Sebastian Thunman is Co-Founder and COO of Strawberry, a Stockholm-based AI browser where agents work across the tabs, logins and tools people already use.

Sebastian taught himself to code at 16, started his first tech startup in high school and dropped out to pursue his own projects. He co-founded Catcher Games AB, which ran for nearly seven years and attracted more than 20,000 paying users across Europe and the US, and later co-founded Team Together.

He earned a spot at the SSE Business Lab, a selective program for early-stage founders, and is a former competitive ballroom dancer. Outside of building, he enjoys strategy games, sports and the outdoors.

Strawberry raised a $6M seed round in October 2025, co-led by General Catalyst and EQT Ventures with participation from founders of Lovable, Supabase and Hugging Face. Sebastian leads operations alongside CEO Charles Maddock and CTO Arian Hanifi, and often demos the product publicly.

Strawberry opened its browser to the public after closing beta, having drawn 10,000 pre-registered users at its beta stage. The team aims to take on US AI heavyweights by making AI agents usable for non-technical teams in sales, recruiting, support and marketing.