Suggest an update
YC List Summer 2026

YC S26 · Active

Rational

First Zero-human Accounting Firm

Class
Summer 2026
Status
Active
Industry
B2B
Location
San Francisco, CA, USA
Team size
2

Website

https://rational.to

About

Rational is building the first accounting firm with no humans. It's entirely run by our AI employees, who go from client intake to doing the books to filing with the IRS. We secure 90% cost reduction, 24/7 support, and an overall seamless experience for businesses.