Billow AI Labs

AI-native Accounting Firm that's killing Deloitte

2.2Score#643 of 999 agents#16 of 22 in Bookkeeper and accountant

Why it ranks #643

Billow AI Labs, an AI bookkeeper and accountant from YC S26, ranks #643 of 999 AI agents and #16 of 22 in Bookkeeper and accountant, with a score of 2.2 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 0 × 30% 0.0
Momentum 4 × 25% 1.0
Autonomy 8 × 15% 1.2
= 2.2

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
0
Team size and funding not listed.
Not found: funding round in its news (+3)
Momentum
Is it shipping and growing now? 25% of the score
4
Shows a recent launch and a new batch.
- +3
  Launched in the last 6 monthsBillow - Killing Deloitte with AILaunch YC post · 13 Aug 2026
- +1
  New: YC Summer 2026
Not found: 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: 80% likely
- Finishes whole tasks: 68% likely
- Calls itself an agent: 96% likely
- An AI-native service: it sells the finished work, so it counts as an agent at any level
Level 3: Completes whole tasks; people handle exceptions.

About Billow AI Labs

Billow handles the work of Accounting and FP&A FTEs keeping teams compliant and audit-ready. We work within existing stacks (NetSuite, Coupa, and 80+ other systems) and complex spreadsheets, chasing down information and coordinating approvals across stakeholders.

Built by repeat founders; Joan built and exited an accounting/ERP platform (45,000 businesses in 4 years) and Phil built Bloomberg's financial “brain” data infrastructure, and as CTO of a trading platform ($1B in volume). Advisors include CFOs, controllers, auditors from publicly-traded biopharma, and a Big-4 Accounting firm.