Fintech Magic: How Kristen Castell’s Founders Community is Improving the Financial System for Good

Her path to that mission was not straightforward.

At BlackRock and JPMorgan, she worked on large-scale investment platforms, helping shape products that reached millions. The work was complex and high stakes, but even then she saw a gap.

“We were building incredible things,” she says. “But I kept asking, who is this really helping?”

That question stayed with her as she moved into the startup world, joining a fintech company and helping build it from the ground up. It was fast-paced and demanding, but it also revealed something fundamental.

“When you are building a company, culture is everything,” she says. “If you are not aligned, it shows up everywhere.”

That experience pushed her to think beyond a single company.

What would it take to change the system itself. That idea became what she and her team built with CAFE.

Despite often being described as an accelerator, CAFE does not operate like a typical one. It does not take equity. It does not charge fees. And it does not focus on teaching founders how to pitch.

Instead, it focuses on what Castell believes actually matters.

“We are not about teaching pitch decks,” she says. “We are about relationships.”

The model is built around connecting founders with the people who can help them scale, banks, investors, partners and regulators.

“We make introductions all day long,” she says. “That is what moves a company forward.”

The founders themselves are at the center of everything.

“The hardest job in the world is being a founder,” she says. “You are living it every minute. You are breathing it. If you do not have that real why, it is very hard.”

That belief shapes how CAFE selects companies. Out of dozens of applicants, only a handful are chosen for each cohort, and the decision goes far beyond the product.

Martha Underwood, CEO and Founder of Prismm, says the CAFE impact has been life-changing.

“Participating in the CAFE accelerator was catalytic for Prismm. They don’t just offer great programming, they open doors,” she says. “Through CAFE, we were able to build meaningful relationships with financial institutions and gain membership into influential networks like the American Bankers Association and the American Fintech Council. That kind of access is invaluable. It shortens the distance between innovation and adoption, and for a founder building in a regulated industry, those connections can be the difference between a good idea and real market traction.”

Castell says: “At the end of the day, it is about the person. Even if the company is great, if the person is not aligned, it does not work.”

She looks for something specific.

“Are they collaborative. Do they want to help others. Do they really believe in what they are building.”

That emphasis runs counter to much of the startup world, where competition often dominates.

“This industry can be lonely and competitive,” she says. “What we have built is different.”

She calls it the CAFE family.

“That is the magic,” she says. “They stay connected. They collaborate. They support each other.”

 

That sense of community is not accidental. It is designed.

“We saw that founders needed more than capital,” she says. “They needed a network they could rely on.”

The results are beginning to take shape.

CAFE has worked with more than 38 companies, whose products now reach over 16 million people across the United States. Those companies serve hundreds of financial institutions, many focused on low- to moderate-income communities.

But Castell does not measure success only in numbers.

“The real success is the customer,” she says. “When a product actually gets into people’s hands and makes a difference.”

Some companies have partnered with each other after being introduced through CAFE, combining their solutions to go to market together. Others have built relationships with financial institutions that can take months or even years to fully develop.

“It is a long cycle,” she says. “But those relationships matter.”

The companies themselves are tackling real problems. Access to small business loans. Emergency savings for workers. Tools that help people find benefits they did not know they qualified for.

“A lot of it is not a completely new idea,” she says. “It is about doing it in a way that actually works for more people.”

That might mean making a process simpler. Or more accessible. Or more personalized at scale.

“It is about getting it into people’s hands,” she says.

Taken together, those changes point to something larger. A shift in how financial services are built and delivered.

 

At the center of that shift is a belief Castell returns to often.

“There is this misconception that this is just charity,” she says. “That it is nice to do, but not real business.”

She sees it differently.

“Profit and purpose go together,” she says. “This is not a tradeoff.”

For financial institutions, these technologies are not optional. They are necessary for growth.

“This is about how they serve customers, how they personalize, how they stay relevant,” she says.

In other words, doing better for customers is good business.

“These are real companies,” she says. “They are going to scale. They are going to be profitable. And they are going to help people.”

That same philosophy applies to founders.

“The number one thing we ask is why,” she says. “Because this is so hard. You have to believe in what you are building.”

It is that belief that carries them through.

Looking ahead, Castell sees CAFE continuing to grow, not just as a connector, but as a force shaping the future of financial services.

“If you build the right thing, for the right reason, and connect it to the right people,” she says, “you can change a lot more than just a company.”