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B2B/Finance and Accounting·Winter 2026
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FullSeam

FullSeam is an AI employee for finance and accounting teams.

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Overview

One-liner
FullSeam is an AI employee for finance and accounting teams.
Investors
Y Combinator, Velocity Catalyst Fund
Funding round
Seed
Funding notes

Velocity Catalyst investment thesis confirmed Velocity Catalyst Fund as investor. Targeting ~$5M raise; total not yet fully confirmed.

Funding source
https://velocitycatalyst.com/portfolio/fullseam

Why it's interesting

Market trends shaping FullSeam

  • 1AI agents eating bookkeeping, AP/AR, and month-close workflows
  • 2Spend-management category consolidating around Brex/Ramp/Mercury
  • 3Embedded accounting in vertical SaaS replacing QuickBooks for SMBs
  • 4FP&A and treasury the next wave after AP/AR automation matured
  • 5Audit tech finally moving the Big Four off Excel sampling
  • 6Real-time financial close becoming the new enterprise benchmark
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