At 26 years old, he left Blackstone to found Cadre, a financial technology platform that seeks to make the real estate market more like a stock market. Williams currently serves as CEO of Cadre and has led it through a $65 million Series C fundraising round led by Andreessen Horowitz. He has been quoted as saying “Cadre’s mission is to create a more efficient economy, where we can connect the world’s buyers and sellers in opaque assets that have been inaccessible to many.” He believes that increasing the ability of investors to participate in alternative asset classes (such as "energy, natural resources, oil, infrastructure or anything that’s historically been privately held or inaccessible") will expand the opportunity to build multi-generational wealth to many more members of the world by "giving people direct, deal-by-deal access to commercial real estate, like you would buy and sell something on Amazon." To him, that mission includes a secondary market and the ability of investors to select the deals they are most interested in, at lower cost. The Economist compared Williams' Cadre to other tools that will "make markets for all kinds of assets as liquid as the stockmarket."
