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FullSeam

AI agents for corporate accounting teams

FullSeam builds agents for corporate accounting. Our agents replace manual accounting tasks that typically happen outside of our customers’ accounting software, like accounts payable, accounts receivable, and reconciliation.
Active Founders
Thomas Dowling
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.
Aaron Coppa
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
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.
Company Launches
FullSeam: Your AI-powered finance and accounting teammate
See original launch post

Hey everyone 👋

We’re Tom, Geoff, and Aaron, the co-founders of FullSeam.

TL;DR

FullSeam is your AI-powered finance and accounting teammate.

FullSeam agents log into a company's existing accounting tools and perform routine tasks that accounts receivable and accounts payable teams usually do by hand - like communicating with vendors and customers, recording payments, and updating financial records.

Ask: Is your accounting team doing AR and AP manually? Introduce us! Email tom@fullseam.com or book a demo here.

We’re also helping customers with cash application, reconciliation, and more. Feel free to reach out if your team is doing a process manually that you think could be automated!

https://www.youtube.com/watch?v=-mtzIp6MhFE

👫 Our story

We’re the same team that founded TaxProper, our first YC-backed company. At TaxProper, we paid more than a $1 billion a year in property tax payments for our customers until we were successfully acquired by Opendoor.

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We started FullSeam because we lived this pain ourselves.

At TaxProper, we were growing quickly — but our accounting team was drowning in invoicing, reconciliations, customer questions, and exception handling. The software we used kept records, but it didn’t do the work. Humans still had to chase emails, upload documents, correct entries, and follow up until payment landed.

We realized accounting teams don’t need another dashboard — they need teammates.

How it works

FullSeam's AI agents plug into your ERP, billing system, and spreadsheets and take over repetitive, error-prone accounting and finance work – without changing how your team operates.

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For accounts receivable teams, FullSeam:

  • Follows up with customers until payment is received
  • Produces requested documentation
  • Enters invoices and updates directly into customer AP portals

For accounts payable teams, FullSeam:

  • Ingests invoices from email, portals, and PDFs
    Matches invoices to POs, contracts, and proof of service
  • Follows up with vendors when information is missing
  • Categorizes expenses, pushing clean entries into your GL

Ask

Is your accounting team doing AR and AP manually? Introduce us! Email tom@fullseam.com or book a demo here.

We’re also helping customers with cash application, reconciliation, and more. Feel free to reach out if your team is doing a process manually that you think could be automated!

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FullSeam
Founded:2026
Batch:Winter 2026
Team Size:3
Status:
Active
Primary Partner:Brad Flora