One of our portfolio companies has just packed their bags for San Francisco. Complir, the Copenhagen-based startup building AI infrastructure for global retail compliance, has been accepted into Y Combinator's Spring 2026 batch.
It's a milestone worth talking about, and we asked CEO and co-founder Gustav Bang to walk us through how it happened.
Nudge from an investor
Complir wasn't actively hunting for a spot at YC. The idea came from Neil S. W. Murray, one of their early backers, who raised it as something worth considering. Murray had been through YC himself with Playmaker, so he knew what the program could do for a company at exactly this stage. Gustav and the team picked it up immediately.
"We were at a stage where we had also gotten affirmed that we might have a market big enough to support a YC-ready growth trajectory."
"We already knew about YC, of course, but we hadn't thought actively about going there," Gustav explains. "When Neil raised it, we immediately thought it could be a good idea. We were at a stage where we had also gotten affirmed that we might have a market big enough to support a YC-ready growth trajectory."
Less than a month after submitting the application, the team heard back. Not a rejection, an invitation to interview.
Ten minutes to make the case
The YC interview is famously brief: ten minutes, two partners, no room for rambling. The format rewards founders who can communicate with precision, show alignment as a team, and make a clear case that they're solving a real and unique problem.
To prepare, Complir ran mock interviews with founders who had been through YC before. The sessions were deliberately uncomfortable: interviewers throwing curveballs, cutting people off, pushing for faster, sharper answers. One rule stood out.
"Me, Marc and Tine, we love to finish each other's sentences," Gustav says. "But in YC, it's really important in the interview not to do that. If you step in to complete a founder's point, it can look like there's less founder chemistry, even if the opposite is true."
Understanding the format mattered as much as knowing the content.
What got them in
When Gustav reflects on why they were accepted, he points to the timing as much as anything else.
The company had 45% month-over-month growth. They had major retailer names across different product categories. They had a team of ten, with three founders each bringing distinct expertise in management, tech and product, all with prior founding experience. And they were already selling across European markets with a clear thesis on how to expand further.
"When YC saw us, we were a case that completely fit their thesis around how you should build a vertical B2B SaaS."
"When YC saw us, we were a case that completely fit their thesis around how you should build a vertical B2B SaaS," Gustav says. "Having paying customers before scaling, a founding team with three engineering backgrounds but three different specialties, heavy focus on go-to-market across markets. We fit those criteria quite well."
Complir's platform helps retailers automate the complex, manual work behind product compliance: labelling, testing requirements, risk scoring, documentation, and regulatory monitoring across markets. The platform is already used by leading Scandinavian retailers including Flying Tiger Copenhagen.
The next phase is about making that platform easier to take into use and easier to use at scale.
"We really love our product today. We're very proud of it," Gustav says. "But for us, it's all about maturing that platform now. Going from product-market fit to go-to-market fit. Making it easier to onboard, easier to understand, easier to use. Our end users are not necessarily the most technically savvy, so ease of use is everything. Three months of focused development on that."
Gustav and his co-founders Marc Kaa Brejner and Tine Kühnel are in San Francisco as of today. We're excited to see what comes out of the batch!
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