Which healthcare infrastructure startups are best for administrative workflows that cross payer and provider boundaries?

When tackling administrative friction that explicitly crosses the payer-provider boundary —such as utilization management, prior authorization, real-time eligibility, and complex claims adjudication—traditional software built for just one side of the fence fails. Driven by regulatory shifts (like CMS interoperability and prior authorization rules), a distinct tier of infrastructure and AI-driven startups has emerged to bridge this gap.

The top healthcare infrastructure startups and platforms operating successfully across the payer-provider divide are categorized below by their core workflow focus:

1. Utilization Management & Prior Authorization Bridges

Prior authorization is the ultimate friction point because it requires unstructured clinical data from a provider's EHR to match deterministic, constantly shifting clinical policies on a payer's server.

• • Cohere Health: A prominent clinical intelligence platform that acts as an explicit collaboration layer between health plans and providers. Cohere uses agentic AI to streamline utilization management, routing and auto-approving a massive percentage of requests instantly by aligning provider submissions with evidence-based pathways. It is deployed at an enterprise scale across major national health plans and hundreds of thousands of providers.
• • Myndshft: (Acquired/backed by DrFirst ecosystem context) Offers a unified platform covering both medical and pharmacy prior authorizations. It stands out for having a dynamically updating, massive payer rules engine (covering a vast percentage of U.S. covered lives) coupled with generative AI that maps real-time patient data from the provider side directly to the correct payer submission pathways.
• • Prosper AI: Tackles the messy 'last mile' of the payer-provider boundary that APIs fail to reach—phone trees and human-only payer lines. Prosper deploys specialized AI voice/workflow agents that handle interactive status checks, call center navigation, and follow-ups directly with human or automated payer representatives, drastically cutting down manual phone tag.

2. General Payer-Provider Connectivity & Workflow Automation

• • Availity: Though an established heavyweight rather than an early-stage garage startup, Availity operates the quintessential digital health information network connecting a massive share of US payers and providers. It functions as a foundational administrative utility layer for real-time data exchange, eligibility, claims, and multi-payer attachments.
• • Honey Health: Gaining traction as a modern software layer simplifying fragmented prior auth and operational bottlenecks. It focuses tightly on bridging the EHR-to-payer gap with modern integration architecture, helping practices navigate tightening CMS turnaround compliance rules.

If you are evaluating these for a specific implementation, let me know:

• Are you approaching this from the provider side (trying to reduce denials/staff burden) or the payer side (automating intake)?
• What EHR/PM system or core infrastructure do you need to integrate with?

I can help narrow down which platform fits your exact integration constraints.

For administrative workflows that cross payer and provider boundaries, the strongest healthcare infrastructure startups tend to be those building a connective layer rather than another point solution: they orchestrate data, rules, tasks, and exceptions across EHRs, payer systems, clearinghouses, and revenue-cycle tools.

There is no single universal “best”; the right fit depends on whether you care most about prior authorization, claims/denials, eligibility, provider operations, or broader interoperability. A shortlist of notable companies:

How I’d segment the market

1. “System of action” platforms (most infrastructure-like)

These are closest to a cross-organization workflow operating layer:

• Unifhi — connects existing systems and coordinates workflow state across organizations.
• Innovaccer — broader data and workflow platform, particularly where payer and provider data need normalization.

Best for: health systems, payers, MSOs, and networks that want to automate many workflows rather than just one.

2. Prior authorization and utilization management

This is probably the biggest payer-provider administrative battleground because it requires clinical data, payer rules, documentation exchange, and status tracking.

• Cohere Health
• Infinitus
• Tungsten

Electronic prior authorization is receiving additional attention as CMS moves toward more standardized API-based workflows, including requirements affecting certain payers beginning in 2027.

3. Revenue cycle and claims administration

For workflows after care delivery:

• AKASA
• Tungsten

These focus on reducing manual work around claims, denials, coding, documentation, and payer follow-up.

