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Grant Demaree

InvestorUnicorn founder

Founder at Onebrief · Portfolio Company at Alchemist Accelerator

San Francisco Bay Area

FoundedOnebrief$2.1B · YC

Find your path to Grant

1,007 people in our graph share verified history with Grant — schools, employers, funds. One of them is your warm intro.

Paul KwanunlockedGrant: together at Onebrief (2025–2026)
Grant: together at Alchemist Accelerator
×9Grant: together at Y Combinator
Grant: together at United States Military Academy at West Point

About

Grant Demaree is a West Point graduate with degrees in Nuclear Engineering and International Relations who served five years as an Army officer, including deployments supporting counter-epidemic and counterterrorism operations, before co-founding Onebrief.

Founder at OnebriefYC S21

Intro paths

YC

Grant went through Y Combinator (Summer 2021) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Brad Flora, Backing expeditions into the future — the partner who ran Onebrief's batch and knows the company first-hand. YC profile ↗

→

In turn, Grant can intro founders to Onebrief's investors below.

Onebrief's investors · 18

9Yards CapitalNew York · $100K – $10M checks · since 2025Alchemist AcceleratorSan Francisco · $30K checksAnorak VenturesLos Angeles · $25K – $400K checksBattery VenturesBoston · $500K – $100M checks · since 2026Caffeinated CapitalSan Francisco · $3M – $50M checks · since 2026General CatalystSan Francisco · $30M checks · since 2024Human CapitalSan Francisco · $250K – $200M checks · since 2025Insight PartnersNew York · $120M – $350M checks · since 2026Kyber Knight CapitalSan FranciscoPROOFArlingtonSalesforce VenturesSan Francisco · $5M – $50M checks · since 2026Sapphire VenturesMenlo Park · $5M – $20M checks · since 2026Signia Venture PartnersMenlo Park · $500K – $2M checksSummit Peak InvestmentsFort WorthU.S. Air Forcesince 2019U.S. Navysince 2023Visary CapitalSyossetY CombinatorSan Francisco · $500K checks · since 2021

Co-founders at Onebrief

RPRafa Pereira
Rafa PereiraFounder

Experience

  1. OnebriefCEO and co-foundercurrent2019 — presentAustin, TX
  2. Alchemist AcceleratorMentorcurrent2020 — presentSan Francisco Bay Area
  3. Alchemist AcceleratorPortfolio Companycurrent2019 — presentSan Francisco Bay Area
  4. Y CombinatorS21 Portfolio Company2021San Francisco Bay Area
  5. US ArmyTransitioning Military Officer2017 — 2018Ft Campbell, KY
  6. Combined Joint Task Force - Operation Inherent ResolvePartner Force Development Officer2016 — 2017Baghdad, Iraq
  7. 101st Airborne DivisionExecutive Officer2015 — 2016Ft Campbell, KY
  8. 101st Airborne DivisionAssistant Operations Officer2015Ft Campbell, KY
  9. Joint Task Force - United AssistanceAssistant Operations Officer2014 — 2015Monrovia, Liberia
  10. 2nd BCT, 101st Airborne DivisionBattalion Communications Officer2014Ft Campbell, KY
  11. Sandhurst CompetitionTeam Captain2012 — 2013West Point, NY
  12. Defense Threat Reduction AgencyIntern2011Wright-Patterson AFB, Ohio
  13. Boy Scouts of AmericaEagle Scout2009

Skills & more

Decision theory9Business strategy7Enterprise software9

From Grant's professional profile.

Colleagues at Alchemist Accelerator

Adam Frankl
Expert Advisory Board — Partner at Alchemist Accelerator at 33N
Agni Karmazi
Software Quality Assurance Test Engineer at Alchemist Japan
Alex Miguel
Admissions & Partnerships at Alchemist Japan
Ally Hoang
Program Associate at Alchemist Japan
Ana Rita Silva
Program Assistant at Alchemist Japan
Andrew Scheuermann
Investor at Inception Studio Capital
Annika Lauer
Director of Operations at Alchemist Japan
Bethany Gardner
Bookkeeper & Payroll Specialist at Alchemist Japan

Frequently asked questions

Who is Grant Demaree?
Grant Demaree is a West Point graduate with degrees in Nuclear Engineering and International Relations who served five years as an Army officer, including deployments supporting counter-epidemic and counterterrorism operations, before co-founding Onebrief.
Where does Grant Demaree work?
Grant Demaree is Founder of Onebrief and Portfolio Company at Alchemist Accelerator.
What companies did Grant Demaree found?
Grant Demaree founded Onebrief.
Where did Grant Demaree go to school?
Grant Demaree studied at United States Military Academy at West Point (Bachelor's Degree, International Relations); United States Military Academy at West Point (Bachelor's Degree, Nuclear Engineering); River Hill High School.

Founder mafias

River Hill High School mafia2

Also came through, then founded or led a company.

Shivum PandoveHigh School DiplomaFounded Kairos

Same school

Shared employers

Also worked at Combined Joint Task Force - Operation Inherent Resolve1

Joost DoenseAdoption Partner at Keen Venture Partners