Rational YC Application
San Francisco
Rational went through Y Combinator in the Summer 2026 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.
- YC batch
- Summer 2026
- Industry
- B2BOperations
- Location
- San Francisco
- Team size
- 2
- Status
- Active
- Launched
- 2026
Founders
Jibril MoinuddinFounder/CEO
Christ XuFounder/CTO
What Rational does
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.
Rational's YC application, reconstructed
Y Combinator application
Rational, Summer 2026 batch. The real form questions, answered from public data.
- Founders2
- Company7
- Progress7
- Idea4
- Equity3
- Curious2
- Batch Preference1
Company
Rational
First Zero-human Accounting Firm.
We are building Rational, an AI-powered accounting firm with no human accountants involved. Our AI handles everything from new client intake, to bookkeeping, to IRS filings. Clients interact directly with our AI employees and get 24/7 support, faster turnaround, and costs far lower than traditional firms.
San Francisco, CA, USA. The company will stay based in San Francisco after YC.
San Francisco is where both founders are based and where most of our early customers are. There is a big pool of B2B and tech-forward clients here, which helps us iterate fast.
21 more answers in the full application
Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.
Frequently Asked Questions
Is this the real Rational YC application?
No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Rational's public data (launch notes, founder backgrounds, product description). It shows how a company like Rational would present itself to YC, not the text they submitted.
What YC batch was Rational in?
Rational was part of the Y Combinator Summer 2026 batch.
Who founded Rational?
Rational was founded by Jibril Moinuddin, Christ Xu.
What does Rational do?
First Zero-human Accounting Firm
How do I read the full reconstructed application?
Create a free Round Funded account. The full 26-answer version of Rational's application, and every other YC batch, is in YC Insights.
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