Paris-Based Rayon Secures €10M Series A to Bring AI and Browser-Native Collaboration to Interior Design

For decades, interior and experiential designers have been forced to retrofit their workflows into heavy, desktop-bound CAD software designed primarily for architects and engineers. This misalignment has created a bottleneck in an industry responsible for the vast majority of construction projects, such as retail build-outs, office fit-outs, and home renovations. As a result, design teams often struggle with version control and fragmented communication across different software tools.

To address this gap, Paris-based startup Rayon has secured €10 million in Series A funding led by Partech, with participation from Northzone, Foundamental, and Seedcamp. The company provides a browser-native platform that consolidates floor plans, mood boards, specifications, and furniture schedules into a single collaborative environment. By keeping all data in one place, a specification updates automatically when a drawing changes, allowing teams to edit simultaneously and share work via a simple web link.

The new capital will fund the rollout of a 3D mode and deeper artificial intelligence integration, moving AI from generating static visual outputs to creating precise, editable drawings. With over four million drawings already created on the platform by clients like Virgin Atlantic, Rayon is positioning itself as a lighter, faster alternative to legacy giants like Autodesk and Trimble. The startup is betting that the "architecture of the 90%" requires its own dedicated operating system rather than repurposed engineering tools.