American workers can choose their own retirement funds, their own mortgage lenders, their own streaming services. But when it comes to health insurance, most of them get handed a packet and told to pick from column A or column B. Thatch, a San Francisco-based health benefits company, thinks that’s the core problem, and it just raised $108 million to prove its answer works.
The Series C round brings Thatch’s valuation to $1 billion. Returning investors include Andreessen Horowitz, General Catalyst, Index Ventures, and Scale Venture Partners. But the more telling names are the new strategic backers: Eli Lilly, ADP Ventures, and Paychex. When pharmaceutical and payroll giants put money into a benefits startup, it’s a signal that established players see the underlying model shifting, not just a promising early-stage bet.
What Thatch actually does
The company’s model is built on Individual Coverage Health Reimbursement Arrangements, or ICHRAs, a benefit structure that lets employers give employees a fixed dollar amount to buy their own health insurance rather than selecting a group plan on their behalf. Employees choose a plan that fits their situation, and whatever is left in their budget can be spent on other health services, including therapy, GLP-1 medications purchased outside insurance, or preventive diagnostics.
Thatch’s platform manages the compliance, reimbursement, and employee experience that makes ICHRAs workable at scale. That operational layer is what the company is actually selling. The ICHRA framework has existed since 2020, but adoption has been slow because the administrative burden on employers has historically been high. Thatch is betting it can remove enough of that friction to make consumer-directed benefits the default, not the exception.
Growth numbers that are hard to ignore
The company reports that annual recurring revenue has grown nearly sevenfold over the past twelve months. It now supports more than 5,000 employers. Since its Series B in April 2025, Thatch has also expanded its distribution, embedding directly into Gusto, Justworks, and Paychex so that small businesses can access its platform without a separate onboarding process. It has deepened integration with ADP’s RUN payroll platform and brought in employers and brokers from Venteur after acquiring that book of business.
Thatch also launched Thatch Market, a curated set of health and wellness services employees can pay for using their tax-free benefit dollars. Current offerings include Lyra Health for mental health support and Function Health for biomarker testing. The marketplace model makes sense strategically: it expands the perceived value of the budget employees receive and gives Thatch a platform play beyond pure benefits administration.
Why the timing matters
Group health insurance premiums have risen faster than wages for years. Employers, particularly small and mid-sized ones, are under real financial pressure, and the traditional benefits model offers little flexibility in response. ICHRAs let employers set a defined contribution and shift the purchasing decision to employees, which changes the cost structure meaningfully.
Thatch’s co-founders argue that 2027 will be the strongest growth year yet for ICHRA adoption nationally. That’s a reasonable prediction if regulatory conditions hold and awareness among brokers and HR teams continues to build. The category is still early, but the conditions that created 401(k) adoption in retirement, which are cost pressure, portability, and individual choice, are all present in health benefits today.
- $108 million raised in Series C funding
- Valuation reaches $1 billion
- Nearly 7x revenue growth over the past twelve months
- More than 5,000 employers on the platform
- Integrations with Gusto, Justworks, Paychex, and ADP RUN
- Thatch Market launched with health and wellness service partners
The new capital is earmarked for product development, deeper carrier relationships, additional payroll integrations, and improving the member experience. For clinicians and health entrepreneurs watching employer benefits reform from the outside, Thatch’s trajectory is worth tracking. If consumer-directed benefits reach meaningful scale, the downstream effects on how patients engage with care, and which services they choose to pay for directly, could reshape demand patterns across the whole system.