Hippocratic AI vs Lumeris Tom (2026)
Hippocratic AI rents out clinically tested voice agents by the hour. Health systems, insurers and pharmaceutical companies use them for calls such as medication adherence checks, chronic care check ins, adverse event intake and appointment booking, in English, Spanish and other languages. The agents stay out of diagnosis, prescribing, hospice, mental health disorders and children under two, and hand off to a human nurse mid conversation. Polaris 6.0 Nano starts at $2.50 an hour and Ultra at $15, and the company holds HITRUST e1. Lumeris Tom is the AI that Lumeris, a value based care company in St. Louis, deploys inside its primary care partnerships with health systems, physician groups and payers. Its Best Next Action engine reads claims, EHR feeds, labs and hospital events for each patient and picks the next step, and a conversational agent then calls or texts patients with reminders, education and follow up. Symptom checks run on licensed Schmitt-Thompson triage content and end with a summary and priority for the care team. Lumeris often shares financial risk with partners and publishes no price. The deeper difference is who decides whom to call. A Hippocratic customer chooses the program and buys the conversations; with Tom, Lumeris's engine ranks the population and the agent works down that list as part of a wider contract. Hippocratic publishes clinician testing for every model version; Lumeris says Tom ensures nothing gets missed and gives no figure behind it. Hippocratic claims HIPAA compliance without business associate terms, while Lumeris states no HIPAA position for Tom. An organization staffing its own programs is Hippocratic's buyer; one seeking a partner to run value based primary care is Lumeris's.
- Buyers pick from more than 1,000 prebuilt agents across provider, payer and pharma programs, or design their own and have them tested by nurses before launch.
- Pricing is set per hour by model size, from Nano for administrative calls to Ultra for the most clinical conversations.
- A published scope keeps the agents out of diagnosis, prescribing, hospice, mental health disorders and children under two.
- Clinician testing results are published for each Polaris version, and a 2025 peer reviewed WellSpan study of 1,878 patients measured its colorectal screening outreach.
- Best Next Action reranks every patient's next step as claims, labs, medications and hospital events arrive, drawing on more than 200 risk models.
- Symptom checks follow licensed Schmitt-Thompson triage guidelines and finish with a structured summary and recommended priority for the care team.
- Tom comes with Lumeris's value based care enablement, from payer contracting to physician coaching, often with shared financial risk.
- It works across Medicare Advantage, ACO REACH, MSSP, Medicaid and commercial programs, and Lumeris reports more than 1.4 million lives on the platform.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Hippocratic AI and Lumeris Tom are each graded against the same capability taxonomy, from each vendor's own public materials and the regulatory record, under the AI Health Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Fact | Hippocratic AI | Lumeris Tom |
|---|---|---|
| Primary category | Patient Voice Agents | Patient Voice Agents |
| Founded | 2023 | 2010 |
| Headquarters | Palo Alto, California | St. Louis, Missouri, and Cambridge, Massachusetts, United States |
| Website | hippocraticai.com | lumeris.com |
Side by Side
Select any grade to read the note behind it.
Each vendor in one paragraph
Written to be quoted whole. Each paragraph states what the AI Health Index verified about the vendor, with the caveats attached.
Hippocratic AI sells clinically tested AI voice agents by the hour, from $2.50 for its Polaris 6.0 Nano model to $15 for Ultra at the lowest rate, to health systems, insurers and pharma and medtech companies for calls such as adherence checks, chronic care follow up and adverse event intake. Its agents exclude diagnosis, prescribing, hospice, mental health disorders and children under two, schedule straight into Epic, Cerner and other record systems, and transfer to human nurses when needed. A network of more than 7,700 clinicians checks its models before release, and it carries HITRUST e1. The open questions are business associate terms and a privacy policy for patient calls, neither of which is published, the use of patient calls to train its models, and urgency routing with no regulatory position stated.
Source: AI Health Index, November 2026
Lumeris Tom is the AI primary care platform Lumeris sells to health systems, physician groups and payers as Primary Care as a Service, usually alongside its value based care enablement and shared risk arrangements. Its Best Next Action engine ranks each patient's next step from claims, EHR, lab and hospital data, and a conversational agent reaches patients by phone or text, running symptom checks on Schmitt-Thompson triage content and handing summaries to the care team. Lumeris reports more than 1.4 million lives on the platform and builds on Google Cloud. Against that scale, Lumeris says Tom ensures nothing gets missed with no figure behind it, publishes no price, HIPAA or business associate terms for Tom, names no security certification, and offers no study of Tom's own outreach or symptom checks.
Source: AI Health Index, November 2026
Questions buyers ask
How does Hippocratic AI compare with Lumeris Tom?
Hippocratic AI and Lumeris Tom both reach patients by phone and text, but they are bought differently. Hippocratic sells AI agents by the hour to providers, health plans and drug makers, who choose which programs to run. Lumeris Tom comes inside a value based care partnership with Lumeris, where its Best Next Action engine decides which patients need attention and the agent follows up, often with Lumeris sharing financial risk. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified November 7, 2026. No vendor pays for placement.
Which of Hippocratic AI and Lumeris Tom checks patients' symptoms?
Lumeris Tom runs symptom checks using licensed Schmitt-Thompson telehealth triage content and gives the care team a structured summary with a recommended priority. Hippocratic AI says its agents do not diagnose, though a Polaris 6.0 scheduling skill sorts appointments by urgency using a protocol it does not name. Neither Lumeris nor Hippocratic states a regulatory position for these steps. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified November 7, 2026. No vendor pays for placement.
How much do Hippocratic AI and Lumeris Tom cost?
Hippocratic AI publishes hourly rates for its Polaris 6.0 models at the lowest rate, from $2.50 for Nano and $5 for Flash to $10 for Pro and $15 for Ultra. Lumeris publishes no price for Tom; it is sold as Primary Care as a Service, often packaged with value based care enablement in which Lumeris shares risk, and how Tom itself is charged is not stated. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified November 7, 2026. No vendor pays for placement.
How do Hippocratic AI and Lumeris Tom handle security and patient data?
Hippocratic AI lists HITRUST e1 and a SOC 2 report, releases reports through a trust portal on request, and claims HIPAA compliance, though its only privacy policy covers its website and apps. Lumeris states no HIPAA or business associate position for Tom and names no security certification, describing a secure architecture on Google Cloud.
Hippocratic says patient calls train its models, Lumeris does not say whether Tom's calls or records train any model, and neither publishes a retention period. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified November 7, 2026. No vendor pays for placement.
How does K Health differ from Hippocratic AI and Lumeris Tom?
K Health sells PatientGPT, an assistant a health system places in its own portal, website and phone line, answering patients from their medical record and booking visits under rules the health system writes. Unlike Hippocratic AI's program agents or Lumeris Tom's partnership model, K can also supply its own physicians for virtual care, and its clinical engine was evaluated in Annals of Internal Medicine in 2025. K publishes no price. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified November 7, 2026. No vendor pays for placement.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers.
Neither vendor reports how its agents perform for older callers, other languages or any other patient group, or publishes business associate terms for patient calls. Hippocratic AI does not name the base model under Polaris 6.0, its published privacy terms stop at the website, and its trust portal releases reports on request. Lumeris names no model behind Tom and publishes no HIPAA position, security certification or price for it, and its savings and quality figures describe its enablement partnerships rather than Tom.
Ask Hippocratic AI which calls run with no person on the line and what protocol sits behind its symptom assessment.
Ask Lumeris what evidence stands behind the claim that Tom ensures nothing gets missed, what a patient hears during a symptom check before the care team acts, and what agreement governs patient data inside Tom.