Ellipsis Health

Ellipsis Health is a San Francisco-based healthcare technology company whose product, Sage, is an AI voice agent positioned as an "AI Care Manager." Sage places and receives autonomous care management calls on behalf of health plans, health systems, specialty care organizations and pharma, covering three main use-case groups: engagement and enrollment (program enrollment, benefits overview, eligibility verification, copay checks, patient questions); assessments and surveys (health risk assessments, care and discharge assessments, PRAPARE, HOS, NPS, HCAHPS and outcomes surveys); and clinical support (care coordination, medication and clinical adherence, Star Rating and quality-measure work, HEDIS gap closure, pre- and post-discharge check-ins, "Friday tuck-in" calls and transitions of care). The company describes the agent as multi-lingual, available 24/7, and intended for patients with complex physical, behavioral and social needs, who the company says drive the majority of healthcare costs.

The company's stated positioning is that healthcare organizations face rising patient complexity alongside shortages of trained clinical staff, and that Sage expands capacity so licensed staff can work at the top of their license. Earlier public descriptions of Ellipsis Health characterized it as a company using AI-generated vocal biomarker technology to identify, assess and monitor clinical anxiety and depression via the human voice, working through partnerships with providers, payers and digital health companies. That vocal biomarker work is described as the clinical foundation for the current Empathy Engine and Sage products.

Leadership includes founder and CEO Mainul Mondal, co-founder and Chief Medical Officer Michael Aratow, COO Melissa McCool, Chief Product Officer Angela Suthrave, Chief Commercial Officer Rafael Viturro, Chief Growth Officer Amanda Bury and Chief Nursing Officer Courtney Henchon. The board of directors and observers includes Vinod Khosla and Hal Paz of Khosla Ventures, Carter Prince of CVS Health Ventures, Amit Khanna of Salesforce and Emily Zhao of Salesforce Ventures, Cody Nystrom of SJF Ventures, Russell Hirsch of Generator Ventures, Helmy Eltoukhy and Avaya CEO Jeff Clarke. A clinical and AI advisory board includes Richard Socher, Tom Insel, Toby Cosgrove, Stephen Klasko and others.

Founding story

The company was founded by Mainul Mondal, who serves as CEO, with Michael Aratow as co-founder and Chief Medical Officer. Before Ellipsis Health, Mondal worked in management consulting on market-entry strategies for new technologies, helped launch the ClearStreme initiative with the Freeman Spogli Institute at Stanford University, and was a Rockefeller Fellow at the Public Health Institute. He was named a Milestone Maker by the Nasdaq Entrepreneurial Center in 2020.

Business model

Ellipsis Health sells Sage to healthcare organizations — health plans, health systems, specialty care managers and pharma — as an enterprise software service that replaces or augments human care-management outreach. Deployment follows a contracted implementation process with white-glove onboarding, custom prompt development based on the customer's existing scripts and protocols, phased rollout and joint call monitoring, followed by ongoing optimization and expansion.

The company positions Sage's value in terms of customer economics — reduced administrative workload, faster program enrollment and return on investment — but the sources do not specify pricing or contracting terms.

Traction

The company reports customer-facing outcomes of a 60% reduction in administrative tasks, 6x faster program enrollment and 4x return on investment. Press coverage citing the company's website states that Ellipsis works with UnitedHealth Group, Aetna (part of CVS Health), DukeHealth, Highmark and Main Street Health, among other healthcare organizations. Customer testimonials on the company site come from Vivid Health (CEO and co-founder Patrick Mobley) and Twin Health (Chief Medical Officer Lisa Shah).

Latest developments

In June 2025 Ellipsis Health announced the close of a $45 million Series A led by Salesforce, Khosla Ventures and CVS Health Ventures, with participation from existing investors Mitsui Global Investment, Collier, E12 and AME Cloud Ventures, and simultaneously unveiled Sage. The company said proceeds would go toward accelerating Sage adoption among providers, payers and care management organizations, expanding AI capabilities and deepening clinical integrations. The company has also announced partnerships with Salesforce, bringing Sage into Salesforce Health Cloud, and with NVIDIA for more natural AI care-management conversations.