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Fifteen thousand entrepreneurs, one day, a single application

  • bpifrance
  • Finance
  • Product ID
  • AI
  • 2024 → 2025
Le logo Bpifrance sur un ordinateur portable, devant une mosaïque d’écrans du design system

Europe’s largest gathering of entrepreneurs fits into a single day: everyone opens the same application at the same hour.

01.The challenge

A programme that keeps moving until the last minute

La scène de BIG, un globe lumineux entre deux panneaux bpifrance, devant une salle comble

Six hundred talks, forty rooms, and a programme still changing the night before. Paper could not keep up, and the event website asked you to zoom in to read a start time.

We designed the application around a single question — what is this person doing in the next ten minutes? The personal programme comes before the full one, the map opens on the next room, and a last-minute change reaches every phone within seconds.

A Prysm round table, mic in hand, in front of the magazine poster
Two speakers presenting Prysm to an attentive room

02.The product approach

Fitting a whole day into the next ten minutes.

Three team members talking, laptops on their knees

03.The method

Our approach: design for one hand, standing up, in the noise.

  • 001.

    A traffic peak lasting one day

    The whole audience arrives at once, as the doors open, on a saturated network.

  • 002.

    A moving programme

    A talk that moves has to reach the people signed up before they walk into the wrong room.

  • 003.

    Used standing up

    The app is checked between two sessions, one-handed, without headphones and without patience.

La scène de BIG, un globe lumineux entre deux panneaux bpifrance, devant une salle comble
Group photo of the team gathered on benches
A Prysm round table, mic in hand, in front of the magazine poster

A full-scale dress rehearsal a month before, then the day itself, watched room by room. The application carried all fifteen thousand visitors without an interruption, and the paper programme was not reprinted the following year.

04.Our impact

  • 15,000

    entrepreneurs equipped on the same day.

  • 600

    talks kept up to date until the last minute.

  • 0

    minutes of downtime during the event.

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