Le Sentier
My brother and I have always been deeply passionate about tech, AI, philosophy, and personal development. We love to read, to build products, and we're endlessly curious about how humans work. How to find purpose, how to dream, and how to actually achieve those dreams. We've been inspired by people like Mark Manson, Tony Robbins, and The School of Life, among others.
My brother was working at a tech startup in Paris, but at night he was hacking on side projects, constantly thinking about what he truly wanted to build. He was never interested in quick "get rich" schemes. He wanted to build something generational, something that would bring real value to people. He's very much anti-big tech in that sense. He hates TikTok, dropshipping, and the whole "how to make money" side of YouTube. He's the kind of person who waits for the bus without scrolling, just looking at the sky and thinking.
On my side, I was building my own startup (Studcasa) while studying. He kept sharing his notes, his ideas, and early demos with me. And more and more, he became convinced of something bold: that AI could be your biggest ally to actually do stuff in the real world. Not an AI companion designed to keep you engaged and be nice to you. The opposite. A new kind of coach, one with infinite memory, always available, with a single goal: help you grow and actually get things done. An AI that's not here to comfort you, but to make you see that you're full of bullshit.
At first, with my parents, we thought he was crazy. It felt way too ambitious. No way he could pull something like that off. And to be fair, he's great at vision, but not always the fastest at shipping.
But eventually, he showed me a first version.
It wasn't great. It was basically a 40-minute conversation with an AI chatbot that asked deep questions, pushed you to be more honest, and then generated a long report about you. But the value of that report was astonishing. Léo understood things about me that I had never clearly seen before. Things I probably knew deep down, but had never articulated.
That's when it clicked.
At the same time, I was running my own startup. It was going okay, but I wasn't seeing myself doing it for the next years. At some point, you need to be honest about whether you want to continue. So I started thinking more and more about building with my brother. He's the perfect cofounder. I'm genuinely amazed by how smart he is, and we're highly complementary. I'm more about action, speed, and growth. He's more about depth, reflection, and product quality. I'm okay shipping something imperfect. He's not. He keeps the bar incredibly high. I make sure we move fast. It's a powerful balance.
Then he made a radical decision: he dropped out of both school and his startup job, with just enough money to live for about a year. He left during his final year (Master 2). Everyone was shocked.
In December 2025, while I was studying abroad in Rio, I made my decision too: I joined him. We decided to go all in and try to build something truly generational.
From December to January, we built a new version called La Forge. It was much more action-focused, a product designed to push people to actually do things in the real world. That was the core idea. We saw the potential, but we weren't fully satisfied. Still, we shipped it. The feedback was rich and gave us a lot to reflect on. We were onto something, but not quite there yet. So we stepped back, rethought everything, and rebuilt from the ground up.
That's how Le Sentier came back on track.
Today, Le Sentier is a mobile app for ambitious people who feel the gap between what they could be and what they actually do. At the center is Léo, an AI Ranger that helps you get clear on what you want and act on it consistently. Not with motivation, but with structure.
The core experience is a daily ritual. A moment to reflect, face reality, plan the next step, and reconnect with what truly matters. Over time, Léo gets to know you deeply, challenges you honestly, and helps you build real momentum.
We're now putting it in the hands of our first users. But honestly, the best way to understand Le Sentier is to go try it.
Website: lesentier.net