Better Decisions Through Collective Intelligence

Watch a 2-minute video

Answers analysed over the last 30 days


Average participation rate


Customer Satisfaction

10 years

Years of experience

Software and services to conduct online participatory consultations

Mesydel offers an online tool and a scientific expertise to best answer your participation and collaboration needs.

Establish a diagnosis

Do you have a complex situation to analyze, one that involve many actors or stakeholders? Mesydel is a powerful tool that brings together diverse points of view to co-construct a rigorous and inclusive diagnosis of the situation at hand.

Build a shared vision

Do you want to develop your firm strategy or create a shared vision from a plurality of opinions? With Mesydel you can construct progressively a consensus. Our method is recognized for being adapted to controversial situations.

Anticipate a trend

Do you need to identify a promising new market, understand competitor’s choices or carry out a prospective exercise? Mesydel is also a decision-making tool used to better anticipate the evolution of your sector in a world in constant change.


Mesydel is accessible through a web browser.


Mesydel offers methodological and analytical support services.

Our prices


Starting at 650 € per project

(VAT excluded, billed per project)

You have expertise in-house to formulate, monitor and analyze a survey. Mesydel is a powerful tool that enable you to carry out your project.

Premium support

Starting at 1 500 € per project

(VAT excluded, billed per project)

You want to benefit from the services of our analysts to ensure a global support of your consultation. They are at your disposal to assist you formulate questions, follow up your consultation or analyze the results.

Complete project

Starting at 5 000 € per project

(VAT excluded, billed per project)

We take care of all the steps necessary to solve your problematic. Let's discuss!

Software features

Online platform Data storage Multiple rounds of questionnaire
Multilingual Several degrees of anonymity Respondents management tool
Intuitive encoding of your questionnaire Personalised Email management module Basic metrics to monitor your survey
Textual analysis tools Quantitative analysis visuals Data export

Why us ?


The Mesydel interface is user-friendly and ergonomic for quick handling.


Our software is available in several languages simultaneously, allowing participants to answer in the language of their choice.

Participation rate

Mesydel allows a much higher participation rate than the traditional consultation methods, thanks to its simplicity of access and its flexibility.


Our team has developed its software and services thanks to 10 years experience at the University of Liège (Belgium).


Mesydel is at the forefront in terms of data security and interactions.

Delphi Method

Delphi Method is an iterative method that has proven itself in the creation of consensus and the diagnosis of complex situations.

Rounds of online questionnaires

The consultations are carried out in several rounds allowing a real interaction with and among participants.

Freedom of speech

Anonymity reinforces freedom of speech by limiting the effects of power and domination from physical interactions.



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

Our team

Martin Erpicum

Martin Erpicum

Founder & CEO

Maxime Petit Jean

Maxime Petit Jean

Co-Founder & Scientific Advisor

Catherine Fallon

Catherine Fallon

Scientific Promotor

Pierre Delvenne

Pierre Delvenne

Scientific Promotor

Our references

  • Logo of WSL
  • Logo of Politique scientifique fédérale belge (Belspo)
  • Logo of Centre fédéral de crise – IBZ (SPF intérieur)
  • Logo of Opengov Intelligence
  • Logo of WeLL Living Lab
  • Logo of FWB
  • Logo of SPIRAL
  • Logo of UMONS
  • Logo of SPW
  • Logo of CERTH
  • Logo of Université de Limoges
  • Logo of SCK-CEN
  • Logo of Fondation Mérieux
  • Logo of Actiris