FullSeam

AI agents for corporate accounting teams

2.1Score#677 of 999 agents#17 of 22 in Bookkeeper and accountant

Why it ranks #677

FullSeam, an AI bookkeeper and accountant from YC W26, ranks #677 of 999 AI agents and #17 of 22 in Bookkeeper and accountant, with a score of 2.1 of 10. Data as of 3 Oct 2026.

The score adds four parts, each 0 to 10, by weight. Every point comes from public evidence. How scoring works ·

Proof 0 × 30% 0.0
Scale 2 × 30% 0.6
Momentum 1 × 25% 0.3
Autonomy 8 × 15% 1.2
= 2.1

Proof
Do customers use it? 30% of the score
0
No public claims of customers or revenue yet.
Not found: revenue or growth (+4), named customers (+3), a customer result (+2), a customer count (+2), work done at scale (+2)
Scale
Is there a real company behind it? 30% of the score
2
3 people.
- +2
  3 people on its YC page3 or 4 people
Not found: funding round in its news (+3)
Momentum
Is it shipping and growing now? 25% of the score
1
Shows a new batch.
- +1
  New: YC Winter 2026
Not found: launch YC post in the last 6 months (+3), open roles on YC (+2), new traction claim in the last 6 months (+2), funding news in the last year (+2)
Autonomy
How much of the job does it do on its own? 15% of the score
8
Autonomous worker: completes whole tasks; people handle exceptions.
- +8
  Level 3 of 4: Autonomous workerCompletes whole tasks; people handle exceptions.
What the model read
- Acts in other systems: 95% likely
- Finishes whole tasks: 50% likely
- Calls itself an agent: 98% likely
Level 3: Completes whole tasks; people handle exceptions.

About FullSeam

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.