WithAI YC Application

Spring 2026Active

WithAI went through Y Combinator in the Spring 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: Spring 2026
Industry: B2B
Team size: 3
Status: Active
Launched: 2026

Founders

Benjamin FinchFounder
Ian McInnisFounder

What WithAI does

WithAI helps institutional investors research stocks and manage their portfolios. We're live with four hedge funds, and our users spend 5+ hours a day in the platform. Investors who try "nearly every tool on the market," to quote a client of ours, "wind up with an unwieldy collection of fragmented point solutions." Those who focus on building a great setup with general agents are instead "signing up for a full-time job." So we deploy a platform called Multiplier that unifies structured data, unstructured data, AI work, human work, and tacit firm knowledge in one secure, governed, customized application. Our first vertical: independent equity funds with $250M-$5B of assets. They know AI is essential for staying relevant, but they don't have the time or talent to figure out what to do about it. But once we deploy Multiplier - - "We used to spend 80% of our time gathering information and 20% of our time acting on it," said one customer. "WithAI has flipped those percentages."

WithAI's YC application, reconstructed

Y Combinator application

WithAI, Spring 2026 batch. The real form questions, answered from public data.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

WithAI

Describe what your company does in 50 characters or less.

Agent harnesses for asset managers

What is your company going to make? Please describe your product and what it does or will do.

We built Multiplier, a platform that helps institutional equity investors research stocks and manage portfolios by combining structured data, unstructured data, AI work, human workflows, and tacit firm knowledge securely and in one place. It reduces the fragmented, manual effort investors face when using multiple tools or trying to configure general AI agents themselves.

Where do you live now, and where would the company be based after YC?

We live in New York City and the company would remain based here after YC.

Explain your decision regarding location.

New York is where our customers are, and being close to asset managers helps us iterate quickly and build trust with users who rely on us for daily research.

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.

See full application

Frequently Asked Questions

Is this the real WithAI YC application?

No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from WithAI's public data (launch notes, founder backgrounds, product description). It shows how a company like WithAI would present itself to YC, not the text they submitted.