A prominent Polish business leader (ex-CEO of ITI Group and mBank), Wojtek pivoted to fintech entrepreneurship and angel investing. As CEO of blockchain fintech Billon Group, he personally invested in Billon and other tech ventures. He was honored as Business Angel of the Year in 2018 for his consistent support of startups. His angel investments include Billon (DLT payments), Quedex (crypto exchange), and AdEmotion (AI marketing). Associated startups: Billon Group, Quedex, AdEmotion.
Warsaw, Poland
Angel Investor
Seed to Series A
/poland/angel-investor/wojtek-kostrzewa
Launched 2018. Poland's first MarTech-focused accelerator run by Knowledge Hub and GroupM; targets AI in marketing, adtech, and influencer platforms. Support: workshops, media-industry mentoring, pilot client access, and sales support. Scope: National.
Active since 2018. Smart-tech accelerator scaling startups across Central and Eastern Europe with programs like AccelStart, AccelBoost, and Green Impact. Support: specialized accelerators, corporate partner network, mentoring. Scope: Regional (CEE).
Chainalysis was co-founded in 2014 by Danish entrepreneur Michael Gronager to bring transparency to crypto markets. The company builds blockchain analytics software used by exchanges, regulators, and law enforcement to trace illicit activity and manage compliance risk. Chainalysis grew into a global leader in crypto intelligence, raised major rounds, and built offices worldwide while keeping a Danish engineering footprint. It is one of the most valuable companies with Danish founding roots in the blockchain sector.
Founded 2018. Growth-stage investor backing enterprise software and fintech scale-ups from Central Europe.
Organizer of the Crypto Finance Conference in St. Moritz.
Investor-focused blockchain and digital assets conference held in the Swiss Alps.