Kristoffer and his folk high school friends use Oase Plenum.

Between the group’s get-togethers, the friendship lives on Oase. They discuss darts, politics, football, cycling and quizzes, each in its own oase, and photos and links go back and forth.

Before that, they were on the American platform Slack. It worked — apart from one thing.

“The only thing that really annoyed us in practice about Slack was that the history only went three months back unless you paid,” says Kristoffer.

For a group that has known each other for 30 years, three months isn’t much. On Slack’s free plan, they could no longer see conversations older than that.

Slack had solved a problem they’d had before.

“On Facebook and email, the annoying thing was that all sorts of topics got mixed up into one big muddle,” he says.

But at the same time, Slack cost them their memory. And on top of that, they all really wanted to find a Danish alternative.

“What made us move over to Oase was the shift away from Big Tech and the growing focus on privacy,” says Kristoffer.

He heard about Oase through a colleague. He wrote to Anders from Oase and explained what he was missing: being able to create separate topic threads for the same group of people. Anders told him they were building exactly that. When Oase Plenum was ready, Kristoffer asked the others whether they were up for trying it out.

They didn’t look at any other options. They chose Oase “because it’s Danish, and first and foremost because privacy is protected.”

Kristoffer had no doubts about switching, but he was a little worried about one thing:

“I was maybe a bit worried whether Oase would run as smoothly as Slack, but it does.”

The rest of the group didn’t need convincing.

“I just asked and people were in,” he says.

They moved over in June 2026, and within about a week all seven were on board. The start-up only brought a bit of hassle with small things: making sure a new oase ended up inside the group’s shared space, and figuring out how to type emojis on a PC.

Today the friends have around 25 oases, and everyone writes on equal terms. Kristoffer still misses a couple of things, though. He’d like to be able to tag a specific person who needs to see something. Here, it’s also great to be able to write directly to the developers behind Oase with feedback, and to feel heard.

So what happens when the free trial runs out? Are the friends ready to pay for Oase Plenum?

“Yes. What makes us willing to pay for Oase, when the time comes, is the privacy, but also that we keep our entire history,” says Kristoffer. “So better to pay for a Danish platform like Oase than American Slack, and get privacy thrown in as well.”