YC Spring 2026 (P26) founder

Ian McInnis

Founder of WithAI, Agent harnesses for asset managers

WithAIb2b7 public signals

Company

Ian McInnis is listed as a founder of WithAI. WithAI helps institutional investors research stocks and manage their portfolios. We're live with four hedge funds, and our users spend 4+ 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."

Founder traction evidence

Public posts and activity attributed directly to this founder.

  1. LinkedIn

    Ian McInnis LinkedIn post about WithAI

    WithAI YC P26 is joining Y Combinator Founder says WithAI is joining Y Combinator. Post says the company provides a platform for DevOps and platform teams to automate scripts, infrastructure, and incidents. Public LinkedIn page shows 66 reactions and 18 comments.

  2. X

    going to Mongolia in September with my glorious co-founder. Mongolian moots hmu. if i have no other Mongolian moots, fuck!

    going to Mongolia in September with my glorious co-founder. Mongolian moots hmu. if i have no other Mongolian moots, fuck!

  3. X

    the Aside browser really is that good, btw. An obsessive, technical team with strong design convictions rebuilt much of Chromium + built ...

    the Aside browser really is that good, btw. An obsessive, technical team with strong design convictions rebuilt much of Chromium + built a faster, more reliable, less obvious harness for AI browser use + got it to manage permissions well

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    Fun to read this as high discount rate behavior from GOOG here. Frankly, I'm a little surprised it didn't happen when actual underlying i...

    Fun to read this as high discount rate behavior from GOOG here. Frankly, I'm a little surprised it didn't happen when actual underlying interest rates went up. Bondholders, take note of the new insider opinion on cost of capital...

  5. X

    i <3 software

    i <3 software

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    "$3M Revenue/funding"

    "$3M Revenue/funding"

  7. X

    (i also honor mind-changing in other directions and for other reasons)

    (i also honor mind-changing in other directions and for other reasons)