More about Vishal Rewari

Vishal is a digital product growth expert and has worked with likes of Housing, Deloitte, McKinsey and on 25+ strategic projects and created an impact for $300M+. 

He currently runs firm Optiblack, a Product Growth firm, they are experts in designing, building and optimising digital products. His firm creates websites, mobile apps, SaaS and commerce solutions for ambitious organisations investing in growth and digital transformation. They do that by finding the sweetspot between business need and customer demand, fusing insight, creativity and technology to build products that create value. 

They are trusted to deliver by some of the world’s best-known brands.

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Featured speaker at previous eChai events:
eChai Startup Pickleball Night in Ahmedabad
Ahmedabad SaaS Meetup
Ahmedabad SaaS Meetup
Product Growth Meetup in Ahmedabad
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
"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
Kush Prajapati
Founder, Redicine Medsol
"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
Koumal Kalantry
Founder, Bignano Ventures

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.