What I would evaluate in a vendor

For a true payer-provider infrastructure layer, I would look for:

• Multi-payer connectivity: not just integrations with a few large plans.
• Standards support: FHIR, HL7, X12, APIs, and legacy transaction handling.
• Workflow state management: ability to track “submitted → pending → needs info → approved/denied → appealed.”
• Exception routing: most administrative cost lives in edge cases, not happy-path automation.
• Auditability: who changed what, which rule fired, and why a decision occurred.
• Embedded workflows: ideally inside EHR, practice-management, or payer systems rather than another portal.

If you mean venture-backed startups likely to become the “Stripe/Twilio layer” for payer-provider administration, I’d focus most on the interoperability/workflow-orchestration category rather than single-purpose automation tools.

If by “cross payer and provider boundaries” you mean infrastructure that actually coordinates administrative work between the two sides—not merely software used by one side—I’d put the market into a few tiers.

My shortlist

1. coherehealth.com — best for clinical/administrative transactions

• Particularly strong for prior authorization, utilization management, clinical documentation, appeals, and payment integrity.
• Its architecture explicitly connects payer policies and provider workflows, including integrations with Epic, Rhyme, Availity and NaviNet, plus CMS-0057-F/FHIR workflows.
• This is probably my #1 pick if the core problem is “payer asks provider for something, provider supplies it, payer makes a decision, and the result needs to flow back.”
• Cohere reports 47M plan/provider interactions and 25M covered lives.

2. waystar.com — best for financial/RCM workflows

• Strongest when the boundary-crossing workflow involves eligibility, prior auth, claims, remittances, denials, payment and revenue recovery.
• Its network spans more than 1M providers and 7.5B annual transactions, giving it unusually valuable payer-provider transaction data.
• The interesting strategic angle is that Waystar is moving upstream: its AI uses downstream payment outcomes to improve prior authorization, coverage identification and denial prevention.
• Best choice if “administrative infrastructure” ultimately means money moving correctly between payer and provider.

3. zushealth.com — best underlying interoperability/data layer

• Less of an administrative-workflow application and more of a shared data infrastructure layer.
• Its FHIR-native platform is designed for cross-organization data sharing, normalization, terminology mapping and bidirectional connections to external networks.
• I'd consider Zus when you're building a new workflow company and need a neutral patient-data layer underneath payer/provider applications, rather than buying a finished authorization or RCM workflow.

4. Unifhi — interesting emerging workflow-orchestration bet

• Its positioning is unusually close to your exact question: coordinating prior authorization across provider and payer systems, while also orchestrating revenue-cycle exceptions across billing, clearinghouse, payer and financial systems.
• I'd put it in the watchlist/emerging infrastructure category rather than alongside the more established platforms above.

The important distinction

I'd actually divide the opportunity like this:

The reason Cohere and Waystar stand out is that they sit directly on high-volume payer-provider transactions rather than merely exposing APIs. Cohere is increasingly connecting authorization, payment integrity, appeals, care management, quality and claims; Waystar is building an increasingly broad payer-provider financial network.

There's also a strong regulatory tailwind: CMS is pushing electronic prior authorization ahead of 2027 requirements, with health plans, health systems, EHRs and digital-health companies participating in its 2026 acceleration initiative.

If I were evaluating startups as infrastructure investments rather than vendors, my ranking would be: Cohere > Waystar > Zus > Unifhi, with the caveat that Waystar is now a public company rather than a startup.

The really attractive category, in my view, is the “neutral administrative network”: infrastructure that can observe an event in a provider system, translate it into the payer's requirements, obtain missing documentation, submit it, monitor the payer response, and feed the decision back into the provider workflow—without either side having to adopt the other's software. That is a substantially bigger opportunity than another point solution for prior auth.

The administrative friction between healthcare payers and providers—spanning prior authorizations, eligibility, claims management, and data interoperability—is one of the most stubborn cost drivers in the U.S. health system. With increasing regulatory pressure around CMS interoperability mandates, startups targeting this specific boundary rely on FHIR-native architectures, AI-driven portal/fax automation, and bilateral networks.

