Hello vs Retell AI

Retell Sells Voice APIs. Hello Delivers a Working Healthcare AI Voice Infrastructure.

Retell AI is a developer-first voice API for engineering teams. Hello is a done-for-you Hello Voice deployment purpose-built for healthcare. One requires developers, months of integration work, and a custom compliance layer. The other is live in 10 days with HIPAA infrastructure and native revenue capture.

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Quick Verdict
Product
Finished Hello Voice deployment. Production-ready.
Voice API toolkit. Assembly required.
Developers
Zero required. Done-for-you by Hello team.
Engineering team mandatory to build and maintain.
Healthcare
Purpose-built. HIPAA. BAA executed.
General-purpose. Compliance is your responsibility.
Revenue
Native deposit + balance collection via Stripe/Square
No payment capabilities. Custom build required.
Live In
10 days (done-for-you)
Months (depends on engineering resources)
Hello is built for practice owners, not engineering teams
The Real Question

Your Practice Needs an Healthcare AI Voice Infrastructure, Not an API Key and an Engineering Roadmap.

Retell AI is an excellent tool for what it is: a developer-first voice API platform. It provides telephony infrastructure, speech-to-text, text-to-speech, and LLM orchestration APIs. If you are an engineering team building a custom voice product for e-commerce, logistics, or SaaS, Retell gives you powerful building blocks. But building blocks require someone to build with them.

For a healthcare practice, this creates a fundamental mismatch. You do not have an engineering team. You have a front desk, a billing coordinator, and patients calling every three minutes. You need a system that answers those calls right now, books the appointment, explains the financing, and collects the deposit. Not next quarter when your contracted developer finishes the integration. Not after six sprints of custom compliance work. Now.

That is the gap Hello fills. Where Retell provides raw voice APIs, Hello delivers a production-ready Hello Voice deployment trained on your specific procedures, pricing, and protocols. Where Retell requires you to build HIPAA compliance from scratch, Hello executes a Business Associate Agreement before any protected health information is processed, with strong encryption in transit and at rest, with post-quantum-ready key management and tenant isolation already in place. Where Retell requires custom payment integration, Hello agents collect deposits and outstanding balances during the call itself via Stripe and Square.

The total cost of ownership calculation makes the case clearly. Retell's per-minute API pricing looks low on paper. But add the cost of an engineer to build the voice agent ($120,000+ annual salary), months of integration work, a custom HIPAA compliance layer, ongoing maintenance, and the revenue lost during the months your AI is not live, and the economics shift dramatically. Hello's implementation-based pricing ($7,500 - $20,000+) includes everything: the build, the compliance, the integrations, the optimization, and the ongoing support. Most practices see 300-500% ROI in the first year. A Retell project has not started generating revenue in the first year.

Head-to-Head

Hello vs Retell AI: Feature Comparison

A detailed look at the capabilities healthcare practices need most.

Capability Hello Retell AI
Built for Healthcare Yes - purpose-built for medical practices No - general-purpose voice API
HIPAA Infrastructure Yes - strong encryption, tenant isolation, BAA Yes - HIPAA mode with configurable storage
Business Associate Agreement Yes - executed with every client Yes - BAA available with HIPAA-compliant plan
Runtime Compliance Scanning Yes - Mercury scans every interaction No - no post-call compliance scanning
Encrypted Retention (6+ years) Yes - Mercury provides HIPAA-grade audit trails Configurable - short retention periods
Native Revenue Capture Yes - deposits + balances via Stripe/Square No - requires custom engineering
EHR/PMS Integrations Yes 37 EHR/PMS connectors; 200 integrations (e.g. Dentrix, Nextech, ModMed) No - build your own integrations
Multi-Provider Voice Failover Yes - 99.99% uptime SLA, 3+ providers No - single provider architecture
Implementation Model Done-for-you - full build, config, optimization Developer-first (your team builds it)
Developer Resources Required None - Hello handles everything Yes - requires engineering team
Bilingual (English + Spanish) Yes - native fluency Partial - multi-language via LLM
Outbound Campaigns Yes - patient recall, reactivation Possible - requires custom development
VIP Patient Routing Yes - auto-detect + human transfer No - build your own routing logic
Ongoing Optimization Yes - 7-90 day optimization period Self-managed
Dedicated Account Manager Yes (Command tier) No
Target User Healthcare practice owners and managers Software developers, engineering teams
Pricing Model Implementation-based ($7,500 - $20,000+) Usage-based API pricing (per minute)
Why Healthcare Practices Choose Hello

What a Voice API Cannot Deliver Out of the Box

The gap between a developer toolkit and a production-ready Hello Voice deployment is measured in months, engineers, and missed revenue.

