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Plywood Rots. Supersede Extrudes Its Replacement From the Plastic Nobody Wanted.
Sean Petterson sold his last hardware company after raising more than $60 million. Now he is in Phoenix extruding recycled polypropylene into a board that boatbuilders are bolting into 2026 hulls - and he wants a micro-factory in every city with a plastic problem.
Aro Homes
Aro Homes is a Silicon Valley home-building company that designs and delivers precision-engineered, net-zero single-family homes for established neighborhoods. By combining a repeatable off-site/on-site construction system with architecture from Olson Kundig, Aro aims to cut the typical 18-month build down to roughly 90 days while producing homes that generate more energy than they use, cut water consumption by up to 45%, and save an estimated 11.2 tons of CO2 per home each year. The company launched publicly in 2022 with a $21M Series A and treats housing as a repeatable product rather than a series of one-off custom builds.
Verustruct
Verustruct is a New Haven-based construction-technology company building a gantry-less 3D printing system to make affordable, sustainable housing at scale. Founded by former SpaceX engineer Nick Callegari, its patent-pending translational slipform printer extrudes load-bearing walls with embedded mechanical, electrical, and plumbing systems, then scales itself up layer by layer, sidestepping the bulky gantry frames that cap the size of most additive-construction projects. Organized as a public benefit corporation, Verustruct aims to cut home construction cost by roughly half and emissions by around 40 percent.
Rentberry
Rentberry is a San Francisco-based proptech company building an end-to-end, AI-powered rental ecosystem that lets tenants and landlords handle the entire rental lifecycle online - from search, virtual tours, applications and automated tenant screening, to digital lease signing, rent collection and ongoing maintenance. Founded in 2015 by Ukrainian entrepreneurs after a frustrating San Francisco apartment hunt, the platform now spans roughly 90 countries and uses AI agents to analyze listings, generate property descriptions, negotiate pricing and coordinate move-in services. The company has expanded into a chain of furnished modular homes and is preparing for a planned public listing under the NASDAQ ticker RNTB.