
Finance
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Enterprise Accounting
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YC W26
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Valuation:
Undisclosed

Last Updated:
March 24, 2026

Builds autonomous AI agents that log into ERPs, billing systems, and banking platforms to automate end-to-end corporate accounting: invoicing, cash application, reconciliation, and vendor bill intake.
Expanding automated workflow coverage: AR, AP, cash application, reconciliation, contract reading, invoice calculation. Plug-and-play with NetSuite, SAP, QuickBooks, Sage, and CRMs. AI agents act as autonomous teammates that communicate with vendors and customers, record payments, and update financial records.
Agentic architecture with browser automation and API orchestration. Deep financial document processing expertise from TaxProper, where they processed over $1B/year in property tax payments. At TaxProper, the team experienced firsthand how accounting teams drown in invoicing, reconciliations, customer questions, and exception handling during rapid growth, directly motivating FullSeam's product. Stealth enterprise pilots likely. Seed round mid-2026.
AI agents autonomously match incoming payments to open invoices across ERPs and banking platforms, resolving discrepancies without human intervention.
An AI bot checks your bank account, figures out which customer paid which invoice, and updates your books automatically so your team doesn't have to.
It's like having a tireless intern who opens every bank notification, cross-references it against every unpaid invoice, and updates the spreadsheet before you've even finished your morning coffee.
AI agents read and interpret customer contracts to automatically calculate, generate, and post invoices aligned with revenue recognition rules.
An AI reads your customer contracts, figures out what to bill and when, creates the invoices, and posts them to your accounting system—no human calculator needed.
It's like hiring a paralegal who speed-reads every contract, a mathematician who never miscalculates a proration, and an accountant who posts the journal entry—all rolled into one AI that never takes PTO.
AI agents continuously monitor GL transactions and flag reconciliation anomalies before month-end close, predicting mismatches and suggesting corrective entries.
An AI watches every transaction flowing through your books in real time, spots anything that looks wrong before the month ends, and tells your team exactly how to fix it.
It's like having a smoke detector for your general ledger—instead of discovering the fire during month-end close, the AI smells smoke on day three and hands you the extinguisher.
All three co-founders previously co-founded TaxProper (YC S19), the leading property tax software for institutional real estate investors, which was acquired by Opendoor (NASDAQ: OPEN) for 8-figures in 2022 after processing $1B+/year in payments. Thomas Dowling is a Rhodes Scholar (Oxford MSc) who advised the Mayor of Chicago and was appointed by Illinois Governor JB Pritzker to oversee a $700M/year state agency. Aaron Coppa was the founding engineer. Geoff Segal graduated Magna Cum Laude from UIUC with Highest Distinction in Statistics.