The founders of Helsieni do not understand the word ‘waste‘. Their grey brain cells have a disorder that always turns this word into ‘mushroom‘. This could be considered as a handicap, but they decided to see it as an opportunity. Thus Helsieni was born, with a core mission of cultivating mushrooms on what others call ‘waste’ (used coffee grounds, agro-industrial byproducts, or other un-utilized nutrient streams).

Helsieni does not build big factories. We believe that people should learn how to produce mushrooms at home, from their own coffee grounds. For that purpose, Helsieni provides people and companies with highly efficient low-tech solutions.


Stéphane Poirié


When he is not busy tasting Chris’ yummy lunches, Stéphane is a loud mushroom engineer, an organic electrical grower, an enthusiastic chicken saxophonist as well as a happy jazz farmer.

Favorite mushroom dish: Mushroom burger


+358 49837274

Chris Holtslag

Chief Coffee Waste Cyclist

Chris enjoys creating stuff, from companies to jazz bands. He is the Flying Dutch Designer, cycling around Helsinki. To fuel up he eats spicy food, Indian or Latin-American: Ay caramba!

Favorite mushroom dish: Mushroom ceviche


+358 404712738

Benoit Mantel

Mushroom Business

Benoit is bringing Helsieni international.



Helsieni is supported by

Lorin von Longo-Liebenstein

Mushroom Agent

If you want to know something about mushrooms just start talking to him.

Favorite mushroom dish: Parasol Schnitzel

Miina Rautiainen

Master of Sihis

Miina is a journalist and engineer, crafter, forest lover,  juicemaker, and full of mushroomy ideas.

Favorite mushroom dish: Fried oyster mushrooms with a pinch of salt


Joonas Hoikkala

Production Engineer

Joonas would prefer being under the sea with diving tanks on his back.

Favorite mushroom dish: Fried oyster mushroom with fresh herbs


Lilli Linkola

Mycelium network

Lilli sees mycelium as part of the solutions of the future.

Favorite mushroom dish: Szechuan style oysters

Jussi Aav

Doctor Mushroom

Jussi is into nature, circular economy, urban farming, veganism and much more. As a

Orest Lazepka

Mushroom Metalhead

Orest does not talk about urban agriculture, he does it! Check out his farm: www.omapelto.fi

Javier Mansilla

FungIT Support

Javi’s mind is into computers, his heart is in the forest.


Sini Ilmonen

Circular Economy Expert

Sini finds her passion in circular economy and  enjoys being in the forest with her dog Vilja.

Favorite mushroom dish: Spicy oyster mushrooms with noodles

Helsieni in the media

Aalto University Magazine 22 – April 2018: p34-39

Sitra Case Study / Sieniviljelya-kotoisasti-kahvinporoissa – Dec 2017