crowdsourced-data
(3)
CompStak
CompStak is a New York-based commercial real estate data and analytics company that runs a crowdsourced marketplace where brokers, appraisers and researchers trade verified lease and sale comps for credits. Founded in 2012 by former broker Michael Mandel and engineer Vadim Belobrovka, it turns hard-to-find transaction details - starting rents, net effective rents, cap rates, net operating income - into structured, analyst-reviewed data used by many of the largest CRE investors, lenders and banks in the U.S.
Zach Greenberger
Zach Greenberger is the CEO of Nexar, the New York-based real-world intelligence platform building the data backbone for the Physical AI era. A self-described non-engineer who taught himself the technology, he came up through IBM, Tesla, and Lyft (where he was Chief Business Officer) before taking the top job at Nexar in September 2024. Under his watch Nexar agreed to merge with Nauto in July 2026, uniting a dataset of more than 10 billion driving miles and creating an independent platform of record for how the physical world actually behaves.
Hetal Retail
Hetal Retail is a New York-based startup that helps consumer brands see what is actually happening on store shelves. A crowdsourced network of everyday shoppers - called Hetalites - films short videos of store aisles on a mobile app, and Hetal's computer vision and AI turn that footage into planogram-compliance diagnostics, prioritized issue lists with visual proof, and correlations between shelf execution and sales. The pitch: retail-level visibility for a fraction of the cost of traditional manual audits, and a system that helps coordinate the fix rather than just flagging the problem.