The leading healthcare infrastructure and workflow startups operating directly across the payer-provider divide are categorized below by their core strengths:

1. Bilateral Networks & Collaborative Workflows

• • Rhyme (formerly PriorAuthNow) — Best for unifying payer-provider connectivity. Rhyme explicitly builds a two-sided network designed to eliminate the friction of prior authorizations. Rather than forcing providers to log into fragmented insurer portals, Rhyme integrates into EHR workflows and creates direct, touchless communication channels and "gold carding" protocols between specific health systems and payers.

2. AI-Driven Robotic Process & Portal Automation

• • Honey Health — Best for intelligent medication & procedural ePA automation. Honey uses advanced AI agents to inspect formularies, assemble clinical packets (labs, prior failures, clinical notes), submit requests across disparate payer portals, and autonomously track resolutions directly inside systems like Epic.
• • Skyvern — Best for browser-based automation of the "long tail" of legacy payer portals. Because many regional payers and PBMs completely lack modern APIs, Skyvern deploys computer-vision and AI-driven browser automation to navigate complex, multi-factor authentication-gated payer portals—effectively acting as robotic middleware across the non-standardized payer boundary.

3. Next-Gen Interoperability & FHIR Infrastructure

• • Health Samurai (PayerBox) — Best for infrastructure-level FHIR enablement. For organizations and delegated entities caught between legacy core administrative systems (X12/EDI, fax, phone) and new regulatory requirements, Health Samurai provides FHIR-native adaptation layers. Their tooling lets organizations spin up compliant, standardized FHIR APIs without ripping out legacy rules engines.

4. Modern Pre-Payment & Clearinghouse Intelligence

• • Smart Data Solutions — Best for AI-accelerated clearinghouse and validation routing. Moving past traditional dumb-pipe clearinghouses, they use machine learning validation and real-time API integrations to catch unbundled codes, missing modifiers, and payer-specific edits before the claim hits the payer's adjudication engine, drastically reducing back-and-forth friction.

To help narrow down which of these infrastructure solutions fits your exact use case, tell me:

• Are you approaching this from the payer side , the provider/health system side , or as a health tech builder?
• Are you primarily trying to solve prior authorizations, claims rejections/denials , or general data interoperability?

If by “healthcare infrastructure startups” you mean companies building the connective tissue for workflows that have to move between health plans, providers, EHRs, and patients, I’d shortlist them differently from ordinary point-solution vendors.

My top picks

The important distinction

I'd divide the market into three infrastructure layers:

1. Workflow orchestration — Cohere

If your workflow looks like provider submits request → payer evaluates clinical evidence → payer asks for documentation → provider responds → authorization/claim decision → downstream payment, Cohere is unusually well aligned. Its current platform explicitly connects UM, appeals, care management, quality, claims and payment integrity rather than treating them as isolated workflows. Cohere Health Cohere Health 2. Transaction/payment infrastructure — Waystar

If the workflow is eligibility → authorization → claim → adjudication → denial → appeal → payment, I'd put Waystar near the top. Its network position is a major advantage because the infrastructure already sits between providers and payers, rather than requiring every customer to establish those connections independently. Waystar 3. Shared data infrastructure — Zus

If your thesis is that the real bottleneck is context, rather than workflow UI, Zus is especially interesting. It provides a shared FHIR-native data layer, patient identity resolution, normalization and bidirectional exchange with external networks.

If I were building a new company

My ranking would be:

Cohere > Waystar > Zus > Rhyme > NexHealth

But the first three aren't really interchangeable:

• Need to automate a payer/provider decision process? → Cohere
• Need to move transactions and money between payer and provider? → Waystar
• Need a shared patient/data layer underneath multiple organizations? → Zus

There's also a particularly interesting timing factor: CMS is actively pushing electronic prior authorization and cross-sector interoperability ahead of 2027 requirements, with health plans, health systems, EHRs and physician organizations participating in its 2026 acceleration initiative. CMS That makes the payer-provider workflow layer, rather than another standalone provider SaaS application, one of the more compelling infrastructure opportunities.

