FullSeam
AI agents that run accounts receivable, accounts payable, cash application and reconciliation inside your existing systems.
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About FullSeam
FullSeam is an AI agent platform for corporate accounting and finance teams. Its agents connect to the ERP, billing system, accounting software and spreadsheets a team already uses and take on accounts receivable, accounts payable, cash application and reconciliation without a system migration.
The company is a Y Combinator Winter 2026 company and states SOC 2 Type 1 certification on its site. Published integrations include QuickBooks, Xero, NetSuite, Sage, BILL, Stripe, HubSpot, Salesforce and PandaDoc, and named customers include Deferred and Belfry Software. Agents surface confidence scores and reasoning for each coding or matching decision, with items routed for human review before posting.
It is positioned at in-house finance teams at growing companies that are drowning in manual AR and AP follow-up rather than at accounting practices serving many small clients.
Key Features
- Cash application that matches incoming payments to open invoices, including partial payments and splits, with reasoning shown
- Reconciliation of the general ledger against bank, card and subledger data with variances flagged for review
- Accounts payable intake, extraction and GL coding with confidence scores before posting
- Configurable rules and approval thresholds, such as auto-approving invoices under a set amount
Our in-depth review
FullSeam sells AI agents for the accounting work that happens around the edges of the accounting system: chasing customers, coding bills, applying cash and squaring the ledger to the bank.
What it does well. The four workflows it covers are genuinely the ones that eat junior finance time, and the product is built to sit on the existing stack rather than replace it, with connectors to QuickBooks, Xero, NetSuite, Sage, BILL and Stripe. Every extraction and match carries a confidence score and a stated reason, approval thresholds are configurable, and reconciliation surfaces variances rather than quietly forcing a match. SOC 2 Type 1 certification and named customers are more than most companies at this stage can show.
Where it falls short. It is very early: a Y Combinator Winter 2026 company with a handful of public references and no published pricing, so evaluation means a demo call. SOC 2 Type 1 is a point-in-time report and weaker than the Type 2 most finance buyers eventually want. The efficiency claims on the site come from customer quotes rather than independent measurement, and the design assumes an in-house finance team, so a practice managing dozens of small client files may find the model an awkward fit.
Best for. In-house finance and accounting teams at growing companies carrying heavy manual AR and AP workloads and wanting automation without a system change.
Verdict. A well-targeted set of agents for the least automatable corners of finance operations, worth a demo if your team is losing days to chasing and coding.
At a glance
- Category
- Bank reconciliation
- Best for
- 11–50 practice
- Editor's score
- 4 / 5
- Pricing
- Pricing not published; demo and custom quote only.
- Last verified
- 2026-08-08
Integrations
- QuickBooks
- Xero
- NetSuite
- Sage
- BILL
- Stripe
- HubSpot
- Salesforce
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