FullSeam

AI agents for corporate accounting teams

Y CombinatorWinter 2026ActiveB2BFinance and Accounting

What they do

Problem

Corporate accounting teams spend significant time on manual, error-prone tasks outside their core accounting software such as payables, receivables, and reconciliations.

Solution

FullSeam provides AI agents that automate and replace manual accounting workflows like accounts payable, accounts receivable, and reconciliation alongside existing accounting systems.

Who it's for

Corporate accounting teams at companies that need to streamline AP/AR and reconciliation work.

Founders

Thomas Dowling

Co-founder

Tom is the co-founder of FullSeam (W26). FullSeam automates work for corporate accounting teams. He previously co-founded TaxProper (S19), the leading property tax software for institutional real estate investors, which was acquired by Opendoor (NASDAQ: OPEN) for 8-figures in 2022. He advised the Mayor of Chicago and was appointed by Illinois Governor JB Pritzker to oversee a $700m/year state agency. He has a BA from UIUC and an MSc from Oxford, where he was a Rhodes Scholar.

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Aaron Coppa

Co-founder

Aaron is the co-founder of FullSeam (W26), the AI employee for finance and accounting teams. He was the founding engineer at TaxProper (S19), the leading property tax software for institutional real estate investors, which successfully exited to Opendoor (NASDAQ: OPEN) in 2022.

Geoff Segal

Co-Founder

Geoff is the co-founder of FullSeam (W26), the AI employee for finance and accounting teams. He previously co-founded TaxProper (S19), the leading property tax software for institutional real estate investors, which successfully exited to Opendoor (NASDAQ: OPEN) in 2022.