Rational
<!-- hacklab:yc-profile -- YC company profile First Zero-human Accounting Firm Rational is building the first accounting firm with no humans. It's entirely run by our AI employe…
About Rational
YC company profile
First Zero-human Accounting Firm
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.
- YC batch: Summer 2026
- Founded: 2026
- Team size: 2
- Location: San Francisco
- Country: US
- Status: Active
- Industry: B2B
- Stage: Early
- Tags: Finance, B2B, Enterprise, AI
- YC partner: Jared Friedman
Founders
Jibril Moinuddin — Founder/CEO
CEO at Rational. Previously founding engineer at Buckeye AI, TrueFoundry. Founded STEMplicity Education. Dropped out of University of Michigan. Non-Trivial Fellow.
Christ Xu — Founder/CTO
CTO at Rational. Prev Youngest Tencent Senior SWE. 2x IOI Camp, IMO Camp, published algo researcher.
Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.
- Forward-Deployed EngineerFull-time · On-site · San Francisco, CA, US · $120K - $200K · 0.50% - 2.00% equity
- Machine Learning Researcher Full-time · On-site · San Francisco, CA, US · $150K - $200K · 0.50% - 2.00% equity
- Software Engineering InternInternship · On-site · San Francisco, CA, US · $8K - $12K / monthly
- Applied AIFull-time · On-site · San Francisco, CA, US · $120K - $200K · 0.50% - 2.00% equity