Isembard raises $50m Series A to open 25 AI-powered factories serving aerospace and defense

Isembard raised $50 million in Series A funding, less than 12 months after its Seed round. The capital will accelerate the company’s plan to open 25 factories by the end of 2026, expand its engineering teams while launching into Germany, France and Ukraine.

The round was led by Union Square Ventures, an early backer of Twitter, Coinbase, Etsy, Abridge and Twilio. New investors Tamarack Global and IQ Capital joined the round alongside existing investors Notion Capital and CIV. Angel investors include Alex Bouaziz (Founder and CEO of Deel), Andrei Danescu (Founder and CEO of Dexory Robotics) and Matt Briers (former CFO of Wise).

Component manufacturing is a market worth $1.8 trillion a year. Yet small businesses account for 95% of production and they are rapidly disappearing. The average owner is over 65 years old and 40% plan to retire within five years. This erosion of industrial capacity is colliding with surging demand from aerospace, defense, energy and robotics companies given re-shoring and spending increases on critical industries. Without decisive action, the widening gap between supply of factories and demand from customers risks hollowing out the industrial base of Europe and North America.

Isembard manufactures high-precision components for many of the world’s most demanding customers. The company operates its own and franchisee factories, differentiated by its proprietary software and AI system, MasonOS, which runs them. MasonOS integrates quoting, scheduling, supply chain, manufacturing, quality control and delivery into a single intelligent agentic operating layer, automating and continuously optimizing factory performance.

The company identifies exceptional operators - from manufacturing, the military, franchising and the wider economy - and equips them with its technology, brand, engineering standards and access to customer demand. Franchisees can launch new Isembard factories from the ground up or convert existing businesses into an Isembard factory. This approach enables rapid expansion of high-quality manufacturing capacity while preserving local ownership and strengthening sovereign industrial capability across the United Kingdom, United States and Europe.

“Manufacturing is the origin of our security, prosperity and sense of purpose as nations,” says Alexander Fitzgerald, founder and CEO of Isembard. “This Series A enables us to open more factories, invest in MasonOS, support exceptional franchisees and recruit the best engineers across Europe and the United States. Our mission is to forge industrial acceleration.”

“Isembard is redefining the process of owning and running a factory,” says Rebecca Kaden, managing partner at Union Square Ventures. “By embedding deep operational expertise into an agentic OS, MasonOS lowers the barrier to operating high-performance manufacturing businesses and enables a networked, capital-efficient path to scale. At a moment when demand for advanced manufacturing is accelerating and interest in SMB ownership is rising, Isembard brings both forces together. We’re excited to partner with Alexander and his team as they expand access to factory ownership and rebuild industrial capacity across the West.”