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Comparison LabCompare 27 voice AI platforms and components across seven buying contexts, with sourced capabilities, current price captures and visible unknowns.Voice AI Price Index: prices, evidence and historyUnderstand the complete voice-agent cost stack: models, voice, transcription, telephony, subscriptions, capacity and add-ons.Know the cost before the first callEstimate monthly voice-agent costs, AI minutes, setup expenses and volume scenarios using your own transparent assumptions.AI voice agents for dentalAppointments, rescheduling and after-hours calls—with a person ready for clinical questions. Explore call flows, safe automation, integrations, tests and cost considerations.

Compare Lab

PolyAI vs Retell AI

PolyAI is positioned as enterprise dialog-agent platform with a builder, developer tooling and system integrations. Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operatio

The decision in context

PolyAI is positioned as enterprise dialog-agent platform with a builder, developer tooling and system integrations. Retell AI is positioned as a configurable call-agent platform with visual flows, APIs and integrated call operations. Start by deciding who owns the missing layers, then inspect the documented differences below.

Enterprise Platforms and Full Platforms are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.

17 jointly documented catalog fields. This measures evidence coverage, not equivalent quality or an overall winner.

Compare for the job

Test opening hours, booking conflicts and an unanswered transfer.

2 of 4 slots
PolyAIRetell AI
Decision signals / differences first

Start where the records differ.

6 of 8 priority fields differ

Values and evidence states are compared together. Shared facts follow the differences; Unknown never means No.

Selected platforms: buyer-critical differences before detailed dimensions
Decision pointPolyAIRetell AI
Billing modelDifferent records
per-minuteVerified Yes · 2026-09-28
component-stackVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
Billing unitDifferent records
Voice agent minuteVerified Yes · 2026-09-28
minuteVerified Yes · 2026-09-28Documented product/configuration only; see research notes · PAYG
Bring your telephonyDifferent records
YesConditional · 2026-09-28
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
Bring your modelDifferent records
YesConditional · 2026-09-28BYOM integration setup
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
Warm transferDifferent records
UnknownUnknown after research · 2026-09-28
YesVerified Yes · 2026-09-28Documented product/configuration only; see research notes
WebhooksDifferent records
YesConditional · 2026-09-28Unknown
YesVerified Yes · 2026-09-28API / webhookDocumented product/configuration only; see research notes
Your requirements & next steps
Carried from your shortlist

Your requirements

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Ready-made / AI receptionist · Strict evidence mode

No personal requirements yet. Add criteria in Advanced Filter to prioritize this comparison.

Unknown ≠ No
Evidence, side by sideNo benchmark scores
PolyAIEnterprise Platforms
Retell AIFull Platforms
Pricing model
PolyAI
per-minuteVerified Yes · 2026-09-28

Sales-led per-minute contract rate, not a public numerical rate.

Retell AI
component-stackVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Headline / base price
PolyAI
UnknownUnknown after research · 2026-09-28

Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.

Retell AI
Voice-agent configuration range $0.07–$0.31/minVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Billing unit
PolyAI
Voice agent minuteVerified Yes · 2026-09-28

Published unit; precise fee and minimum quote unresolved.

Retell AI
minuteVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Platform fee
PolyAI
UnknownUnknown after research · 2026-09-28

Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.

Retell AI
PAYG $0; optional recurring number/concurrency/KB chargesVerified Yes · 2026-09-28

Zero platform fee is not zero total fixed cost.

Included usage
PolyAI
Maintenance, upgrades, monitoring and24/7support in quoted plansVerified Yes · 2026-09-28

No included minute allowance published in reviewed page.

Retell AI
20 concurrent call slots and first 10 knowledge bases; call usage billed separatelyVerified Yes · 2026-09-28

Paid extras$8/slot/month and$8/KB/month; usage separate.

Overage
PolyAI
UnknownUnknown after research · 2026-09-28

Sales-led per-minute service and build credits are documented; no public complete rate/commitment, recurring free entitlement or provider cost inclusions established.

Retell AI
Metered usage; selected model, voice, carrier and add-ons determine rateVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Pass-through costs
PolyAI
UnknownUnknown after research · 2026-09-28

Sales-led per-minute service and build credits are documented; no public complete rate/commitment, recurring free entitlement or provider cost inclusions established.

Retell AI
Telephony, selected LLM/TTS, add-ons and concurrency burst can add chargesVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Free offer
PolyAI
UnknownNot researched

Not yet researched against this buyer-critical field standard.

Retell AI
$10 free creditsVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

PAYG
Complete cost ceiling
PolyAI
UnknownUnknown after research · 2026-09-28

Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.

Retell AI
UnknownUnknown after research · 2026-09-28

A headline configuration range is not a ceiling on telephony, model, add-on or burst charges.

Documented product/configuration only; see research notes · PAYG
What remains unresolved
PolyAI
UnknownUnknown after research · 2026-09-28

Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling.

Retell AI
A headline configuration range is not a ceiling on telephony, model, add-on or burst charges.Verified Yes · 2026-09-28

Research conclusion about cost completeness, not a vendor capability.

Documented product/configuration only; see research notes · PAYG

Anyone with this link can view the encoded decision criteria.

Vendor documentation establishes a claim. Public model benchmarks are separate context, not measurements of these platforms.

Open saved comparison ↗

What to verify together.

PolyAI

The public pricing page gives a billing basis, not a numeric quote.

Custom quote / current rate unresolved · V3.3 evidence review · Contract-defined minute billing; no public numeric quote

Excluded / confirm: Complete cost cannot be established from this reference. Commercial rate, commitment and workload exceptions require quote; no fabricated all-in ceiling. · Provider, carrier and custom contract terms require separate verification

per-minuteVerified Yes · 2026-09-28

Sales-led per-minute contract rate, not a public numerical rate.

Read the complete profile →

Retell AI

The advertised price band is not a ceiling for every model configuration.

Voice-agent configuration range $0.07–$0.31/min · V3.3 evidence review · Published configured-agent range lower reference; not a guaranteed all-in floor or ceiling

Excluded / confirm: Complete cost cannot be established from this reference. A headline configuration range is not a ceiling on telephony, model, add-on or burst charges. · Telephony, selected LLM/TTS, add-ons and concurrency burst can add charges

component-stackVerified Yes · 2026-09-28

Reviewed current public offer; retain original billing scope and units.

Documented product/configuration only; see research notes · PAYG
Read the complete profile →

The evidence overlap.

Both records have documented values for Product type, Technical setup, Pricing model, DTMF, Call recording, ElevenLabs TTS, Cartesia TTS, OpenAI models, Anthropic models, MCP tools, Knowledge base / RAG, Function / tool calling and additional fields shown in Compare. Matching availability does not measure behavior under your call conditions.

Run the same booking, tool failure and unsuccessful human-transfer cases. Record both outcomes and billable units before signing a deployment agreement.

Build a buyer-operated pilot →

Editorial index gate: noindex-cross-category. Different product layers. This pair is useful for architecture inspection, not a like-for-like purchase ranking.