equity piece, and Silicon Valley Bank lent the remaining $25 million. That's enough to get it past a $1 billion valuation, per TechCrunch. It's raised $380 million in total.

CEO Robert Rose used to run flight software at SpaceX, and CTO Juerg Frefel spent nearly a decade there as an engineer. Their system goes into planes that already exist and handles everything from engine start to taxi, takeoff and landing. For now, a pilot stays on board.

They even run their own airline to prove it. Reliable Airlines flies cargo out of Albuquerque with six Cessna Caravans, six days a week.

The catch is the FAA. Rose expects the first certification in 18 to 24 months, and flying with nobody on board is at least three years away. So you're paying $1 billion for a company whose timeline is set by a regulator.

Town gives every employee an AI assistant called a Townie. Image: Town

Town raised a $108 million Series B co-led by Forerunner and Menlo Ventures, with Andreessen Horowitz, Serena Ventures and First Round joining. TechCrunch says the round makes it a unicorn. Its $55 million Series A was back in June.

Every employee gets an AI assistant called a "Townie" that plugs into email, calendars and other work tools. Townies can talk to each other, and now they can deal with customers too. Co-founder Jean-Denis Greze used to be Plaid's CTO.

What I'd want to see is the revenue. TechCrunch says Town hit millions in annual recurring revenue within weeks of launching, but there's no exact number. A billion-dollar price four months in is a bet on the next year, not on the last four months.

Otter.ai's meeting assistant. Image: Otter.ai

Otter.ai got $320 million from General Catalyst's Customer Value Fund. It isn't equity. TechCrunch says the fund earns its return based on how Otter's marketing spend performs, so nobody's stake gets diluted.

Otter passed $100 million in annual recurring revenue last year and says 40 million people have used it, up from 25 million. Before this it had raised only about $50 million total, according to PitchBook, and its last round was in 2021.

This is my favorite deal of the week. A company with $100 million in revenue could have sold shares at a nice price in this market. Otter picked money that only works if its customers keep paying. That's a company betting on its own numbers.

Blackwall co-founders Denis Prochko (left) and Nik Rozenberg. Photo: Blackwall

Blackwall, a security company from Estonia, raised a $100 million Series C at a $2.2 billion valuation. AVP led, and Dawn Capital, MMC Ventures and Tera Ventures came back. TechCrunch says that's four times what it was worth at its last raise in 2025.

It protects websites from bad traffic, like DDoS attacks, malicious bots and the growing flood of AI agents. It sells through hosting and cloud providers, who put their own brand on the tools and split the revenue.

The timing makes sense. More AI agents means a lot more traffic that isn't human, and somebody has to sort the good from the bad. Blackwall didn't share revenue, though, so that 4x is partly on faith.

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THE PATTERN: WHO'S CHECKING THE WORK

Six deals, and each one has a different referee.

For the companies building AI for the physical world, the referee is mostly the government. ASI has an FAA program and an Army contract. Reliable Robotics can't scale until the FAA signs off. Arda's one named customer is a defense company.

For the software companies, it's mostly the investors' own conviction. Town and Blackwall didn't share exact revenue numbers. Otter did, and it still chose money that only gets paid back from results.

The speed is wild. Arda more than doubled in seven months. Blackwall went up 4x. Town hit a billion dollars four months after launch.

The pattern: the deals with an outside referee are the easiest to check. A federal contract or an FAA certificate is public. "Millions in ARR" is not.

For investors: Don't just ask who invested.

Ask who else is checking the work.

Mason's take: Otter is the deal I keep coming back to. It has over $100 million in revenue and could have sold stock at a good price. It took money that only pays off if customers keep paying instead. The same week, a four-month-old assistant sold stock at a billion dollars. One of those companies is betting on its numbers. The other is betting on its story.

Founderscrowd Newsletter | Wednesday, October 21, 2026 | Who's checking the work

$3B for air traffic AI. $1.5B for factory AI. $320M for Otter without selling a share.