Impulse Space, a startup founded by SpaceX engine guru Tom Mueller to build highly-maneuverable spacecraft, announced a $500 million Series D this week that it will use to hire as many as 200 new employees.

The round, led by 137 Ventures and BANNER VC, with participation from Founders Fund, Lux Capital, and Linse Capital, reflects investor interest in space and defense tech as the U.S. government hurls cash at national security problems and SpaceX gears up for its IPO.

Impulse is focused on in-space mobility. The company has developed a highly maneuverable platform called Mira that is targeted at U.S. Space Force buyers. It’s also building Helios, a vehicle designed to carry satellites rapidly to high orbits after they are dropped off in space closer to Earth.

President and COO Eric Romo told TechCrunch that the new capital will help the company build and test more space vehicles and emphasized the company’s hiring plans at a time when aerospace talent is in high demand.

While the company’s software teams are adopting AI coding tools, Romo said that when it comes to solving engineering problems in the real world, deep learning models aren’t quite ready for prime time. As the 13th employee at SpaceX back in 2003, Romo’s job was creating computer simulations of the company’s engine design to assess its performance.

“I considered it success if I got within 20% of the right answer, because the simulations were just not that good,” Romo said. “They’ve improved, but they’ve not improved that much, and so there’s not really any substitute for designing the thing, analyzing the thing, building it, and then getting it on the test stand.”

Romo suspects AI tools for hardware design may be slower to arrive because the right training data is hard to find, compared to the amount of text and code available on the internet to train LLMs. “If you want to go, say, find the best designs for a turbo pump seal package in the world, you’re not going to find those online,” he points out.

Impulse started with a focus on propulsion and evolved to build spacecraft, requiring the company to add more expertise in the form of engineers who build vehicle structures and flight computers. One reason the company recently opened an office in Colorado is that aerospace talent has more options today — instead of just going to Los Angeles, engineers can find work in Seattle, Denver, or Texas.

Next up for the company is another launch of its Mira spacecraft, which made its third flight late last year. That flight wasn’t without incident — a problem with its navigation system led it to expend much of its propellant early on. Romo said the company is prepping a new Mira mission that is expected to launch before the end of the year.

As its traffic continues to climb, alternative search engine DuckDuckGo is leaning into anti-AI sentiment with the launch of new browser extensions that allow users to set its no-AI search experience, noai.duckduckgo.com, as their default search engine.

Once enabled, users will be directed to DuckDuckGo’s AI-free search page, where there are no AI-assisted answers, no chat prompts, and fewer AI images in the search results, the company claims. The extensions are currently available for Chrome and Firefox users. Meanwhile, people who have switched to the DuckDuckGo web browser already have their AI settings preserved, even if they clear their browser history.

The company says the extensions are meant to help people have a consistent AI-free search experience — something that’s harder to come by these days, especially after Google announced its AI-first revamp of its search engine at its developer conference earlier in May.

Since then, traffic to DuckDuckGo has been booming. Last week, the company noted that web visits to its no-AI search page were up nearly 30% week-over-week, and its U.S. app installs were also up 18.1% week-over-week, with U.S. iOS app installs peaking at 69.9% week-over-week growth.

Those trends followed news that Google was overhauling its search box in the biggest change to its search engine in more than 25 years. Now, instead of returning links at the top of the page, Google will favor sending users into AI-generated search overviews, which are becoming more interactive experiences capable of creating visualizations, charts, graphs, or even mini apps, as needed. Follow-up questions from AI Overviews will push users into an AI Mode chat experience. The traditional “10 blue links” that defined Google in its earlier days are more of an afterthought, appearing below all this AI-fueled productivity.

But not everyone is on board with having AI made the default, which is why some are making the move to alternative search engines like DuckDuckGo, Kagi, and others.

DuckDuckGo says traffic to its no-AI search page was up threefold on Thursday, May 28, 2026 — a new high-water mark since Google’s search announcement — and the numbers are still climbing. The growth is not coming in spurts either, the company points out. Instead, visits are averaging roughly 84% above the baseline, suggesting a more sustained shift.

In addition to the new “no AI” search Chrome and Firefox extensions, DuckDuckGo will soon update its original DuckDuckGo Privacy Essentials extensions for Chrome, Firefox, Edge, and Opera to offer controls for AI search settings, as well.

It’s worth noting that DuckDuckGo isn’t an anti-AI company. The company still offers its own AI chatbot with access to many popular models, and a subscription plan that provides access to the latest models and other tools, like a VPN service, identity theft restoration, and personal information removal services.