Fundraising Fox

Nicholas Aldridge

Founder

Co-Founder & CEO at MouseCat

New York City Metropolitan Area

FoundedMouseCat · YC

About

Nicholas Aldridge is Co-Founder and CEO of MouseCat and a maintainer of MCP. He previously served as Principal Engineer at AWS AI for 6.5 years, where he worked on Amazon Bedrock Knowledge Bases, Agents, and AgentCore, and participated on the A2A steering committee.

Co-Founder & CEO at MouseCatYC W26

Intro paths

YC

Nicholas went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Jared Friedman, YC Group Partner — the partner who ran MouseCat's batch and knows the company first-hand. YC profile ↗

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In turn, Nicholas can intro founders to MouseCat's investors below.

MouseCat's investors · 2

Imagination CapitalNew York · $100K – $150K checksY CombinatorSan Francisco · $500K checks · since 2026

Co-founders at MouseCat

JMJoseph McAllister
Joseph McAllisterCo-Founder & CTO

Experience

  1. MouseCat (YC W26)Co-Founder & CEOcurrent2026 — present
  2. Model Context ProtocolCore Maintainercurrent2025 — present
  3. Amazon Web Services (AWS)Principal Engineer2025 — 2026Seattle, WA
  4. Amazon Web Services (AWS)Senior Software Engineer2022 — 2025
  5. Amazon Web Services (AWS)Software Engineer II2020 — 2022
  6. Amazon Web Services (AWS)Software Engineer2019 — 2020
  7. Agent2AgentTechnical Steering Committee Member2025
  8. CroweData Science Intern2019
  9. fuseCEO / Co-Founder2018 — 2019
  10. XLP CapitalSoftware Engineer2017 — 2018
  11. XLP CapitalSummer Analyst2017Greater New York City Area
  12. Becker Friedman InstituteResearch Assistant2016 — 2017Greater Chicago Area
  13. Marathon Strategies LLCResearch Intern2016Greater New York City Area
  14. United States SenateIntern2014 — 2015Washington, D.C.

Skills & more

Machine Learning2Public Policy2Python (Programming Language)Public Relations4Algorithms

Languages English · French

From Nicholas's professional profile.

Frequently asked questions

Who is Nicholas Aldridge?
Nicholas Aldridge is Co-Founder and CEO of MouseCat and a maintainer of MCP. He previously served as Principal Engineer at AWS AI for 6.5 years, where he worked on Amazon Bedrock Knowledge Bases, Agents, and AgentCore, and participated on the A2A steering committee.
Where does Nicholas Aldridge work?
Nicholas Aldridge is Co-Founder & CEO of MouseCat.
What companies did Nicholas Aldridge found?
Nicholas Aldridge founded MouseCat.
Where did Nicholas Aldridge go to school?
Nicholas Aldridge studied at University of Chicago (Master's degree, Computer Science); University of Chicago (Bachelor's degree, Mathematics); The Loomis Chaffee School (High School Diploma).

Founder mafias

Y Combinator mafia9,496

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University of Chicago mafia136

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Alexis BorisyBachelor's degreeFounded Foundation Medicine +2Bobby PittmanMaster's degreeFounded Oathafrica +2Sean HarperABFounded TransFS +2Bharat KilaruBachelor of Arts (BA)Founded Verano Health +2James Peyer, PhDBachelor of Arts (B.A.)Founded Rapalogix Health +2Matt KrisiloffFounded Preventive +1

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The Loomis Chaffee School mafia6

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Jason H. KarpFounded Humanco +1Andrew McCormackHigh School degreeFounded PayPalBryan ChungFounded InsurfHarry StatterFounded FrontlinewildfireJoshua PendrickFounded Rypplzz

Same school

Also attended University of Chicago474

Mark SusterManaging Partner at Upfront VenturesShardul ShahInvestor at Index VenturesSam BlackmanEntrepreneur in Residence at GV (Google Ventures)Clay FisherInvestor at Spark CapitalRolanda FuInvestor at Madrona Venture GroupJonas CiplickasPrincipal at Scale Venture Partners

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Also attended The Loomis Chaffee School21

Carley PhillipsPrincipal at GreycroftJason MorrisVice President, Investor Relations at Sapphire VenturesPax AnthosChief Technology Officer at XRCJay H. KimPartner at Black Jays VenturesAdrienne HendersonSenior Investment Associate at Quona CapitalStephen FrangionePartner and Chief Operating Officer at RueOne Investments

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Shared employers

Also worked at MouseCat (YC W26)1

Joseph McAllisterCo-Founder & CTO at MouseCat

Also worked at XLP Capital3

Jeff BaiVice President at Rubicon Technology PartnersPhillip HuangFounder at DreamRPBobby HallyVice President at North Castle Partners

Also worked at Becker Friedman Institute2

Emily BallingerAssociate at Bain Capital Tech OpportunitiesDouglas SolbergFounder at Zaplar

Also worked at United States Senate124

Matt GersonInvestor at RevolutionMichelle FangResident at Lux CapitalMatt BolanderBusiness Operations Associate at QED InvestorsNick GasbarroChief of Staff at QED InvestorsLuc Ryan-SchreiberPrincipal at AlleyCorpDominique LittleGovernment Affairs Lead at Paradigm

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