Fundraising Fox

Isaac Tolley

Founder

Founder at Juno

San Francisco, California, United States

FoundedJuno · YC

About

Isaac Tolley studied molecular biology at UCL and has worked as a neuroscience researcher at UCL. He previously founded or led protein engineering work at Mimotype and built medical chatbot systems for the NHS, roles that inform his current position as co-founder and CTO at Juno.

LinkedIn ↗X / Twitter ↗
Latest on 𝕏

Isaac Tolley @isaactolley_

people love queuing in london https://t.co/vjb89psA8f

Jul 25, 2026 · ♥ 34 · ⇄ 1

Isaac Tolley @isaactolley_

very excited to see what everyone builds on the weekend over 800 signups already! so far attendees include: - cto of europe’s fastest growing company - researchers at meta, deepmind, apple - 50+ NHS clinicians - 15+ YC founders comment below if you deserve a spot https://t.co/ZS6XrUNtMH

Jul 22, 2026 · ♥ 34 · ⇄ 3

Isaac Tolley @isaactolley_

if you're cracked, based in london, and looking for a internship please hit me up you will have the chance to work on something helping 1000s of people every single day ideally you should be obsessed with any one of: - voice ai - tokenmaxxing - mobile apps - content creation

Jul 21, 2026 · ♥ 48 · ⇄ 4

Founder at JunoYC X26

Intro paths

YC

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

GP

Their group partner at YC was David Lieb, General Partner at Y Combinator — the partner who ran Juno's batch and knows the company first-hand. YC profile ↗

→

In turn, Isaac can intro founders to Juno's investors below.

Juno's investors · 6

Ada VenturesArtesianEntrepreneur FirstLobster CapitalSterling RoadY Combinator

Co-founders at Juno

MGMarshall Gould
Marshall GouldFounder

Experience

  1. Juno (YC P26)Co-Foundercurrent2025 — presentLondon Area, United Kingdom
  2. Founders, Inc.Fellow2026
  3. Mimotype Technologies GmbHFounder's Associate2025
  4. SharedGenesCo-Founder2025
  5. Innovation ForumProject Manager2024 — 2025
  6. BrightdaleFellow2024 — 2025Berlin, Germany
  7. PutnamSummer Associate Consultant2024
  8. GSKResidential Biologist2023
  9. Windrose Consulting GroupLife Sciences Analyst2023Greater London, England, United Kingdom
  10. UCLResearcher2022Greater London, England, United Kingdom
  11. iGEMProject Lead2019 — 2020
  12. UK Dementia Research InstituteResearcher2020

Education

  1. Y Combinator
  2. UCLMSc, Bioscience Innovation and Enterprise
  3. UCLBSc, Biochemistry (Molecular Biology)
  4. City of London School

Skills & more

  • Grade 8 Violin — ABRSM

From Isaac's professional profile.

Same school

Also attended Y Combinator2,000

Akshat GoenkaInvestor at Moonfire VenturesJon XuGeneral Partner at Y CombinatorTed ChaiAssociate at Scale Venture PartnersLeo LuInvestor at Foundation CapitalMaroof AhmedFounder at Octopus VenturesYusuf SherwaniCo-Founder and CEO at Pelago; a Londoner living in New York City

+ 1,994 more

Also attended UCL344

André DuboisInvestor at Index VenturesFrédérique DameInvestor at GV (Google Ventures)Jonas VetterleInvestor at Moonfire VenturesMarie FerriInvestor at DaphniElena PantaziPartner & Head of Platform at NorthzoneGiovanni MariggiInvestor at Medicxi

+ 338 more

Also attended City of London School5

Reid JacksonInvestor at Luminar VenturesTim LevenePartner and CEO at Augmentum FintechAdam GrossmanPartner at Amulet Capital Partners, LPRoy ToriSenior Analyst at One PeakHarry CheslawFounder at Autone

Shared employers

Also worked at Juno (YC P26)1

Marshall GouldFounder at Juno

Also worked at SharedGenes1

Marshall GouldFounder at Juno

Also worked at Putnam12

Elena VibochManaging Director at General CatalystKathryn ReddyPrincipal at .406 VenturesJake BauerVenture Partner at ARCH Venture PartnersPeter EmighFounder & President, Savoy Life at Red Cell IncubationAnson MacKinneySenior Associate — Ventures at Energize VenturesMaren BannonCo-Founder and Managing Partner at January Ventures

+ 6 more

Also worked at GSK111

Sam BlackmanEntrepreneur in Residence at GV (Google Ventures)Victoria TaylorInvestor at MedicxiErin MooreInvestor at Third Rock VenturesJeb KeiperInvestor at Third Rock VenturesJane SuhPrincipal on the AlleyCorp Healthcare teamCarol SuhPartner at ARCH Venture Partners

+ 105 more