4x founder

Mattan Griffel

Professor, Entrepreneur, Angel Investor

Co-founder

Ophelia· Winter 2020 🇺🇸 Brooklyn, New York, United States

in LinkedIn 𝕏 @mattangriffel

2025Assistant Professor of Professional Practice· Columbia Business School

Founder · since 2011

Company

Columbia Business School

Role

Assistant Professor of Professional Practice

current

Stage

—

no public source

Raised

—

no public source

Based

New York, United States

current

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

Ophelia

Medication & support to beat opioid addiction from home

Winter 2020

Experience

Career

Columbia Business School
Assistant Professor of Professional Practice · New York, United States · 2025 – Present
2025
Columbia Business School
Adjunct Assistant Professor of Business · New York City Metropolitan Area · 2016 – 2025
2016
Eugene M. Lang Entrepreneurship Center at Columbia Business School
Lang Entrepreneurship Coach · 2023 – Present
2023
Ophelia
Board Observer · New York, United States · 2023 – Present
2023
Ophelia
Co-founder
Co-Founder, President, & COO · New York, United States · 2019 – 2023
2019
YPO
Member · 2021 – Present
2021
Invisible
Partner, SVP · 2024 – 2025
2024
Invisible
Advisor · 2023 – 2024
2023
Eugene M. Lang Entrepreneurship Center at Columbia Business School
Lang Center Innovation Fellow · New York, United States · 2019 – 2021
2019
One Month
Chairman · Greater New York City Area · 2017 – 2021
2017
One Month
Co-founder
Co-Founder & CEO · Greater New York City Area · 2013 – 2017
2013
Sandbox
NYC Ambassador · Greater New York City Area · 2010 – 2020
2010
GrowHack
Founder
Partner · Greater New York City Area · 2012 – 2016
2012
The Front Labs
Founder
CEO & Founder · Greater New York City Area · 2011 – 2013
2011
appssavvy
Head of Marketing · Greater New York City Area · 2010 – 2011
2010

Bio

Mattan is an award-winning faculty member at Columbia Business School and a two-time Y Combinator-backed entrepreneur. He co-founded Ophelia, a company that helps people quit opioids without having to go to rehab. Mattan is also an Innovation Fellow at the Lang Center for Entrepreneurship at Columbia Business School and was selected as one of Forbes' 30 Under 30 in Education. I studied Philosophy and Finance at New York University and wrote my thesis on the metaphysics of consciousness.