More about Marek Roostar
Marek has 20 years of B2B sales & marketing experience. Last 10 years he’s been working with innovative technology start-ups like Timbeco (smart construction), Cleveron (robotics) and Elcogen (cleantech & renewables). He is true believer in process thinking and enthusiast of personality psychology.
Marek’s main role has been to drive growth of start-ups on export markets. In some cases, it involved leading the changes inside the company, in some cases it involved international marketing and sales strategy development and in some cases it involved communications and branding formation.
Marek's current role is to drive growth of Elcogen - an Estonian cleantech start-up, one of the leading European hydrogen technologies (SOFC/SOEC) developer and manufacturer. Winner of Innovation at European Business Awards 2019, Innovator of Estonia 2020. Marek' customer portfolio includes global brands from energy, automotive and utility industries, mostly from Japan, S-Korea, China and USA markets.
Marek’s main role has been to drive growth of start-ups on export markets. In some cases, it involved leading the changes inside the company, in some cases it involved international marketing and sales strategy development and in some cases it involved communications and branding formation.
Marek's current role is to drive growth of Elcogen - an Estonian cleantech start-up, one of the leading European hydrogen technologies (SOFC/SOEC) developer and manufacturer. Winner of Innovation at European Business Awards 2019, Innovator of Estonia 2020. Marek' customer portfolio includes global brands from energy, automotive and utility industries, mostly from Japan, S-Korea, China and USA markets.
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The eChai Effect - In Their Words
"eChai isn’t just a startup community … it’s a mindset . eChai has been one of the most impactful communities in my entrepreneurial journey. It’s been a turning point . In a world where building something can often feel isolating, eChai gave me a sense of belonging. I’ve found mentors, collaborators, and friends here — people who genuinely want to see you succeed. It’s a space where ideas are challenged, actions are celebrated, and founders grow not just in scale, but in clarity and confidence. From late-night ideas to early-morning pitches, this community has quietly but powerfully shaped the way I build, think, and dream. I’ll always be grateful for the way eChai creates spaces where founders don’t just grow businesses — they grow together."
Koumal Kalantry
Founder, Bignano Ventures
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Heet Sheth
Growth and Tech, Sheth Info
"If there’s one phrase that sums up my journey, it’s truly ‘The eChai Effect.’ Six years ago, I simply walked into my first eChai event, not knowing what to expect. The honest conversations, energy, and inspiration from founders and entrepreneurs struck a chord within me. That eChai spark became the catalyst for everything to follow. I proudly say: my entrepreneurship journey started—and keeps evolving—because of eChai. Redicine Medsol’s story is integrally linked to this community. I’ve gained so much, not just as a founder but as a forever volunteer and grateful member of the eChai family. With all my heart, thank you Jatin Bhai and everyone at eChai for shaping, guiding, and supporting my dreams. The eChai Effect will always be a part of my story."
Kush Prajapati
Founder, Redicine Medsol
eChai Partner Brands
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