Marek Roostar - Director of Sales & Marketing,
Elcogen AS

Marek Roostar

Director of Sales & Marketing, Elcogen AS

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.

Signing up on our website is completely free! If you encounter any issues with profile or notice something unusual, please don't hesitate to report it to us. We're here to help ensure a smooth and secure experience.
Featured speaker at previous eChai events:
Startup Growth Networking Meetup in Tallinn x Draper Startup House
Founders and startup folks who joined past eChai startup events

The eChai Effect - In Their Words

"From late-night brainstorming over chai to early morning founder calls, eChai has been more than just a network for me; it’s been home base for ideas, impact, and inspiration. What started as a simple meetup years ago turned into a powerful movement, connecting founders, creators, and dreamers. I’ve had the privilege of seeing startups find product-market fit, marketers (like me) find unexpected collaborations, and most importantly, people finding their tribe. संगच्छध्वं संवदध्वं – Let us move together, speak together. It’s not just a verse from the Rigveda — it’s how Jatin and the entire eChai community truly operate. We don’t just network, we grow together. Forever grateful to be a part of the eChai Effect.
Jaydip Parikh - Chief Everything Officer at Tej SolPro
Jaydip Parikh
Chief Everything Officer at Tej SolPro
"At DevX.Work, we’ve greatly benefited from our association with eChai. Their events and networking forums have connected us with high-potential startups, ecosystem leaders, and innovation-driven professionals — many of whom have become valuable partners, collaborators, and even clients. What stands out most is the openness and accessibility of the community — whether you're an early-stage founder or an experienced entrepreneur, eChai provides a welcoming space to learn, collaborate, and grow. It's more than just a network — it's a catalyst for real, collaborative growth. We’re proud to be part of the eChai community. Highly recommended for any organization aiming to grow within the startup space."
Umesh Uttamchandani - Co-Founder, DevX
Umesh Uttamchandani
Co-Founder, DevX
"I attended my first eChai event 3 yrs back, and no one knew me in the market. Over the next three years, eChai didn’t only help me with knowledge or networking, but it gave me an identity from being unknown to now being recognized by a group of inspirational entrepreneurs connected with eChai, who have been gracious enough to acknowledge me and Digipple."
Viraj Rajani - Co-Founder, Digipple
Viraj Rajani
Co-Founder, Digipple

eChai Partner Brands

eChai Ventures partners with select brands as their growth partner - working together to explore new ideas, open doors, and build momentum across the startup ecosystem.