Flux raises $37M to expand AI hardware design platform; 8VC leads $27M Series B

SAN FRANCISCO — Flux, an AI-powered platform for hardware design, announced $37 million in new investment on Feb. 27, 2026. The round includes a $27 million Series B led by 8VC, with participation from existing investors Bain Capital Ventures, Liquid 2 Ventures, and Outsiders Fund.

Flux also disclosed a previously unannounced $10 million Series A led by Outsiders Fund and co-led by Bain Capital Ventures. Flux describes its product as an AI hardware engineer trained on hundreds of thousands of real-world designs and fine-tuned for common design tasks.

According to the company, users can prompt the system in natural language to plan circuit-board layouts, source components, and test designs, all in a web browser. The platform outputs files needed for manufacturing and can suggest ways to lower costs and mitigate supply-chain risks.

More than 1 million makers, designers, and entrepreneurs have used Flux to design nearly 6.5 million devices, the company said, citing projects ranging from wearables and robots to smart-home controllers and drone navigation systems. One customer built an IoT device to extract data from construction machinery without hiring an electrical engineer, according to Flux.

The company also points to users designing and shipping electronics across Africa and building IoT-enabled organ-on-chip platforms for drug discovery. “With Flux, you can have a brilliant idea one day and hold the finished product in your hand a few weeks later,” said Flux CEO Matthias Wagner.

8VC partner Francisco Gimenez said the firm backed Flux at the idea stage and is renewing support with the Series B. “We wrote Flux’s first check when they were only a few founders with an audacious vision to transform hardware design,” he said. “Seven years later, they’re redefining who can build electronic hardware.

We’re privileged to renew our support.” Flux plans to use the new capital to extend its AI to more complex electronic use cases. “Historically, building hardware has been insanely difficult,” Wagner said, arguing that lower design costs can open the field to more creators and niche applications.

“The electronics business has always been structured around giant manufacturers. Now, for the first time, Flux puts creators at the center.”