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Rational

YC S26

San Francisco, US · Founded 2026 · 2 employees · 1 known investors

Rational provides AI agents that automate recurring accounts payable, close coordination, reconciliation, and document management tasks for finance teams, while keeping approvals and final decisions with human staff.

AI & Machine LearningEnterprise SoftwareFintechSaaSArtificial IntelligenceEnterpriseUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S26)

Rational was founded in 2026 by Jibril Moinuddin and Christ Xu.

JMJibril Moinuddin
Jibril Moinuddinin𝕏Co-FounderJibril Moinuddin is CEO of Rational and previously founded STEMplicity Education. He attended the University of Michigan.
CXChrist Xu
Christ XuinCo-FounderChrist Xu is a CTO at Rational who previously served as a Senior Software Engineer at Tencent and held roles as an ML Engineer at Jane Street and Software Engineer intern at OpenAI. He has a background in competitive mathematics and algorithm research.

Investors · 1

Y Combinator✓ verifiedSan Francisco · $500K

In the news

Rational: AI Employees for Accountingycombinator.com · Jul 2026UBS upgrades Rational AG to “buy,” raises PT to €785 on improving growth outlook By Investing.cominvesting.com · Dec 2025Rational Funds Introduces the Rational/ReSolve Adaptive Asset Allocation Fund | Rational Fundsrationalmf.com · Mar 2018Login | Rational Fundsrationalmf.com · Dec 2017Alternative Investment Firm | Rational Fundsrationalmf.com · Nov 2017

Frequently asked questions

What does Rational do?
Rational provides AI agents that automate recurring accounts payable, close coordination, reconciliation, and document management tasks for finance teams, while keeping approvals and final decisions with human staff.
Who founded Rational?
Rational was founded by Jibril Moinuddin, Christ Xu in 2026.
Who are Rational's investors?
Rational's investors include Y Combinator.
Where is Rational headquartered?
Rational is headquartered in San Francisco, US.