NS27 Iterate
NS27
NS27Iterate Become a partner

We rented two train carriages to the Arctic for forty builders.

Whatever gets built, gets built on the way. One company sets the problem.

3 to 6 December 2026 · Helsinki to Lapland

Set the challenge builders, join the waitlist
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Ecosystem partners
01Crucible

NS27 is a crucible.

A crucible is the vessel a furnace melts metal in, built to outlast a heat nothing inside it survives. What enters it leaves altered, or does not leave.

Heat has no interest in what the metal intended to be. It takes the dross first and then whatever was never as solid as it looked. It returns less than it was given.

A room can do the same to a person. Nobody tells you which parts of your work were real. The room shows you.

So we built one out of two carriages, forty builders and eight hours of track. There is no door out of a moving train and no quiet corner on it.

Most people never find out how good they could have been, because nothing ever asked. The train asks in December.

Arturs Zustars
Gleb Ershov

Arturs Zustars and Gleb Ershov

02The Builders

There are forty seats and we choose everyone who gets one.

I We want the people who win the rooms everyone else attends.
II For the ones whose work is already live in front of real users.
III For the ones the great universities produced and the ones they missed.

The room closes at forty. That is the point of it.

03In Good Company

The room is already kept in good hands

Co-hosts
I Tool Sponsors
II Investor Cohort
First seat held · two remain
III Venue Partner
IV Ecosystem Partners
04The Journey

What the four days look like

I
Thursday, Helsinki

The Arrival

Everyone lands and we all meet at maria 01, an old hospital that is now full of startups. The evening is introductions and getting to know the rest of the room. That is where we reveal the challenge.

II
Friday, on the train

The Build

Two carriages, forty builders and forty of us. The clock starts when the train leaves Helsinki and stops in Rovaniemi. Every team pitches the main challenge at Kaamos Lodge.

III
Saturday, Kaamos Lodge

The Lodge

Two smaller challenges at once, five hours each, twenty builders on each and the teams shuffled. There is a spa, there is snow and there is a long dinner that night.

IV
Sunday

The Return

The train back to Helsinki. Everyone goes home. The group does not really break up after that, which is the part we care about most.

For eight hours, forty builders will work on nothing but the problem you set them.

05The Offer
One company, open

Main challenge

You choose the problem. All forty spend the eight hours on it. Three of your team ride the train and judge. You see what they build thirty days before anyone else.

Two companies, both open

Side challenge

You choose a problem for twenty of them at the lodge and they get five hours on it. Two of your team judge and you hand out the win at dinner.

One gone, two left

Investor seat

Two of your team ride the whole thing and meet all forty before they have a deck or an open round. You are on the judging panel and at every dinner. We introduce you to anyone you ask about.

Six sponsor spots in total. Once they are taken, that is it.

Let us make the first one worth remembering.

Europe has a habit of losing its best builders to comfortable rooms and this is our attempt at doing something about it. The train runs once this winter. The people on it will still be talking to each other long after it stops.

Become a partner builders, join the waitlist
3 to 6 December 2026 Helsinki to the Arctic