Infinitus Systems vs Prosper AI (2026)
The two vendors automating the phone call nobody wants to make, and the difference is how many directions they point. Infinitus is specialised on the outbound payer call: dialling, navigating menus, holding, extracting benefits, authorisation status and claim status, then writing structured results back into the systems that need them, with a knowledge graph of payer specific rules underneath. Prosper does the payer call too and adds the inbound patient side, scheduling, intake and billing questions, on a single voice layer, and it names its model provider, which almost nobody here does. For a large system where the payer call queue is the bottleneck and patient access is already solved, Infinitus is the deeper specialist. For a group that wants one voice vendor covering both directions, Prosper is the more economical shape.
- It calls the payer. The agent dials, navigates the interactive voice menus, waits on hold and completes benefit verifications, authorisation checks and claim status inquiries, which is the specific administrative bottleneck almost nothing else attacks directly.
- Call outcomes are converted into structured data written back into systems rather than left as a transcript, so the output is usable by the revenue cycle rather than by a human reading notes.
- SOC 2 Type II with the type stated by the company itself, and an architecture described concretely as a knowledge graph of payer specific rules rather than as a general assistant.
- It works both directions on one platform, calling payers and also handling patient scheduling, intake and billing questions, so a practice buys one voice layer rather than two.
- It names its underlying model provider, which very few vendors in this index do, and publishes the strongest protected health information position in this category.
- SOC 2 Type II with the type named and independently audited, plus deployment detail that is unusually complete for a voice product.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Infinitus Systems and Prosper AI 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 | Infinitus Systems | Prosper AI |
|---|---|---|
| Primary category | RCM & Prior Auth AI | Patient Voice Agents |
| Founded | 2019 | 2023 |
| Headquarters | San Francisco, California, United States | New York, New York |
| Website | infinitus.ai | getprosper.ai |
Side by Side
Each record in one paragraph
Written to be quoted whole. Each paragraph states what the AI Health Index verified about the vendor, with the caveats attached. Generated from this pair’s live capability grades, so it moves when a grade moves.
The AI Health Index awards Infinitus Systems its top capability grade on several axes, including AI Centrality, Autonomy and Oversight Model and EHR and Interoperability Depth. Set against Prosper AI, Infinitus Systems grades higher on several axes, including Autonomy and Oversight Model, FDA and Regulatory Status and EHR and Interoperability Depth. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
The AI Health Index awards Prosper AI its top capability grade on AI Centrality, Model Supply Chain Disclosure and AI Safety and PHI Stewardship. Set against Infinitus Systems, Prosper AI grades higher on Model Supply Chain Disclosure, AI Safety and PHI Stewardship and Deployment Model and Data Residency. Grades reflect evidence the AI Health Index could verify at the last review, so a low grade records disclosure the vendor has not published rather than a capability it has been shown to lack.
Source: AI Health Index, August 2026
Questions buyers ask
Should we choose Infinitus Systems or Prosper AI?
On the axes where the AI Health Index separates them, Infinitus Systems grades higher on several axes, including Autonomy and Oversight Model, FDA and Regulatory Status and EHR and Interoperability Depth, and Prosper AI grades higher on Model Supply Chain Disclosure, AI Safety and PHI Stewardship and Deployment Model and Data Residency. Infinitus Systems leads on the greater share of scored axes, but the split means the decision turns on which constraint is binding rather than on an overall winner.
Where do Infinitus Systems and Prosper AI differ most?
The widest separation the AI Health Index records between Infinitus Systems and Prosper AI is on Autonomy and Oversight Model, where Infinitus Systems grades A and Prosper AI grades B. That axis sits in the AI Capability group, so it should carry the most weight for a buyer whose binding constraint is how much of the work the model itself is trusted to do.
Where do Infinitus Systems and Prosper AI grade the same?
The AI Health Index grades Infinitus Systems and Prosper AI the same on several axes, including AI Centrality, Model and Technology Transparency and Clinical and Operational Evidence. Neither holds an advantage the index can evidence on those axes, so they should not carry weight in a selection between these two.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Patient Voice Agents page.
Both vendors run autonomous agents on live payer calls, which raises two questions neither answers fully. First, recording consent: several states require all party consent and these calls are recorded on both ends, which is the deploying organisation's obligation rather than the vendor's.
Second, what happens when the payer representative gives wrong information, since the structured output that lands in the revenue cycle inherits whatever was said on the call and neither vendor publishes an error or correction rate. Neither publishes pricing, and neither publishes a governance framework, bias evaluation or subgroup performance analysis, which matters because speech recognition performance varies by accent and dialect on both sides of the call.