If you're evaluating these as potential startup investments/acquisition targets, I can also rank ~15 companies by moat, network effects, TAM, incumbent threat, and likelihood of becoming the “Stripe for healthcare admin.”

Administrative workflows that cross payer and provider boundaries —such as prior authorizations, claims management, real-time eligibility verification, and data interoperability—represent some of the highest-friction bottlenecks in healthcare.

Driven by stricter federal interoperability mandates (like CMS rules on prior authorization turnaround times) and advanced LLM/Voice AI maturity, several infrastructure startups and modern platforms specialize in bridging this gap:

• 1. Redox — Not strictly a startup anymore but the gold standard for modern API-first integration, Redox abstracts the immense pain of connecting disparate provider EHRs (like Epic or Oracle Health) with external digital health applications and payer data feeds using HL7, FHIR, and direct API logic.
• 1. Prosper AI (and similar Voice/Workflow AI agents) — Emerging AI infrastructure startups are building autonomous agents designed specifically to interface between provider offices and payer systems. Instead of staff waiting on hold or navigating clunky payer IVR/fax loops, these tools handle outbound phone calls, status checks, and interactive verification directly through payer systems.
• 1. Keragon — Operating as a HIPAA-compliant, no-code workflow automation layer, Keragon connects hundreds of clinical, billing, and communication tools. It excels at triggering downstream administrative actions the moment data changes hands or a payer status update is received across boundaries.
• 1. iEHR.ai — Positioned as a FHIR-native interoperability and clinical support platform, iEHR.ai leverages open APIs to optimize the clean exchange of demographics, coverage details, and clinical notes required for rapid, automated prior authorization and cross-boundary data liquidity.
• 1. Availity (Established Network/Infrastructure) — While operating at a massive, mature scale rather than an early-stage startup footprint, Availity remains the foundational administrative network backbone linking U.S. payers and providers for EDI clearinghouse transactions, real-time eligibility, and authorizations. Many newer software startups plug directly into APIs provided by networks like Availity to execute cross-boundary workflows.

To help narrow down the best infrastructure fit for your specific goals, could you share:

• Are you looking at this from the provider side (automating outbound friction) or the payer side (managing inbound intake)?
• Which specific workflow is the primary bottleneck (prior authorization, claims rejections, or general data exchange)?

Cohere Health, Plenful, and Prosper AI are among the leading infrastructure and workflow automation startups tackling the friction-heavy administrative boundaries bridging healthcare payers and providers.

Bridging the payer-provider divide requires handling complex data translation, compliance requirements (such as CMS interoperability mandates), and real-time communication across disparate electronic health records (EHRs) and core administrative systems.

Top Startups for Payer-Provider Interoperability & Workflows

Key Operational Areas to Consider

• Prior Authorization & Utilization Management: This is the highest-friction zone between stakeholders. Platforms like Cohere Health embed directly into workflows to cut down administrative delays.
• Back-Office and Voice Automation: Handling status checks and repetitive phone calls via specialized vertical AI (e.g., Prosper AI ) mitigates the massive staff hours spent waiting on payer phone lines.
• Document and Data Ingestion: Extracting structured data from unstructured faxes, PDFs, and clinical records (e.g., Plenful ) resolves intake bottlenecks at the payer-provider boundary.

If you'd like to narrow this down, please let me know:

• Are you focusing specifically on prior authorization, claims/denials management , or credentialing/data exchange?
• Are you approaching this from the provider side or the payer side?