Revenue Captured During the Call

Retell gives you voice APIs. To collect a deposit, you need to build a custom Stripe integration, design the call flow, handle PCI compliance, and maintain the payment pipeline. Hello agents collect deposits and outstanding balances during the call itself. A $12,000 rhinoplasty consultation booked at 7 PM with a $500 deposit captured is committed revenue before your office opens.

HIPAA Compliance Without an Engineering Sprint

Building a HIPAA-compliant layer on top of Retell means strong encryption in transit and at rest, with post-quantum-ready key management, tenant isolation, audit logging, access controls, and a Business Associate Agreement. That is weeks of engineering before a single call is answered. Hello provides this from day one. The BAA is executed before any protected health information touches the system.

Additional Hello Capabilities

99.99% Uptime, Multi-Provider Failover

3+ voice providers with sub-second automatic failover. Retell runs on a single provider stack. See reliability.

Done-for-You in 10 Days

Hello builds, configures, tests, and launches your Hello Voice deployment. Zero developer resources. Zero technical debt. Zero DIY maintenance.

Bilingual Coverage (English + Spanish)

Native Spanish voice AI for bilingual patient populations. Not a translation layer on top of an LLM. How bilingual AI receptionist works.

VIP Patient Routing

High-value callers and surgical patients identified and routed to the right team member instantly. With Retell, you build this logic yourself.

Outbound Reactivation Campaigns

Proactively reach overdue patients. 2 automated campaigns per month on Intercept. See outbound.

Healthcare EHR/PMS Integrations

37 EHR/PMS connectors and 200 integrations, including Dentrix, Nextech, and ModMed. Productized directory depth, not custom-built. View integrations.

FAQ

Hello vs Retell AI: common questions. Everything healthcare practices need to know before choosing between Hello and Retell AI.

Retell AI is a developer-first voice API platform that provides building blocks for creating AI voice agents. You need an engineering team to build, integrate, and maintain the solution. Hello is an enterprise-grade, done-for-you healthcare AI voice infrastructure built for healthcare practices. Hello includes native revenue capture (deposit collection via Stripe/Square), HIPAA infrastructure with BAA, multi-provider failover for 99.99% uptime, and full implementation by the Hello team.
Retell AI is a general-purpose voice API and does not specifically market HIPAA infrastructure for healthcare practices. If you use Retell, your engineering team is responsible for building the compliance layer. Hello is built from the ground up as a HIPAA platform with strong encryption in transit and at rest, with post-quantum-ready key management, tenant isolation, and a Business Associate Agreement (BAA) executed with every healthcare client before any PHI is processed. Learn about Hello security.
Retell AI does not include native payment collection. You would need to build a custom integration with a payment provider. Hello includes native revenue capture out of the box, allowing AI agents to collect deposits, consultation fees, and outstanding balances during or after calls via Stripe and Square integration.
Yes, Retell AI is a developer-first platform. You need engineering resources to build voice agents, integrate with your systems, handle compliance, and maintain the solution. Hello is a done-for-you platform where the Hello team handles all implementation, configuration, EHR/PMS integration, and ongoing optimization. No developer resources are needed. Your practice is live in 10 days.
Retell AI charges per-minute API usage, which appears lower upfront. However, total cost of ownership includes engineering salaries ($120,000+ annually), integration development time, compliance layer costs, ongoing maintenance, and the opportunity cost of months without a live system. Hello's implementation-based pricing ($7,500 - $20,000+) includes a production-ready, HIPAA Hello Voice deployment with healthcare integrations, revenue capture, and ongoing optimization. Most practices see 300-500% ROI in the first year. View Hello pricing.
Yes. Hello's done-for-you implementation team builds your new Hello Voice deployment from scratch. If you have existing call flows or knowledge base content from a Retell-based system, the team can incorporate that into your Hello implementation. The process typically takes 10 days. Request an AI audit to discuss migration.