UK manufacturing startup StirLight has raised £1.25 million to speed the rollout of its friction stir welding quality-assurance technology, sharpening its focus on industrial-scale production. The North Derbyshire company plans to use the funding to commercialise StirSense, a monitoring platform built to verify weld integrity in real time rather than only after a part has been completed. That pitch addresses one of the main barriers to broader friction stir welding adoption in sectors where performance, traceability and repeatability matter most.
Funding Round
The financing includes more than £750,000 in pre-seed investment from Haatch Ventures, the British Business Bank, D2N2 and angel investors, together with about £500,000 in grant support from Innovate UK and the Aerospace Technology Institute across two research and development programmes. Company statements and adviser disclosures say the capital will fund pilot deployments with industrial partners, continued product development and new hiring across technical roles. The raise gives StirLight added capacity to move from early commercial traction into a more formal scale-up phase.
Market Position
StirLight has been trading since March 2024 and has already generated revenue through friction stir welding services and contract manufacturing for customers in aerospace, automotive and nuclear markets. On its website, the company describes itself as an engineering-led business that helps customers move from research and process development into prototype and pilot-scale production. That operating model gives StirLight a practical test bed for its software and sensing tools while also placing it close to manufacturers that may eventually adopt the technology in full production lines.
Technology Focus
Friction stir welding is a solid-state process used to join metals without melting them, allowing manufacturers to produce strong, lightweight and consistent welds with lower energy use and without filler materials or shielding gas. Even with those advantages, the method has often required post-weld inspection to confirm quality, which adds cost and slows decision-making on the shop floor. StirSense is intended to close that gap by collecting process data during welding, identifying anomalies in real time and creating a traceable quality record for each joint.
Leadership and Expansion
The company is led by co-founders Toby Savage-Yu, Dr Jeroen De Backer and Dan Lord, whose backgrounds combine commercial development, friction stir welding research and industrial intellectual property. StirLight says it is already conducting pilot deployments with selected partners and is looking for additional collaborations in aerospace, automotive, defence and energy. It also expects the new funding to support recruitment in engineering and data science as the business develops the next stage of its platform.
StirLight’s announcement stands out less for the size of the round than for the manufacturing bottleneck it is trying to solve. By targeting in-process verification rather than relying solely on inspection after welding is finished, the company is making a case that better production data can unlock wider industrial use of friction stir welding. The next milestone will be whether current pilot programmes convert into repeat manufacturing contracts and establish StirSense as part of the qualification workflow for critical welded components.