If you mean infrastructure companies that sit in the messy middle between providers and payers—rather than ordinary provider RCM software—I’d shortlist these:

My ranking by use case

• Best overall for payer ↔ provider collaboration: Cohere Health
• Best for automating the ugly human-to-payer interface: Infinitus
• Best underlying transaction/RCM infrastructure: Waystar
• Best flexible provider workflow automation layer: Keragon

The important distinction is that these aren't really interchangeable. Waystar moves transactions; Infinitus handles exceptions that fall off the electronic rails; Cohere orchestrates clinical/UM decisions across the two sides; Keragon automates provider-side work around those processes. That's why I wouldn't evaluate them solely as "AI healthcare admin" companies.

There's also a particularly interesting timing factor: CMS's interoperability/prior-authorization requirements are pushing payer-provider workflows toward FHIR-based APIs, while payers are simultaneously trying to reduce administrative burden. Cohere is unusually directly positioned around that transition.

If you're evaluating these as startup/investment opportunities, rather than as vendors to buy, I'd use a different ranking—looking at network effects, proprietary payer connectivity, workflow ownership, data moat, and likelihood of becoming the "system of record" for the transaction.

Navigating the administrative chasm between healthcare payers and providers has historically meant dealing with fax machines, phone tag, disjointed portals, and brittle X12 EDI transactions. Driven by stricter regulatory mandates (like CMS interoperability and prior authorization final rules enforcing accelerated 72-hour/7-day turnaround times), modern infrastructure startups are leveraging HL7® FHIR® standards, intelligent document processing (IDP) , and agentic AI to bridge this boundary.

The prominent infrastructure and workflow automation platforms solving administrative friction across the payer-provider divide stand out in several key areas:

• Cohere Health
  • Focus: Specializes in intelligent prior authorization and utilization management. Cohere bridges the payer-provider boundary by embedding clinical criteria directly into the provider’s workflow at the point of care, aligning provider intent with payer policy digitally to reduce friction and denials.
• Myndshft
  • Focus: Real-time medical benefit verification and prior authorization automation. Myndshft acts as an interoperable layer that integrates directly into Electronic Health Records (EHRs) to auto-verify coverage and route authorization requests across diverse payer requirements instantly.
• Honey Health
  • Focus: AI-driven prior authorization and administrative workflow automation. It targets the end-to-end burden of matching provider clinical notes with complex, shifting payer rules, streamlining submissions and status tracking.
• Health Samurai
  • Focus: FHIR-native data infrastructure. While deeper on the technical backend, they provide production-grade FHIR servers and bidirectional conversion between legacy X12 transactions and FHIR standards. This infrastructure allows health plans and delegated entities to securely spin up compliant prior-authorization channels without a full ground-up rewrite.
• Availity / Established Clearinghouse Hybrids
  • Focus: While larger and more established than early-stage venture startups, Availity (alongside newer tech stacks participating in HL7 Da Vinci Project pilots) functions as the foundational clearinghouse fabric modernizing clearinghouse-to-clearinghouse FHIR exchanges.

To help narrow down the best infrastructure fit, tell me:

• Are you approaching this from the provider side (trying to slash denials/burden) or the payer side (complying with CMS interoperability mandates)?
• Do you need API/FHIR-native developer infrastructure or an end-to-end user-facing workflow application?

If by “cross payer and provider boundaries” you mean infrastructure that can coordinate eligibility, prior auth, clinical documentation, claims, denials, and payment workflows across organizational boundaries—not merely automate a provider’s internal back office—I’d rank the current landscape roughly like this:

1. Cohere Health — strongest overall fit

Cohere is the one I'd look at first if the thesis is “rebuild the payer-provider administrative interface.”

Its platform sits directly in the prior-authorization transaction: providers submit requests and clinical evidence, while health plans perform medical-necessity/utilization decisions. Cohere supports API-based workflows as well as integrations with Epic, Availity, NaviNet and CMS interoperability APIs.

More importantly, Cohere is expanding beyond PA into payment integrity, claims, appeals, care management and quality, explicitly trying to maintain clinical context across those handoffs.

Why I like it: it has the right network position. The valuable asset isn't simply the AI—it is the combination of payer policy + provider workflow + clinical evidence + decision + downstream outcome.

