Marc Kaa Brejner
FounderFounder at Complir
Copenhagen, Capital Region of Denmark, Denmark
FoundedComplir · YC
Find your path to Marc
130 people in our graph share verified history with Marc — schools, employers, funds. One of them is your warm intro.
Lars PedersenunlockedMarc: together at DTU - Technical University of Denmark
×11Marc: together at DTU - Technical University of Denmark
About
Marc Kaa Brejner is CTO at Complir.
Founder at ComplirYC X26
Intro paths
YC
Marc 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 Andrew Miklas, General Partner at Y Combinator — the partner who ran Complir's batch and knows the company first-hand. YC profile ↗
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In turn, Marc can intro founders to Complir's investors below.
Complir's investors · 2
Co-founders at Complir
GB
Gustav BangFounder
TK
Tine KühnelFounder
Experience
- ComplirCo-Foundercurrent2025 — presentCopenhagen, Capital Region of Denmark, Denmark
- PentiaKonsulent2023 — 2025
- PentiaStudentermedhjælper2023København, Capital Region, Denmark
- be-aheadWeb Developer2021Copenhagen, Capital Region, Denmark
Skills & more
Engineering3Concurrent Programming1Distributed Systems1Data Structures1Artificial Intelligence (AI)Software DevelopmentPython (Programming Language)3JavaC (Programming Language)C++C#1Operating Systems1
+1 more
GitLanguages Danish · English
From Marc's professional profile.
Frequently asked questions
- Who is Marc Kaa Brejner?
- Marc Kaa Brejner is CTO at Complir.
- Where does Marc Kaa Brejner work?
- Marc Kaa Brejner is Founder of Complir.
- What companies did Marc Kaa Brejner found?
- Marc Kaa Brejner founded Complir.
- Where did Marc Kaa Brejner go to school?
- Marc Kaa Brejner studied at DTU - Technical University of Denmark (Master's degree, Computer Science and Engineering); DTU - Technical University of Denmark (Bachelor's degree, Software Engineering).
Founder mafias
Y Combinator mafia10,230
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianPartnerFounded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Paradigm +1
+ 10,223 more
Same school
Also attended DTU - Technical University of Denmark139
Lars PedersenPartner, Chief Financial Officer at Redpoint VenturesClaus AnderssonGeneral Partner at Sunstone CapitalKartik KashyapStudent Assistant at Sunstone CapitalChris PorsgaardPartner at SEED Capital DenmarkStephan ChristgauFounding Partner at EIR VenturesOtto SilvennoinenAsset Manager, Real Estate at Innovestor Ventures
+ 133 more
