Alloy

Alloy builds an AI prototyping tool that lets product teams create high-fidelity prototypes directly from their live web products. The team raised a $3.5M seed round led by Blackbird and Bain Capital Ventures in early 2025 and won the 2025 Proddy Award for Top Prototyping Product. Alloy differentiates by capturing real product design systems via a browser extension, eliminating the need for manual design imports or engineering setup.