YCS26ยท AIRational
First Zero-human Accounting Firm
Founders
- Jibril MoinuddinFounder/CEO
- Christ XuFounder/CTO
Same space
Competitors
Closest in what they build, same category.
ModernbancW20Accounting software that works for youShared: financeActive
Last Accounting CompanyS26AI-native accounting firm.Shared: financeActive
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FinlensW20AI Accounting for Founders & AccountantsShared: financeActive
Billow AI LabsS26AI-native Accounting Firm that's killing DeloitteShared: financeActive
Adjacent
Overlapping tags, a different niche.
ProcIndexS25AI-powered accounting automation for construction and manufacturingShared: financeActive
BenchmarkW23Decision infrastructure for investment firmsShared: financeActive
Blue OnionS20Financial data layer for AI-powered finance and accountingShared: financeActive
LiveFlowW21The Unified AI-ERP & FP&A PlatformShared: financeActive
VendrS19The AI negotiation agent to help you save money on SaaS.Shared: financeAcquired
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Batchmates in Summer 2026.
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Prodigy ResearchS26Training the world's best AI model for quantitative finance.Active
About Rational
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.
San Francisco, CA, USA
Rational: questions
Which YC batch was Rational in?
Rational was in Y Combinator's Summer 2026 batch (S26).
Is Rational still active?
Y Combinator lists Rational as active.
Who founded Rational?
Rational's founders, as listed on its YC page: Jibril Moinuddin (Founder/CEO), Christ Xu (Founder/CTO).
Where is Rational based?
Rational lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.