Geoff Segal is Co-Founder of FullSeam, an AI employee for finance and accounting teams that automates accounts receivable, accounts payable, billing, and financial records.

Geoff studied Statistics and Economics at the University of Illinois Urbana-Champaign, graduating Magna Cum Laude with Highest Distinction in Statistics. He previously worked as an actuarial statistician and research analyst at State Farm.

Geoff co-founded TaxProper, a property tax management platform for institutional real estate investors, which successfully exited to Opendoor in 2022. He is a Y Combinator alumni, having participated in both the S19 (TaxProper) and W26 (FullSeam) batches.

FullSeam is part of Y Combinator's Winter 2026 batch and automates routine finance tasks by logging into accounting, billing, banking, and CRM tools. TaxProper raised $2M in seed funding led by Khosla Ventures and saved customers an average of $700 in property taxes.

TaxProper became the leading property tax software for institutional real estate investors before its acquisition by Opendoor, a publicly traded company. FullSeam is building AI automation technology for the $900B accounting labor market.