The origins of Le Triplex

A place imagined and shaped by a founder, for founders.

It all started with Mathieu TARNUS, founder and CEO of software company Positive (400 employees, 75M euros in revenue) and one conviction: the greatest entrepreneurial journeys are born from connections, sharing and healthy competition.

Entrepreneurial DNA.

A serial entrepreneur with a passion for product innovation and digital marketing, Mathieu started out at the end of his studies, in the early 2000s, launching Sarbacane Software as a family venture. The company grew over the years, became a group he renamed Positive in 2022 and made a series of strategic acquisitions. His ambition is to build Europe's leading marketing software company for SMBs. An investor in more than 50 startups, he is also the founder of 404 Ventures and plays an active role in bringing tomorrow's Tech leaders to life.

Connecting entrepreneurship with investment.

Le Triplex is the headquarters of 404 Ventures, an early-stage fund that invests across France, from pre-seed to seed, with tickets from 50K to 200K euros and a strong Tech focus. It is also the base camp of ELEVATION, a private accelerator that combines investment, strategic support, mentorship and access to a network of founders and investors.

The team

that brings the place to life.

Head of Le Triplex

Marianne Demeestere

Events & partnerships. Former Managing Director of a club of 350 startups, SMBs and mid-market companies
LinkedIn
General Partner, 404 Ventures & ELEVATION

Julien Trucy

Former trader and mentor to 200+ startups · Legaltech founder
LinkedIn
Admin, finance & People

Marine Renard

Strategic steering, financial structuring and multi-entity project management
LinkedIn
Head of ELEVATION

Vincent Godbert

Former D2C startup founder · Building the acceleration program
LinkedIn

At the crossroads of Paris, London and Brussels, Lille is a metropolis on a human scale where founders and investors meet naturally, giving rise to a vibrant ecosystem and opportunities to collaborate.

Paris 1 hour
Brussels 35 min
London 1 hour 20

A place imagined and shaped by a founder, for founders.

Entrepreneurial DNA.

Connecting entrepreneurship with investment.

Marianne Demeestere

Julien Trucy

Marine Renard

Vincent Godbert

Let's write the next chapter together