Where does Maddie Hall work?

Maddie Hall is Founder of Living Carbon.

What check size does Maddie Hall write?

Maddie Hall typically writes checks of $10K – $100K.

What companies did Maddie Hall found?

Maddie Hall founded Living Carbon.

What companies has Maddie Hall invested in?

Investments tracked here include Evergrow, Ramen VR.

Where did Maddie Hall go to school?

Maddie Hall studied at Claremont McKenna College (Bachelors of Science).

Maddie Hall

InvestorFounder

Founder at Living Carbon · Former Product at First Round Capital

San Francisco, California

Writes $10K – $100K checks · typically $50K

FoundedLiving Carbon · YC

30 Under 30 2021 · Science

Find your path to Maddie

11,853 people in our graph can introduce you to Maddie.

Each arrow is one introduction. Sign up to fill in the first one.

Ask Lisa Coca to introduce you to Maddie

You →Lisa · together at Living Carbon (2025–2026) →Maddie

Ask Jamie Chen to introduce you to Maddie

You →Jamie · 3 people · together at Zenefits →Maddie

Ask Sam Okafor to introduce you to Maddie

You →Sam · 8 people · together at YC W20 →Maddie

Your email: the people you already email who know Maddie
2nd- and 3rd-degree connections: people you know who worked, studied or invested with Maddie
Your LinkedIn: the connections who can make the intro for you

We rank every route by how warm it is, so you raise on warm intros instead of cold emails.

About

Maddie Hall is chief of staff at OpenAI and an angel investor in deep tech startups. Her early investments include Lithos Carbon, Remora, Sylvera and Hadrian.

Founder at Living Carbon YC W20

Intro paths

Maddie went through Y Combinator (Winter 2020) — any YC alum in your network can reach them through the YC community.

Their group partner at YC was Gustaf Alstromer, General Partner at Y Combinator — the partner who ran Living Carbon's batch and knows the company first-hand. YC profile ↗

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In turn, Maddie can intro founders to Living Carbon's investors below.

Living Carbon's investors · 34

Agrolimen Ventures ARPA-Esince 2021 B37 VenturesSan Francisco · $100K – $3M checks C3 VenturesLos Angeles Capital B Private Holdings Climate CapitalMenlo Park · $25K – $250K checks Congruent VenturesSan Francisco · $100K – $5M checks Darco CapitalPhiladelphia Day One VenturesSan Francisco · $100K – $5M checks EQT VenturesLuxembourg · $2M – $50M checks Felicis VenturesSan Francisco · $500K – $15M checks · since 2023 Firebrand VenturesBoulder · $500K – $1M checks FloodgateMenlo Park · $500K – $5M checks Flourish VenturesSan Francisco · $100K – $5M checks HomebrewBurlingame · $100K – $500K checks JuniperClarksville · $100K – $1.5M checks Liquid VenturesSan Francisco · $250K – $5M checks Lowercarbon CapitalLos Angeles · $100K – $5M checks · since 2023 Lowercase CapitalJackson MetaplanetTallinn · $500K – $10M checks Peterson Venture PartnersSalt Lake City · $5M – $25M checks Polymath Capital Partners Prelude VenturesSan Francisco · $100K – $5M checks Sam Altman Seven Seven SixPalm Beach Gardens · $500K – $5M checks Shrug CapitalSunnyvale · $100K – $3M checks Soma CapitalSacramento · $100K – $300K checks South Quad StoryHouseSisters TemasekSingapore · since 2023 Toyota VenturesLos Altos · since 2023 Valor VenturesSouth · $500K – $3M checks Village GlobalCovina · $500K – $3M checks Y CombinatorSan Francisco · $500K checks · since 2020

Experience

Living CarbonCo-Founder & CEOcurrent2019 — presentSan Francisco Bay Area
Sequoia CapitalScout2019 — 2023San Francisco, California
Y CombinatorSpecial Projects (YC 120)2018 — 2019San Francisco Bay Area
OpenAISpecial Projects2017 — 2019
First Round CapitalProduct2016 — 2018San Francisco Bay Area
ZenefitsProduct Manager2015 — 2016San Francisco Bay Area
ZenefitsSenior Product Ops. Analyst2015San Francisco Bay Area
ZenefitsProduct Ops. Analyst2014 — 2015San Francisco Bay Area
Zillow.comProduct Management and Marketing Intern2012 — 2013Greater Seattle Area

Skills & more

Microsoft Office24PowerPoint9Microsoft Excel10Microsoft PowerPoint4WordPress2HTML2SQL2JIRA2Adobe Creative Suite2Cascading Style Sheets (CSS)2Program Development15Program Management11

+12 more

ResearchNonprofitsQualitative ResearchCommunity OutreachProduct ManagementEditingPoliticsEvent ManagementPublic PolicyPolicy AnalysisSketch AppPublic Speaking

Languages French

From Maddie's professional profile.

Investments

Investor

EvergrowRamen VR

Per curated public sources.

Leave your own feedback

Network1

Abe YokellScout

Managing Partner and Co-Founder at Congruent Ventures

Investors connected to Maddie in public investor directories — a warm-intro map.

Frequently asked questions

Who is Maddie Hall?: Maddie Hall is chief of staff at OpenAI and an angel investor in deep tech startups. Her early investments include Lithos Carbon, Remora, Sylvera and Hadrian.
Where does Maddie Hall work?: Maddie Hall is Founder of Living Carbon.
What check size does Maddie Hall write?: Maddie Hall typically writes checks of $10K – $100K.
What companies did Maddie Hall found?: Maddie Hall founded Living Carbon.
What companies has Maddie Hall invested in?: Investments tracked here include Evergrow, Ramen VR.
Where did Maddie Hall go to school?: Maddie Hall studied at Claremont McKenna College (Bachelors of Science).