Human Interest

The 401(k) Your Accountant Wishes Had Existed a Decade Ago

Right now, somewhere in America, a small business owner is doing something radical: offering their twelve employees a retirement plan. A bakery in Ohio. A landscaping company in Texas. A dental practice in Georgia. These are the employers retirement was never designed for - the ones who got priced out, buried in paperwork, or simply told by a broker that their headcount was too small to bother with.

Human Interest signed them up anyway. All 50,000 of them.

The San Francisco company has quietly become one of the fastest-growing retirement plan providers in the United States. Not by chasing the Fortune 500. By going after the businesses that traditional providers ignored - the restaurants, nonprofits, startups, and family shops that employ roughly half of the American workforce but cover a fraction of retirement savers. The math was always there. Someone just had to do the paperwork.

Half the Workforce. Almost No Coverage.

Here is a fact that should bother more people: roughly 57 million Americans who work for private-sector employers have no access to a workplace retirement plan. Not because they don't want one. Because their employer can't figure out how to offer one - or can't afford the brokers and administrators who traditionally ran the whole circus.

Traditional 401(k) plans were built for scale. The bigger the company, the better the deal. Small businesses pay higher per-employee administrative fees, face the same compliance headaches as major corporations, and get less hand-holding in return. The retirement industry, essentially, charged more to help less.

The result was a retirement gap that broke almost perfectly along class lines. Corner office employees got vesting schedules and employer matches. Warehouse workers and cafe staff got nothing, because nothing was cheaper than the paperwork.

A Harvard Grad, a Y Combinator Batch, and a Hunch About Paperwork

Roger Lee and Paul Sawaya started Human Interest in 2015 with a premise that sounds obvious in retrospect: the main reason small businesses didn't offer retirement plans wasn't money. It was complexity. The administration, the compliance filings, the IRS rules, the plan documents - all of it could, in theory, be automated. Software could do what a room full of actuaries used to charge for.

They went through Y Combinator in the summer of 2015 under the name Captain401 - a name that still lives on in their GitHub organization, a small piece of founding mythology preserved in code. The company rebranded to Human Interest in 2018 as its ambitions grew past the startup-friendly brand.

Jeff Schneble, who brought a physics PhD from Cambridge and an MBA from Harvard to a career in venture capital, joined the board during the Series A and became CEO in 2019. His background - semiconductor physics, finance, operations - proved oddly suited to a company that needed to simultaneously understand IRS regulations, payroll software APIs, and institutional investor expectations.

One Platform. 500 Payroll Integrations. Zero Transaction Fees.

The Human Interest platform handles everything an employer would otherwise have to coordinate across three different vendors: recordkeeping, compliance testing, plan administration, and employee investment management - all in one place. When payroll runs, contributions sync automatically. When the IRS requires annual nondiscrimination testing, the platform does it. When an employee wants to change their contribution rate, they do it themselves through the app.

The 500+ payroll integrations are not a footnote - they're the product. Competitors typically integrate with a handful of major payroll providers. Human Interest built connections with 500, which means a barbershop using an obscure regional payroll processor gets the same seamless experience as a tech startup using Gusto. That breadth is hard to replicate and harder to steal.

50,000 Employers. 2,000 New Ones Every Month.

The numbers that matter aren't the funding rounds. They're the onboarding pace. Human Interest adds roughly 2,000 new employer clients every month - one new plan every twenty-two minutes, around the clock. At that rate, the question isn't whether they're growing. It's whether the retirement industry is paying attention.

The PartnerConnect platform, launched in April 2025, extended the company's reach through a channel it had been quietly building for years: financial advisors. Rather than competing with the 650+ advisory firms already recommending Human Interest plans, the platform gave them a control room - a single dashboard to manage every client plan, track investment performance, and handle compliance from one place. Within months, 500+ firms were using it to manage nearly 5,000 client plans.

The UBS deal, announced in March 2026, is the most telling signal yet. UBS Financial Advisors - more than 5,000 of them - now have access to Human Interest's technology-first 401(k) solutions. It's the kind of institutional validation that takes years to earn and seconds to announce.

$710M and Counting

Human Interest has raised from some of the most prominent names in institutional finance - a signal that the smart money believes the SMB retirement market is larger than it looks from the outside.

Retirement Savings for the Rest of Us

Human Interest describes its mission plainly: ensure that people in all lines of work have access to retirement benefits. It reads like a corporate boilerplate. It isn't. It's a direct response to a structural failure in how American retirement savings were designed - for large employers, by financial institutions that needed large fee pools to make the math work.

The company's inclusion on Fortune's Impact 20 list - which highlights venture-backed startups driving meaningful social change - points to something real. Making 401(k) plans accessible to a restaurant that employs twenty people isn't just a business model. It changes what retirement looks like for a dishwasher in Cleveland or a dental hygienist in Tucson.

The culture reflects this. Great Place to Work certified for consecutive years. A Glassdoor rating of 4.2 out of 5. A workforce of roughly 700 that apparently believes the work matters - which, in a fintech company selling something as unglamorous as compliance testing and payroll deductions, is genuinely difficult to fake.

The Retirement Crisis Meets Its Software Fix

The American retirement system is heading toward a reckoning that everyone can see and almost no one is solving. Social Security faces long-term funding pressures. Defined benefit pensions have nearly vanished from the private sector. Individual savings rates remain stubbornly low. The people most exposed to this reckoning are, not coincidentally, the same ones working for the employers Human Interest is chasing.

SECURE Act 2.0, passed by Congress in late 2022, expanded tax credits for small businesses that start retirement plans. State-mandated retirement programs are rolling out across the country, creating regulatory pressure for employers who had previously chosen to do nothing. The tailwinds that were always theoretical are starting to look structural.

Human Interest's embedded retirement platform - now in its third generation - positions the company to power retirement offerings through other providers entirely. White-label 401(k)s for payroll companies, HR platforms, and financial services firms. The company that started by going directly to small employers is quietly building the infrastructure that could let any software company offer retirement plans as a feature.

Back to that small business owner doing something radical: they're no longer alone. Fifty thousand of them made the same call. Two million employees are now saving for retirement who weren't before. The problem Human Interest was built to solve hasn't gone away - but it's getting smaller, one 10-minute plan setup at a time.