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Rational

YC S26

San Francisco, US · Founded 2026 · 2 employees · Hiring · 4 known investors

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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 IntelligenceFinanceB2BEnterpriseUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S26)

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

JMJibril Moinuddin
Jibril MoinuddinCo-FounderJibril Moinuddin is CEO of Rational and previously founded STEMplicity Education. He attended the University of Michigan.
CXChrist Xu
Christ XuCo-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 · 4

Vela Partnerslisted by Vela PartnersSan Francisco · $100K – $500K
Andreessen HorowitzreportedMenlo Park · $500K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

Twenty Two VenturesreportedPalo Alto · $50K – $250K

How we know: Y Combinator's founder network · Not right? Tell us

Related companies · 4

TamLabsTamLabs provides AI agent teams that manage complex business workflows under user direction, handling tasks like due diligence, market sizing, and financial modeling for professional services and investment analysis.
ZalosZalos builds computer agents that automate repetitive finance operations tasks like payroll, reconciliation, and form processing within existing enterprise ERP and accounting systems, without requiring system replacement.
Alphawatch AIAlphawatch AI provides a document processing tool that lets users transform PDF and Word files while integrating data from private knowledge bases, with security controls.
ModusModus is an AI-powered sales planning and performance platform that integrates data from HRIS, ATS, Salesforce, and other sources to provide real-time sales intelligence for enterprise sales teams. The platform detects revenue gaps, ramp delays, territory misalignments, and rep underperformance while benchmarking compensation and capacity against industry data.

Companies working in the same space as Rational.

In the news

Rational: AI Employees for Accountingycombinator.com · Jul 2026

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, Vela Partners, Andreessen Horowitz, Twenty Two Ventures.
Where is Rational headquartered?
Rational is headquartered in San Francisco, US.