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Opinion·Aug 20, 2026·4 min read

Warmwind OS: I forgot it existed. I won't join BETA.

I wasn't planning on writing another post today, but this one wouldn't leave me alone. Last night I got an email invitation from Warmwind OS. I could not for the life of me remember what it did, or how I ended up on their waitlist in the first place.

Warmind OS invitation email

(I cut a part of the screenshot because of the invite link)

Naturally, I clicked the link. It took me to a page that still couldn't tell me what I'd signed up for. Whatever explanation used to exist for me, it wasn't there anymore, at least not where I could find it easily.

Warmind OS invitation page

It was only when I clicked through to their YouTube video that it started coming back to me. Kind of. I remembered a mountain view, and someone walking through what Warmwind OS was supposed to be. That's it. That's all that came back.

Warmind OS YouTube info

Here's the problem. I'm NOT going to join their BETA. Not because the product looks bad, but because I had to dig this hard just to remember what I'd signed up for.

An invitation email that lands on a page carrying that much cognitive load isn't an invitation; it's a chore. And I don't do chores for products I can barely remember.

That "what the fuck is this" moment tells me something about the team behind it too. Either they didn't send enough updates to keep their waitlist warm, or they didn't think it mattered.

I signed up close to a year ago. Leave someone waiting that long without a word, and don't be surprised when they've forgotten why they said yes in the first place.

Self-funded?

Then there's the email itself. It states, plainly, that Warmwind OS is self-funded, and that's the reason they can't offer free trials to people who've been on the BETA waitlist for a year. On its own, that's already a strange ask. Wait a year, then pay to try it.

But I went and checked their blog. Two things stood out. First, the blog hadn't been touched in thirteen months, which lines up with when I signed up.

Warmwind OS blog timeline

Second, there's a post from July 2025 announcing a completed PRE-SEED round of €1.5 million, backed by a regional investment fund and other investors.

Warmind pre seed round

So either I'm misreading something, or the company that just told me it's self-funded isn't actually self-funded. If I'm wrong, they're welcome to correct me.

But the numbers are sitting right there on their own site, and I don't see how both statements are true at once. And on top of that mismatch, they still want €24 a week to try the BETA.

Not a chance.

Rookie mistakes

Any one of these on its own might be a coincidence. All of them together aren't. From where I'm sitting, this looks like a string of rookie mistakes from a team that should know better.

They got so focused on building the product that they forgot about the people waiting for it. A year is a long time to go quiet on a waitlist, and I doubt I'm the only one who opened that invitation and drew a blank.

They have a team. They have funding. And they still failed at the one thing that costs almost nothing: keeping the people who already said yes in the loop.

That's the kind of mistake I'd expect from a solo indie hacker running things alone, not a company that closed a seven-figure pre-seed round.

A lot changes in automation in a year. Whatever Warmwind OS looked like when I signed up almost certainly isn't what it is now, and that's exactly the point. I'm a Eurasian founder myself, and I'd genuinely like to see a European AI product do well here.

But wanting that isn't the same as ignoring the fundamentals of keeping an audience with you.

If they're going to let people wait a year and then ask them to pay to find out if it was worth the wait, I'm out. The least they could do is offer a one-week trial, if only to hear from the people who've been waiting longer than most startups have even been alive.

Final thought

I don't think Warmwind OS is a bad product. I don't know, because I never got far enough to find out. What I know is that somewhere between the waitlist and the BETA invite, they lost me.

Not with the pricing, not with the tech. With silence, and then with a pitch that didn't add up. That's the whole story, and it's a shame, because a year ago I was curious enough to sign up in the first place.

Pieter Borremans

Written by

Pieter Borremans

Writer·Content creator·Founder

Based in Taichung, Taiwan and London, UK, this is Pieter's personal journal and builder's blog: field notes on entrepreneurship, solo business-building, and the unfiltered reality of creating online. Alongside it, he's chasing one absurd goal in public, $168M USD in lifetime earnings, tracked live from zero.