GROWL: Transforming Boxing into a Personalized Training Experience

To inspire the confidence to dare

Our values

Pioneer Fitness for Good

Empower to Push Limits

Passionately GROWL Together

Why GROWL

GROWL represents a powerful, resonant sound. It’s the rumble that drives you to push beyond your limits. The roar that echoes as you break through barriers. The liberation you feel with every punch. GROWL is the sound you make when you choose to fight back.

But GROWL is more than a sound—it’s a call to action. For those who dare to get back up and face whatever stands in their way.

Founders story

A Life-Changing Year in the US

Léo: GROWL’s journey began when I moved to the U.S. at 16, as a foreign exchange student. Fresh off being kicked out of high school back home, I was a young and troubled kid, with little confidence in myself. I barely spoke English and felt lost. Joining the sports team became my way in. That’s where I discovered combat sports—first wrestling, then MMA, and finally, boxing.

I found myself through combat sports and boxing. Suddenly, I realized I wasn’t made out of glass - that I could take a punch but also hit back. I discovered my potential and, more importantly, learned the tools to execute on that potential—a powerful gift for any young person. There’s a saying, ‘Once you’ve boxed, everything else in life is easy.’ That’s the power we’re bringing into homes with GROWL.

From a traditional punching bag to an empowering coach

Years later, in a demanding finance career, I’d squeeze in workouts whenever I could, typically on Sunday nights, punching my heart out on a boxing bag to let go of the week’s stress. But the more I trained, the more frustrated I became. The workout felt passive and dumb—just punching a bag. There was no challenge, no motivation, no coach.

Despite years of practice, I wasn’t improving. That’s when it hit me—the boxing bag needed to become a coach, offering real guidance, engagement and motivation. Not just for me, but for anyone who could benefit from the life-changing power of boxing. So, I left my corporate job and set out to bring this vision to life.

Turning vision into reality

The prototype was rough, but it was wonderfully effective at doing exactly what it needed to do. It wasn’t long before I quit my job and joined Léo on this journey.

Today, we are joined by our amazing founding team (15-strong and counting); on a mission to make the transformative power of boxing available to everyone at home.

Nicolas: When Léo first reached out to me, I thought, "Who is this guy with this wild idea?" What he didn’t know was that I’d started boxing a few years back. I have always been hyperactive and into extreme things. But with boxing I found a unique and effective way to get a grip on my energy and stay focused. I’d also been building connected hardware for nearly a decade, so when I demoed the proof-of-concept, I saw the potential immediately.