Infinitus Systems raised a $51.5 million Series C in October 2024 led by Andreessen Horowitz. The round included participation from Memorial Hermann Health System, Kleiner Perkins, and Coatue Management.

The company previously raised a $30 million Series B in November 2021, with GV (Google Ventures) participating in earlier rounds. Prior funding included seed and Series A rounds.

Infinitus has raised a total of $102.9 million across all funding rounds since its founding. The Series C is the largest single round for the company.

Infinitus operates like an army of virtual call center agents named Eva that handle healthcare phone calls automatically. When a hospital registrar or specialty pharmacy representative would normally pick up the phone to verify benefits or check prior authorization status, Eva does it instead through software.

The system works by integrating directly into existing healthcare workflows through Epic, Salesforce, and other systems. A user simply pushes a button to run benefit verification, and Infinitus fetches the patient and therapy context, selects the appropriate payer phone number from its knowledge base, calls the payer, navigates phone trees, and returns structured data with over 150 fields per call.

For prior authorization follow-ups, Eva automatically checks status daily after staff submit electronic prior authorizations, pushing updates the moment a status changes from pending to approved or denied. This eliminates the manual work of repeatedly calling to check on authorization status.

The FastTrack AI Copilot serves teams that prefer to stay on calls themselves. It launches dozens of outbound calls in parallel, waits through phone system menus, then connects the human agent only when a live person answers, while automatically writing call notes.

The platform uses a multi-model architecture with hundreds of specialized AI components for speech recognition, natural language understanding, and conversation management. A dynamic healthcare knowledge graph continuously maps over 1,400 payers' phone systems, formularies, and authorization rules, built from more than 5 million conversations totaling over 100 million minutes.

Infinitus operates as a B2B SaaS platform that charges customers based on the volume of automated calls and tasks completed. The company integrates directly into existing healthcare technology stacks through APIs and native integrations with major electronic health record systems like Epic and Cerner.

The business model centers on replacing manual labor with AI automation. Healthcare organizations pay Infinitus to handle time-consuming phone-based tasks that would otherwise require human staff to sit on hold, navigate phone trees, and manually document call outcomes. This creates immediate labor cost savings for customers while generating recurring revenue for Infinitus.

Revenue scales with usage as customers expand the types of calls they automate and the volume of patients they process. The platform handles benefit verification, prior authorization status checks, provider directory updates, and patient outreach calls, creating multiple expansion opportunities within each customer account.

The company maintains a knowledge graph of payer phone systems and processes that becomes more valuable as call volume increases. This creates a data network effect where each additional call improves the system's ability to navigate complex healthcare bureaucracy, making the platform more effective for all customers.

Infinitus captures value by positioning itself as essential infrastructure between healthcare providers, payers, and patients. The platform processes structured data that feeds back into customer systems, making it deeply embedded in critical healthcare workflows rather than a peripheral tool.

Hyro focuses on inbound call routing and patient engagement for large health systems, with integrations into Epic and MyChart. The company has demonstrated results like 56% reduction in call abandonment rates for Tampa General Hospital but concentrates more on front-door patient interactions rather than complex revenue cycle management calls.

Syllable handles millions of calls for major health systems including NY-Presbyterian and Houston Methodist. The platform offers a DIY agent builder across voice, SMS, and chat channels but primarily addresses appointment scheduling and basic patient inquiries rather than the deep payer-facing workflows that Infinitus specializes in.

Notable Health positions itself as a comprehensive contact center AI solution that reads and writes directly into Epic and Cerner systems. The company claims significant labor savings for health systems and competes through deep EHR integration, contrasting with Infinitus's API-first approach that works across multiple systems.

Microsoft's Nuance platform leverages the company's healthcare AI capabilities and existing relationships with health systems. The integration with Microsoft's broader enterprise software stack provides a different competitive angle compared to pure-play healthcare AI companies.

Olive AI focuses on automating various healthcare operations beyond just phone calls, including prior authorization workflows and revenue cycle management. The company's broader scope of healthcare process automation creates overlap with Infinitus in some areas while addressing different pain points in others.

Optum and Availity operate payer-centric platforms that aim to digitize prior authorization and eligibility processes through FHIR APIs rather than phone calls. These platforms represent a structural shift toward eliminating phone-based processes entirely, which could reduce the long-term market for call automation solutions.

Change Healthcare and similar data networks focus on creating direct digital connections between providers and payers. The 2027 CMS FHIR mandates will require payers to expose authorization data through APIs, potentially reducing reliance on phone-based status checks.

The company has expanded beyond basic benefit verification into provider directory cleansing, prior authorization analytics, and patient-facing outreach campaigns. These new workflows leverage the same AI voice technology but address different pain points across the healthcare ecosystem.

SMART on FHIR app integration allows clinical staff to launch Infinitus workflows directly from within Epic, Cerner, and other EHR systems. This embeds voice AI capabilities into the daily workflows of physicians and nurses, expanding beyond traditional call center teams to the broader clinical workforce.

AI copilot products like FastTrack create a freemium entry point for organizations that want to maintain human involvement in calls while reducing wait times. This land-and-expand approach can introduce new customers to the platform before they adopt fully autonomous agents.

Life science companies operating patient support hubs represent a significant expansion opportunity. These organizations must demonstrate time-to-therapy metrics and medication adherence rates, creating demand for automated patient outreach and follow-up capabilities.

Medicare Advantage plans face stricter response time requirements under new CMS regulations, with 72-hour expedited and 7-day standard response times starting in 2026. This regulatory pressure creates urgency for automated prior authorization status checking and member communication.

Health system access centers struggle with an average of 12 hours per week per physician spent on prior authorization paperwork. Infinitus can address this administrative burden by automating the phone-based components of the authorization process.

Single-payer healthcare systems in Canada, the UK, and Australia still rely heavily on phone-based processes for specialty drug approvals and provider communications. Infinitus can adapt its voice agent technology and knowledge graph approach to these English-speaking markets with localized compliance and regulatory modifications.

Emerging markets that lack sophisticated electronic data interchange infrastructure continue to depend on call centers for healthcare administration. Bundling Infinitus with cloud contact center platforms could open Latin American and Middle Eastern markets where bilingual agents are scarce.

API displacement: The CMS FHIR mandates requiring payers to expose authorization and eligibility data through APIs by January 2027 could eliminate much of the phone-based processes that Infinitus automates. If digital data exchange becomes the standard, the market for call automation shrinks significantly.

Regulatory compliance: Healthcare AI faces increasing scrutiny around patient privacy, data handling, and clinical decision-making. Any changes to HIPAA requirements or new regulations around AI in healthcare could require significant platform modifications or limit deployment options.

Incumbent integration: Major EHR vendors like Epic and Cerner could build similar voice automation capabilities directly into their platforms, leveraging their existing customer relationships and data access. Healthcare organizations might prefer integrated solutions over third-party APIs for critical revenue cycle functions.