The Untold Story of Cambium Carbon’s First 9 Months: From 10 Rejections to Product-Market Fit

Every founder faces rejection. But what separates success stories from failures is how founders respond when everything seems stacked against them. In a recent episode of Category Visionaries, Ben Christensen shared the raw story of Cambium Carbon’s early days – a journey that shows how initial setbacks can lead to stronger foundations.

The Problem Worth Solving

Working in federal carbon policy in 2018-2019, Ben noticed a curious gap in the climate tech landscape: “There’s a lot of effort into enabling solutions and a gap in actual solutions… there’s a lot of new platforms that are trying to create the market conditions… But there was a real gap in actual solutions that were going to actively be dealing with atoms and not just bits.”

This observation led him to discover an overlooked opportunity in urban wood waste: “It’s 46 million tons a year in the US. There’s more wood that comes down in our cities every year that’s salvageable than our national forests… We pay over a billion dollars a year as a country to get rid of.”

The First Major Setback

Despite having funding and what seemed like a compelling opportunity, Ben’s initial attempt to build a team hit a wall. “I had gotten funding so that I could actually fund independent study work for other students to join me,” he recalls. “I felt really confident. I had a great sponsorship, had an interesting idea, could actually pay people to work on an independent study. It was like the lowest risk opportunity ever to join and start something.”

But when he pitched to his closest friends and potential co-founders, the response was devastating: “I brought in about ten of my closest friends and folks who I thought would be in on the idea, pitched it to them, and they all ended up saying no and walking out of that.”

The Psychological Battle

The rejection hit particularly hard because of Ben’s existing struggles with impostor syndrome. “I had gone to grad school, and I went straight in from undergrad. I was the youngest one in my program, and felt fairly consistently like I couldn’t get my foot in the door,” he shares. “That was part of the reason I was trying to figure out something for myself.”

The Turning Point

The breakthrough came from an unexpected source. After the group rejection, Ben made one more attempt: “I then called my best friend from growing up who was just getting back from a fellowship and said, hey, I got this thing. What do you think about coming to work on it? And he was like, yes, sure. Didn’t hesitate.”

This moment taught Ben a crucial lesson about startup psychology: sometimes a single believer is worth more than widespread approval.

Building from Commitment

The early rejections led Ben to make a deeper commitment to his vision: “I want to actually commit to something and commit to something until you have to truly pull it out of my hands.” This mindset shift proved crucial for navigating the challenging early days.

Rather than chasing quick wins, the team focused on solving fundamental problems in the industry. They developed technology to track materials from source to final product, helping companies see “with total transparency, each step of the process, down to every single board.”

Lessons for Founders

For B2B founders navigating their early days, Ben’s journey offers several key insights:

1. Look for gaps between enabling solutions and actual solutions
2. Don’t let early rejections define your vision
3. Sometimes the right co-founder isn’t the obvious choice
4. Commitment can be more valuable than initial traction

Looking back, those early rejections helped shape Cambium Carbon’s approach to solving problems in the urban wood industry. As Ben puts it, “You don’t solve impossible problems without believing in them. And I think as soon as you stop thinking about, okay, what would need to be true in order for us to solve a problem, you stop solving it.”

For founders facing their own early setbacks, this story shows that sometimes the darkest moments come right before the breakthrough. The key is maintaining unwavering focus on the problem worth solving.