Startup SuperDial picked up $15 million in series A funding as voice AI agents are poised to be the next big artificial intelligence investment in healthcare.
The company, which initially was founded as SuperBill, a revenue cycle management company, built voice AI agents to automate high-friction phone calls for healthcare organizations. SuperDial, founded by former Stanford University classmates Sam Schwager and Harrison Caruthers, aims to help U.S. healthcare billing and provider organizations reclaim time and revenue by replacing hours of insurer calls with end-to-end AI agents.
Schwager and Caruthers initially built a healthcare billing company that spent thousands of hours on repetitive calls to payers. They saw an opportunity to automate the problem, and what started as an internal tool quickly grew into a standalone solution.
The company's voice AI agents handle outbound phone calls from providers and billing companies to insurers—navigating phone trees, waiting on hold and conducting live conversations with payer reps. The HIPAA and SOC2 Type 2-compliant AI agents support tasks like benefits verification, prior authorization, insurance claim follow-up, provider data validation and provider credentialing and enrollment.
When a call can’t be completed by an AI agent, SuperDial’s human call center team can step in.
The startup is banking on a future where healthcare coordination will be agent-powered—payers, providers, pharmacies, labs and other healthcare organizations will be able to communicate with one another, AI-to-AI.
SuperDial has seen "massive adoption" since late 2023 when the company pivoted from billing to automating phone calls, according to Schwager.
"These are not fun calls to make," Schwager said in an interview with Fierce Healthcare. "We've seen billing teams, after adopting SuperDial, achieve up to 4x productivity gains. If your job is to work through a backlog of claims every day, you're able to get through four times as many claims in a given day because you're not having to spend any time on the phone with the payer. We're just using the information that we're bringing back to handle higher ROI tasks like receiving a complex denial or submitting an appeal."
SuperDial has handled more than 1 million phone calls to date, Schwager said. "The rate at which we've gotten to that point as a new operator in the market is very exciting. We expect to be handling well past 10 million calls by the end of this year," he said.
SuperDial raised $15 million in new funding to scale its voice AI platform. SignalFire led the debt and equity series A round. Existing investors Slow Ventures, Box Group and Scrub Capital also participated in the round.
The funding includes $3 million in venture debt for SuperDial to invest in R&D and go-to-market initiatives. The company has now raised more than $20 million in funding.
It marks one of the first investments from SignalFire’s new $1 billion fund focused on applied AI.
"It was very clear to us during the process that SignalFire has very deep roots in healthcare and RCM especially, and they've been an excellent partner and have understood exactly what we do now and where we're heading," Schwager said.
The company will use the funding to build out a "world-class team," Schwager said, including AI engineers and additional staff for sales and marketing.
The company's customers include RCM companies and large provider organizations, including dental support organizations and management services organizations, that manage billing in-house. At West Coast Dental, SuperDial now handles more than 10,000 calls per month to check claim statuses, a process that previously left nearly 70,000 claims in backlog and would have required five new hires to process, according to the company.
With SuperDial, the West Coast Dental team has significantly reduced AR days and gained up-to-date visibility into claims, the company said.
SuperDial says its platform integrates with electronic health records and other systems of record to automate documentation, including writing back data gathered from calls, such as claims status updates.
Since launching at the end of 2023, the company has quickly scaled to seven figures in revenue, executives said.
Earlier this year, SuperDial acquired MajorBoost, a company that developed an AI-powered system to automate the process of waiting on hold and navigating insurance companies’ IVR phone trees. That acquisition augmented SuperDial’s existing voice AI capabilities.
SuperDial says it's tackling a massively expensive problem in healthcare. It's estimated that U.S. healthcare administrative spending is approximately $1 trillion annually.
Administrative spending makes up about 15% to 30% of national health spending, and wasteful administrative spending comprises half of that, or 7.5% to 15% of national health spending.
Many companies are building voice AI agents to tackle administrative tasks in healthcare as it's an area ripe for tech innovation to reduce manual labor, improve efficiency and cut costs.
Schwager asserts that SuperDial is distinctive due to its focus on the RCM problem space. "We are laser focused on these calls between billing teams and payers. Billions of these calls are made every year, across use cases. They're extremely expensive and burdensome, and we want to make them a thing of the past," he said. "We've built associated workflow-specific components such as interactive voice response tree navigation, phone number lookups, embedding RCM context in the virtual agent at call time, leveraging data from transactions we've completed previously in a HIPAA-compliant manner in order to improve the AI's performance; these are all part of the flywheel," he said.
SuperDial also sees opportunities to work with payers on the administrative side and currently has a paid trial with a large health insurance company, Schwager said.
"We're very interested in a future where SuperDial is embedded at the payers' side as well, and then, if a provider needs information on a claim, that they're able to use SuperDial to engage with SuperDial, thereby creating an AI-to-AI API transaction that's instantaneous, accurate and lower cost and more efficient for everyone," he said.
Healthcare never built the APIs to enable clean, system-to-system communication, according to Schwager. But SuperDial is building the next best thing: a network of AI agents that can navigate fragmented infrastructure on behalf of the organizations that rely on it.
The company plans to deepen its EHR integrations, expand to new administrative workflows and continue training its agents using real-world call data.
“SuperDial isn’t just automating phone calls—they’re building the connective tissue for how the healthcare ecosystem will communicate in the future,” said Yuanling Yuan, partner at SignalFire, in a statement. “We believe agentic AI infrastructure is inevitable, and SuperDial is leading that shift with rapidly growing traction and a team that deeply understands the problem. This is exactly the kind of applied AI we’re excited to back.”