Fundraising Fox
/People
Sign in

Constantin Schreiber

Founder

Founder at Fastgen · Founder at Blair

Berlin, Berlin, Germany

FoundedBlair · YCFastgen · YC

Find your path to Constantin

Sign up to see every warm intro you have to Constantin

  • Paths you didn't know you had: your email and LinkedIn already hold routes to Constantin. We find them for you
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes that take hours to manually find through your inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Sign up with GoogleAlready have an account? Log in

About

Constantin Schreiber left college to co-found Blair, a Y Combinator-backed income-based financing platform for U.S. students that raised over $100M. He previously worked on autonomous drone projects and has experience with engineering and software systems.

Founder at FastgenYC W23

Intro paths

YC

Constantin went through Y Combinator (Winter 2023) — any YC alum in your network can reach them through the YC community.

GP

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

→

In turn, Constantin can intro founders to Fastgen's investors below.

Fastgen's investors · 13

468 CapitalBerlinAndreessen HorowitzMenlo Park · $500K – $50M checksBLN CapitalBerlin · $55K – $550K checksJames Beshara FundVeniceMaiora Rebel VenturesMischiefSan Francisco · $1M – $5M checksOrange CollectiveDanvilleRainfall VenturesSan Francisco · $100K – $1M checksRebel FundSan Francisco · $100K – $5M checksSequoia CapitalMenlo Park · $100K – $50M checksSquad Capital$110K – $550K checksWefunderSan FranciscoY CombinatorSan Francisco · $500K checks · since 2023

Co-founders at Fastgen

MMMike Mahlkow
Mike MahlkowFounder
DNDavid Nordhausen
David NordhausenFounder

Founder at BlairYC S19

Intro paths

YC

Constantin went through Y Combinator (Summer 2019) — any YC alum in your network can reach them through the YC community.

→

In turn, Constantin can intro founders to Blair's investors below.

Blair's investors · 23

468 CapitalBerlinASDF VenturesBackend CapitalSan Francisco · $100K – $10M checksBDMINew York · $500K – $5M checksBeluga CapitalBond Capital ManagementSan Francisco · $100K – $25M checks · since 2026Daft CapitalPalo Alto · $500K – $2M checksGeneral CatalystSan Francisco · $30M checks · since 2026Goldhirsch FoundationLos AngelesIndex VenturesSan Francisco · $540K – $10.8M checks · since 2026James Beshara FundVeniceLightspeed Venture PartnersMenlo Park · $1M – $5M checks · since 2026PioneerToronto, OntarioRainfall VenturesSan Francisco · $100K – $1M checksStepstone GroupCharlotte · since 2026Tiger Global ManagementNew York · $1M – $100M checksTMT InvestmentsVentureSouqAbu Dhabi · $100K – $10M checksVibe CapitalSan Francisco · $250K – $500K checksWefunderSan FranciscoWefundsCambridgeY CombinatorSan Francisco · $500K checks · since 2019ZillionizePalo Alto · $200K checks

Co-founders at Blair

MMMike Mahlkow
Mike MahlkowFounder
DNDavid Nordhausen
David NordhausenFounder

Frequently asked questions

Who is Constantin Schreiber?
Constantin Schreiber left college to co-found Blair, a Y Combinator-backed income-based financing platform for U.S. students that raised over $100M. He previously worked on autonomous drone projects and has experience with engineering and software systems.
Where does Constantin Schreiber work?
Constantin Schreiber is Founder of Blair and Founder at Fastgen.
What companies did Constantin Schreiber found?
Constantin Schreiber founded Blair, Fastgen.

Founder mafias

About this profile. Compiled from public sources — Fastgen's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights