#1Top pick
Developer-friendly platform to build and run AI phone agents
Retell AI is a platform for building AI voice agents that make and take phone calls. Pricing is pay-as-you-go per minute, and every account gets templates, call analytics, simulation testing and API access. It is HIPAA-ready with BAA support, which makes it common for healthcare and other regulated builds.
Why it's here
- +Transparent per-minute pricing
- +20 free concurrent calls
- +HIPAA/BAA support
- +Simulation testing before launch
Watch out for
- −You design the call flow yourself
- −Real cost depends on the LLM and voice you pick
- −Not a done-for-you receptionist
#2
API-first voice agent platform where you pick each model
Vapi is a developer platform for building voice AI agents where you choose the speech-to-text, LLM and voice providers. You pay a hosting fee per minute plus each provider's cost, roughly $82–$129 for 1,000 minutes by Vapi's own estimate. HIPAA-eligible handling is a paid add-on.
Why it's here
- +Mix and match providers
- +Free Vapi telephony and WebRTC
- +Strong API and SDKs
Watch out for
- −Stacked pricing is hard to predict
- −HIPAA costs $2,000/mo extra
- −Requires engineering time
E#3Free option
Voice agents built on ElevenLabs' realistic voices
ElevenLabs Agents is ElevenLabs' platform for building conversational voice agents for phone, web and apps. It uses the company's text-to-speech voices, and extra call minutes cost $0.08 each with LLM usage billed separately. A free plan includes 15 minutes of calls, and BAAs are available on enterprise.
Why it's here
- +Very natural voices
- +Free plan to prototype
- +Same account covers TTS, dubbing and agents
Watch out for
- −LLM costs are extra
- −Burst minutes cost double
- −HIPAA BAA only on enterprise
Free · from $0.08/minAutonomous
#4
Voice agent platform with all-in per-minute pricing
Bland AI is a platform for building AI phone agents for inbound and outbound calls at scale. Its per-minute rate includes the LLM, speech-to-text and text-to-speech, with no token charges, while telephony is billed separately. Enterprise plans add dedicated infrastructure, on-prem options and a BAA.
Why it's here
- +Model costs bundled into one rate
- +No platform fee to start
- +On-prem/VPC on enterprise
Watch out for
- −Higher per-minute rate than DIY stacks
- −Daily call caps on the free-fee plan
- −BAA only on enterprise
#5
Enterprise voice AI platform sold on annual contracts
Synthflow is a voice AI platform for building phone agents for contact centers and large teams. New deployments start on an annual enterprise contract priced on call volume, concurrency and integrations, with no public per-minute rate. It maintains HIPAA, SOC 2 Type 2, ISO 27001 and GDPR coverage.
Why it's here
- +HIPAA and SOC 2 Type 2
- +No-code builder
- +Launch support included in contracts
Watch out for
- −No self-serve plan or trial
- −Annual commitment required
- −Pricing only by quote
#6
Enterprise voice agents for customer service lines
PolyAI is an enterprise platform for voice and chat agents that resolve customer calls without a human. Large companies in hospitality, retail, finance, healthcare and utilities use it for bookings, billing, authentication and call routing. It runs on its own dialog models and is sold through sales.
Why it's here
- +Built for high-volume enterprise calls
- +Handles authentication and billing flows
- +Own dialog models
Watch out for
- −Not aimed at small businesses
- −No public pricing
- −Longer implementation than self-serve tools
#7
Voice AI agents for sales and service teams, sold by quote
Thoughtly is a voice AI platform for building phone agents that qualify leads, book appointments and handle service calls. All plans list unlimited voice minutes, with usage above allowances billed in arrears. HIPAA and BAA coverage is limited to the enterprise tier.
Why it's here
- +Unlimited voice minutes listed on all plans
- +Covers inbound and outbound
- +Enterprise HIPAA option
Watch out for
- −No public prices
- −HIPAA only on enterprise
- −Overage billed after the fact
#8
Collaborative builder for chat and voice customer agents
Voiceflow is a platform for designing, building and deploying AI agents for chat and voice. Teams use its visual builder to create support agents and deploy them across channels. Business pricing is by request, and agencies get usage-based billing with a free trial.
Why it's here
- +Visual, collaborative builder
- +Deploys to chat and voice
- +Agency program
Watch out for
- −No public pricing or free plan for businesses
- −You still design the flows
- −Overkill for a single small site
#9
No-code AI voice agents for inbound and outbound calls
CallFluent AI is a no-code builder for AI voice agents that handle inbound and outbound calls for bookings, reminders, surveys and support. It offers hundreds of voices and many languages and connects to Google Calendar, GoHighLevel and Zapier. You bring your own Twilio account for phone numbers.
Why it's here
- +Cheap flat plans
- +Inbound and outbound on Business plan
- +White-label option for agencies
Watch out for
- −Needs your own Twilio account
- −Starter is inbound only
- −Advertised discounts make list price unclear
#10
Customer agents for large brands with outcome-based pricing
Sierra is a conversational AI platform that lets large companies build branded customer agents. One agent can run across chat, SMS, WhatsApp, email, voice and ChatGPT. Pricing is outcome-based, so you pay for results such as resolved conversations rather than raw usage.
Why it's here
- +Covers six channels including voice
- +Outcome-based pricing
- +Build with or without engineers
Watch out for
- −Enterprise only
- −No published prices
- −Long sales cycle
#11
AI voice agents for specialty practice phone lines
Assort Health is an AI voice agent for healthcare practices that answers patient calls for scheduling, intake, referrals, triage, refills and payments. It serves specialty practices, FQHCs and health systems across 23+ specialties. It integrates with 15+ EHR and practice management systems, including athenahealth.
Why it's here
- +Built only for patient calls
- +Handles scheduling end to end
- +EHR integrations
Watch out for
- −No public pricing
- −Voice-focused, less chat
- −Aimed at practices with real call volume
#12
Healthcare voice agents for outreach, intake and follow-up, priced per hour
Hippocratic AI builds generative AI voice agents for health systems, payors and pharma that handle non-diagnostic patient conversations. Agents cover post-discharge follow-up, preventive care outreach, scheduling and pre-visit intake, and do not diagnose or prescribe. Pricing is per hour of use, from $2.50 an hour on its lightest model.
Why it's here
- +Purpose-built and safety-focused for healthcare
- +Transparent hourly rates
- +Wide set of clinical-adjacent agents
Watch out for
- −Aimed at large health organizations
- −Not a front-desk receptionist for small clinics
- −Does not diagnose or prescribe by design
#13
Insurance-native AI agents for claims, service and sales
Liberate is an AI agent platform for insurance carriers that handles conversations across voice, SMS, email and digital channels. Its agents take first notice of loss, give claim status, process billing and policy servicing, and qualify and bind sales leads. It integrates with Guidewire, Duck Creek, Applied, Vertafore and Snapsheet.
Why it's here
- +Built by insurance people for insurance workflows
- +Core-system integrations
- +Voice and digital channels
Watch out for
- −Carrier-focused, not small agencies
- −No public pricing
- −Enterprise implementation
More voice agents agents
Listed but not yet reviewed in depth.
