FullSeam

FullSeam is an AI employee for finance and accounting teams.

Winter 2026ActiveB2BFinance and AccountingArtificial IntelligenceFinOpsFintechSaaS

Company

FullSeam is an AI employee for finance and accounting teams. It logs into a company's accounting, billing, banking, and CRM tools and completes routine tasks typically done manually — like accounts receivable, accounts payable, billing, and updating financial records.

Verdict

High Signal

Market Opportunity

Finance and accounting automation is a massive B2B market — AR, AP, cash application, and reconciliation collectively represent billions in labor spend across SMB and mid-market companies. Clear ICP in property/real estate and SaaS businesses. Strong monetization path as a workflow replacement tool that displaces headcount or reduces manual labor costs.

High Signal

Founder Signal

All three co-founders previously co-founded TaxProper (YC S19), a property tax SaaS that exited to Opendoor (NASDAQ: OPEN) in 2022 — this is a meaningful prior exit with real validation. Aaron Coppa was founding engineer (UIUC 2014-2018), Thomas Dowling is a Rhodes Scholar (Oxford MSc) who advised the Mayor of Chicago, and Geoff Segal co-founded the same prior company. Three-time repeat YC founders with a successful exit is a strong signal regardless of school pedigree.

Low Signal

Competition

Crowded space with well-funded direct competitors including Vic.ai, Stampli, and Tipalti on the AP side, plus Bill.com, Versapay on AR, and broader players like Brex and Ramp expanding into accounting workflows. OpenAI and major ERPs (QuickBooks, NetSuite/Oracle) are all building AI-native accounting features. Being a horizontal 'AI teammate' across all finance functions makes differentiation harder to articulate.

Medium Signal

Product

Live product UI shown with detailed AP invoice processing, GL coding, AR collections, cash application, and reconciliation workflows. Named testimonials from Judd Schoenholtz (CEO, Deferred) and Jordan Wallach (CEO, Belfry Software) indicate real paying customers. However, no specific revenue figures, ARR, or customer count metrics disclosed — 'Book a Demo' primary CTA limits evidence of scale.

OverallB Tier

Three repeat YC founders with a clean prior exit to a public company (Opendoor) is genuinely strong team signal — this isn't a first-time team figuring things out. The product looks real with working demos and named customer testimonials. The core risk is market competition: AP/AR automation is one of the most crowded spaces in fintech AI, with Stampli, Vic.ai, Tipalti, Bill.com, and even Intuit/QuickBooks all aggressively building in this direction. The 'AI employee for all of finance' positioning is broad and risks spreading thin against point-solution specialists. Traction evidence is thin publicly — named logos but no ARR, no customer count, no growth metrics. Worth watching but needs to show defensible customer concentration or workflow depth that incumbents can't easily replicate.

Active Founders

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.

Thomas Dowling

Co-founder

Tom 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. He advised the Mayor of Chicago and is currently a Commissioner of an Illinois state agency. He has a BA from UIUC and an MSc from Oxford, where he was a Rhodes Scholar.

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.

FullSeam

TierB Tier

BatchWinter 2026

Team Size3

StatusActive