Plural

An elite generation of founders are solving the world’s hardest problems and building the technologies that will shape Europe’s future across our most critical industries. The crux of Plural's founding thesis is starting to play out: non-obvious, hard companies matter.

Frankenburg joins UK defence leaders reinforcing Gulf air defence under Iranian attacks “We’ve put a huge amount of work into this – long hours, hard engineering, constant iteration – because our partners need a new kind of system: one that can be produced quickly, replenished continuously, and used at scale without breaking budgets when they’re under attack. That’s what we’re building together with our UK team and partners across the UK and the Middle East.” — Dan Hallett, UK Director, Frankenburg Frankenburg is part of a select group of UK defence companies working with government and regional partners to support Gulf states under sustained drone and missile attacks. Our Mark I is the world’s smallest and lowest-cost guided interceptor missile, built from commercially available components and engineered for localised, sovereign mass production. It is designed to cut intercept costs by more than tenfold and to be produced locally at the point of need. UK government press release: gov.uk/government/new… #WinTech

1. @pluralplatform is leading a $15m seed round into Augur, applying advanced AI to support national security, protect public spaces and safeguard critical national infrastructure.

Excellent analysis in @TheEconomist on why the next trillion dollar company just might come from Europe: economist.com/business/2026/…

Today we launched @CallosumAI. We are building the infrastructure where heterogeneous chips & intelligence co-evolve to solve the world's hardest problems. Today we present our first results. Across four large problem spaces, we break SOTA and deliver orders-of-magnitude improvements in capabilities, cost and speed: 12× cheaper deep context. New web SOTA with open-source, 3x cheaper and faster. 2.4× cache speedups. 1,767× faster tool calling. This is the worst our infrastructure will ever be. We do it by co-evolving heterogeneous chips and multi-agent intelligence - workflows aware of their hardware, models aware of their task graph, kernels aware of their output constraints. An Intelligent System. callosum.com/blog/welcome-h…

Through SmartCap, Estonia invests in the next generation of defence innovation. Frankenburg’s 30 million euro Series A, led by Plural and joined by SmartCap, is not just a funding round. It is a strategic signal. Security is moving fast. Standing still is not an option. In modern defence, speed, scale and affordability decide. Europe must back those who build, adapt and deliver. Estonia will continue to do so: ft.com/content/0aff10…

Today we're launching @CallosumAI out of stealth. I’m incredibly excited. We think AI & compute is about to change fundamentally. The current paradigm scaled up on an assumption that single models on identical chips would be enough. That shaped everything - models, data centres, the entire compute stack. It's taken us remarkably far. But what started as a practical bet has hardened into constraints now holding us back. The problems we need AI to solve - in science, industry, security - won't be solved by a single form of intelligence. They'll be solved by many. Intelligence is heterogeneous. Biology figured this out long ago. AI infrastructure hasn't caught up. At the same time, amazing new chips are arriving from every direction, each with radically different strengths. But every layer of the stack above them was built for homogeneity. But there is no infrastructure to compose diverse hardware and AI into Intelligent Systems that are greater than the sum of their parts. That's why Jascha Achterberg and I founded Callosum. Callosum is the Intelligent Systems Company. We are building the infrastructure where heterogeneous chips & intelligence co-evolve to solve the world's hardest problems. Our ambition is to open an entirely new paradigm, where diverse chips create algorithmic possibilities that didn't exist before, and new architectures reveal new ways to exploit the hardware. We've raised $10.25 million. Pre-seed led by @pluralplatform and @soundboy , with 22 world-class investors including @join_ef, Charlie Songhurst, @nickmckeown1, @stanboland, @LawrenceLundy & supported by @ARIA_research. We've assembled an extraordinary team. I'm in awe of the people around me every day. Read about us in @FortuneMagazine: fortune.com/2026/02/26/sta…

1/ Today, @pluralplatform is investing $10.25m into @CallosumAI, a startup building a new class of company to enable more diverse, powerful and efficient compute, unlocking entirely new kinds of AI systems and discoveries that today’s hardware paradigm will never deliver.

I find it really appropriate to announce today that @pluralplatform is leading a €30m Series A into @FrankenburgTech, along with our friends at Smartcap, to develop missile defence systems that make sense in today’s era of unmanned warfare,

Frankenburg has raised €30M in Series A funding, led by Plural @pluralplatform and joined by SmartCap. This brings the company’s total funding to €40M. Announced on the fourth anniversary of Russia’s full-scale invasion of Ukraine and the 108th anniversary of Estonia’s independence, this funding allows us to accelerate what matters most: building sovereign missile production capacity in Europe and scaling affordable, mass-manufacturable systems. We are grateful to our investors Plural and SmartCap for backing our mission to bring affordability and industrial scale to missile defence. The Financial Times @FT covered the round today as part of its reporting on Europe’s efforts to scale air defence capability. Full announcement: frankenburg.tech/frankenburg-te… The Financial Times article by @sylviapfeifer: ft.com/content/0aff10…

This is an incredibly ambitious UK company working to change the entire paradigm of inference compute. Go @jamesdacombe!

1/ Very happy to share that I’m leading @pluralplatform’s investment into @OLIXComputing as part of the $250m the company has raised, alongside our friends at @HummingbirdVC, @vertexventures, @join_ef and @localglobevc.

Europe moving faster, literally. 🚀

1/ Europe can lead in hypersonics - if it builds differently and builds faster. That’s why I led @pluralplatform’s investment into @HypersonicaGmbH’s €23 million Series A

“You just need one or two extraordinary individuals who have the talent to end up in the situation where they could build a trillion-dollar company and who are willing to keep going." @soundboy spoke to @richardtyler in @thetimes about the next generation of UK tech winners.

@soundboy @richardtyler @thetimes Read the full interview here: thetimes.com/sunday-times-1…

The future comes into focus for @richardquest @CNN: featuring Niko from @ixieyewear 👓 edition.cnn.com/2026/01/15/bus…

“We need to direct our own fate.” @torstenreil and @shashj talk about the future of war and autonomous weapons, and European sovereignty and supply chains on this week's fascinating episode of @TheEconomist's Inside Defence: economist.com/insider/inside…

A couple weeks ago, we ran our first 24h non-stop build with our robots at @BuildMonumental (maybe in the world?), running for 36 hours straight to do the brickwork for a transformer substation.