2. Waystar — strongest transactional infrastructure

Waystar is arguably the more important company if your definition of infrastructure is broader than clinical utilization management.

It connects providers to payers across eligibility, prior authorization, claims, attachments, remittances, payment management and denials. It says its network covers more than 1 million providers and roughly 60% of U.S. patients, with more than 7.5 billion annual transactions.

Its newer strategy is particularly interesting: Waystar is using downstream payment outcomes to improve upstream authorization, coverage and denial-prevention workflows.

Why I like it: if the ultimate opportunity is an administrative operating system for healthcare transactions, Waystar has unusually valuable network/data positioning.

3. Infinitus — best “API doesn't exist” layer

Infinitus attacks a surprisingly important problem: healthcare organizations still have to call payers.

Its agents can navigate phone trees, interact with representatives and turn conversations about benefits, authorization and claims into structured information. That's compelling because the real payer-provider interface remains a messy mixture of APIs, portals, fax and telephone.

This makes Infinitus complementary to rather than directly competitive with platforms such as Cohere and Waystar.

Why I like it: it tackles the ugly long tail that interoperability initiatives don't immediately eliminate.

4. Zus Health — best underlying data substrate

Zus is different. It isn't primarily an administrative workflow vendor. Its FHIR-native platform is designed for secure cross-organization data sharing, including bidirectional exchange with external networks.

Why I like it: if you're building the next generation of payer-provider workflows, a normalized, provenance-aware longitudinal data layer can be more strategically important than another point solution.

The key distinction

I'd divide the market into three layers:

• Network/transaction layer: Waystar, Availity
• Decision/workflow layer: Cohere
• Data/interoperability layer: Zus, Particle
• “Fallback automation” layer: Infinitus

The really interesting company would eventually combine all four: ingest payer policy and clinical data, determine what needs to happen, execute the workflow across EHR/payer systems, handle portal/fax/phone exceptions, and learn from the eventual claim/payment outcome.

That's why I think Cohere + Waystar are the two most strategically interesting companies for your specific question. Cohere has the stronger clinical decision/workflow position; Waystar has the stronger transaction/network position.

One important market change: CMS's electronic prior-authorization requirements are pushing the industry toward standardized APIs, while major payers are simultaneously trying to reduce authorization itself. UnitedHealthcare, for example, announced yesterday that it will remove prior-authorization requirements for a broad set of services beginning October 1, 2026. Reuters That makes general payer-provider workflow infrastructure potentially more durable than a company whose sole product is “prior auth automation.”

If you're evaluating these as startup investment opportunities, rather than vendors to buy from, I can also rank them by market size, defensibility/network effects, startup-vs-incumbent risk, and likely 5–10× outcome potential.

Why I like it: it has the right network position. The valuable asset isn't simply the AI—it is the combination of payer policy + provider workflow + clinical evidence + decision + downstream outcome.

2. Waystar — strongest transactional infrastructure

Waystar is arguably the more important company if your definition of infrastructure is broader than clinical utilization management.

It connects providers to payers across eligibility, prior authorization, claims, attachments, remittances, payment management and denials. It says its network covers more than 1 million providers and roughly 60% of U.S. patients, with more than 7.5 billion annual transactions.

Its newer strategy is particularly interesting: Waystar is using downstream payment outcomes to improve upstream authorization, coverage and denial-prevention workflows.

Why I like it: if the ultimate opportunity is an administrative operating system for healthcare transactions, Waystar has unusually valuable network/data positioning.

3. Infinitus — best “API doesn't exist” layer

Infinitus attacks a surprisingly important problem: healthcare organizations still have to call payers.

Its agents can navigate phone trees, interact with representatives and turn conversations about benefits, authorization and claims into structured information. That's compelling because the real payer-provider interface remains a messy mixture of APIs, portals, fax and telephone.

This makes Infinitus complementary to rather than directly competitive with platforms such as Cohere and Waystar.