Sumin Wu
PM
Incoming Product Marketing @Amex, prev AI Marketing & Strategy @Verizon. Sumin’s prior experience involves co-founding and scaling Hemut (YC X25) alongside AI research for Greece’s 2025 AI national policy.
About
Pillar addresses inefficiencies in preconstruction, where contractors must analyze complex blueprints and produce accurate cost estimates under tight deadlines. Today, estimators rely on manual takeoffs and incomplete pricing data, leading to inaccurate bids and financial risk. These inefficiencies result in lost contracts or reduced margins across the industry. Pillar focuses on improving speed, accuracy, and workflow alignment in the estimation process.
Product
Pillar is a customized AI-powered copilot for preconstruction that automates material takeoffs from uploaded blueprints. It enables teams to validate quantities, reach out to vendors, and receive real-time pricing data within a single workflow. Pillar adapts to each contractor’s workflow through modular features, allowing teams to use only what they need.
Founders
Joshua Placido
Designer
Josh is a product designer building communities and experiences at a human tempo. Currently leading UI/UX design at Preface Health for 1M+ patients, working directly with founders to strengthen product direction. His experience lies at the intersection of AI, healthcare and music.
Wesley Chou
Developer
Software Engineering Intern at Tesla. Previously interned at Paramount and Sony.
Tiffanie Lim
Developer
Incoming SWE @ Snap Inc. Experience building full-stack applications and backend systems, with an interest in product-driven development.