Better Decision Through Collective Intelligence

A software and a service for conducting participatory online surveys

Mesydel offers a scientifically proven methodology, a tool and a service to help conducting participatory consultations.

Establish a diagnosis

Many actors or stakeholders involved? A complex situation to analyze? Mesydel is a powerful tool that brings together diverse points of view to co-construct a clear and objective diagnosis of a situation.

Build a shared vision

The Delphi method used by Mesydel makes it possible to gradually rally diverse opinions towards a shared vision or a consensus. It is recognized for achieving consensus in controversial or vague situations.

Anticipate a trend

A new market, a competitor that emerges, a prospective evaluation to be carried out ... Mesydel is also a decision-making tool to better anticipate the evolution of a sector in a world in constant change.


Mesydel is accessible through a web browser.


Mesydel offers methodological and analytical support services.

Why us ?


User-friendly and ergonomic interface


Multiple languages and fine selection of recipients

Participation rate

A much higher participation rate than traditional methods


More than 10 years of experience: support and analysis services in partnership with the University of Liège (Belgium)


Mesydel is at the forefront in terms of data security and interactions. Our data centers are located in Belgium.

Delphi Method

A tested and approved method: Mesydel uses Delphi, an iterative method that has proven itself in the creation of consensus and the diagnosis of complex situations.


The consultations are carried out in several rounds allowing a real interaction with users.

Freedom of speech

Anonymity reinforces freedom of speech in comparison with non-anonymous methods. Mesydel uses both the personal intuition and the expertise of interviewed actors.


Do not hesitate to contact us by phone or email to let us know about your project.

Our team

Pierre Delvenne

Martin Erpicum


Robin Crunenberg

Robin Crunenberg

Business Development Manager

Maxime Petit Jean

Maxime Petit Jean

Scientific Advisor

Mylène Rivière

Mylène Rivière

Scientific Advisor

Catherine Fallon

Catherine Fallon

Scientific Promotor

Pierre Delvenne

Pierre Delvenne

Scientific Promotor

Agnès Giner Lloret

Agnès Giner Lloret

Legal Advisor

Our references

  • Logo of Région Wallonne
  • Logo of SPIRAL
  • Logo of SPW
  • Logo of FNRS
  • Logo of IWEPS
  • Logo of WeLL Living Lab
  • Logo of Politique scientifique fédérale belge (Belspo)
  • Logo of Fondation Mérieux
  • Logo of UMONS
  • Logo of WSL
  • Logo of PDC Partnership for Dengue Control
  • Logo of Collège Régional de Prospective
  • Logo of KCE, centre fédéral belge d’expertise des soins de santé
  • Logo of Centre fédéral de crise – IBZ (SPF intérieur)