About
Oscar Karlstromer is the founder of Zaplar. He previously attended the Stockholm School of Economics (making the Honors List before dropping out), founded a Nordic non-profit for middle school academic competitions that reached 40,000 students with a 13-person team, and worked in APAC B2B sales handling accounts over $1M AUD across Sydney and Singapore.
Founder at ZaplarYC S26
Intro paths
Oscar went through Y Combinator (Summer 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Jared Friedman, YC Group Partner — the partner who ran Zaplar's batch and knows the company first-hand. YC profile ↗
In turn, Oscar can intro founders to Zaplar's investors below.
Zaplar's investors · 1
Co-founders at Zaplar
Experience
- ZaplarCo-foundercurrent2026 — present
- Wall Street OasisEquity Research2025 — 2026
- JabraB2B Sales and Marketing focus2024Sydney, Australia & Singapore
- Rising Scholars GroupCo-Founder & CEO2023 — 2024
- GN Hearing ANZMarketing and Sales Admin2024Sydney, NSW
Skills & more
Languages English · Swedish
From Oscar's professional profile.
Frequently asked questions
- Who is Oscar Karlstromer?
- Oscar Karlstromer is the founder of Zaplar. He previously attended the Stockholm School of Economics (making the Honors List before dropping out), founded a Nordic non-profit for middle school academic competitions that reached 40,000 students with a 13-person team, and worked in APAC B2B sales handling accounts over $1M AUD across Sydney and Singapore.
- Where does Oscar Karlstromer work?
- Oscar Karlstromer is Founder of Zaplar.
- What companies did Oscar Karlstromer found?
- Oscar Karlstromer founded Zaplar.
- Where did Oscar Karlstromer go to school?
- Oscar Karlstromer studied at Y Combinator (S26); Stockholm School of Economics (BSc in Business and Economics (dropout)); The Wharton School (Wharton summer studies, Statistics).
Founder mafias
Y Combinator mafia8,773
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Y Combinator mafia4,716
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The Wharton School mafia209
Also came through, then founded or led a company.
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Stockholm School of Economics mafia30
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Same school
Also attended Y Combinator2,000
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Also attended Stockholm School of Economics215
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